High-temperature wear-resistant sintered alloy

BACKGROUND OF THE INVENTION
The present invention relates to an iron-based sintered alloy which is wear-resistant at high temperature. Such sintered alloy is preferably used as a material for mechanical parts (e.g., such as valve seat insert used in internal combustion engine) that require wear resistance at high temperature.
There are various conventional wear resistant materials. For example, Japanese Patent Examined Publication JP-B-5-55593 and Japanese Patent Unexamined Publication JP-A-7-233454 disclose high-temperature wear-resistant sintered alloys each being high in cobalt content. However, the production cost of these sintered alloys is high, due to the use of relatively large amounts of cobalt.
JP-A-5-9667 discloses an iron-based sintered alloy containing an iron-based matrix and an iron-based hard phase dispersed in the matrix. The hard phase contains C, Cr, Mo, W, V, Si, and Mn. JP-B-1-51539 discloses an iron-based sintered alloy containing an iron-based matrix and a dispersed phase containing Cr, C, Mo, Si, and at least one selected from Nb, Ta, Ti and V. According to these patent publications '667 and '539, however, it is difficult to prepare a sintered alloy that is superior in wear resistance and at the same time is weak in the property of damaging another member that is in contact with the sintered alloy.
SUMMARY OF THE INVENTION
It is therefore an object of the present invention to provide a sintered alloy that has wear-resistance at high temperature and good compatibility without damaging mating part that is in contact with the sintered alloy.
According to the following first to eighth aspects of the present invention, the sintered alloy has wear-resistance at high temperature and good compatibility without damaging mating part that is in contact with the sintered alloy.
According to the first aspect of the present invention, there is provided a high-temperature wear-resistant sintered alloy comprising, based on a total weight of said sintered alloy, 3-13.4 wt % of W, 0.4-5.6 wt % of V, 0.2-5.6 wt % of Cr, 0.1-0.6 wt % of Si, 0.1-0.6 wt % of Mn, 0.6-2.2 wt % of C, and a balance of Fe. This sintered alloy includes a first phase comprising, based on a total weight of said first phase, 3-7 wt % of W, up to 1 wt % of Cr, 0.1-0.6 wt % of Si, 0.1-0.6 wt % of Mn, up to 2.2 wt % of C, and a balance of Fe; and a second phase comprising, based on a total weight of said second phase, 3-15 wt % of W, 2-7 wt % of V, 1-7 wt % of Cr, 0.1-0.6 wt % of Si, 0.1-0.6 wt % of Mn, up to 2.2 wt % of C, and a balance of Fe, said second phase being in an amount of from 20 to 80 wt %, based on a total weight of said first and second phases.
According to the second aspect of the present invention, there is provided a high-temperature wear-resistant sintered alloy comprising, based on a total weight of said sintered alloy, 3-13.4 wt % of W, 0.8-5.9 wt % of V, 0.2-5.6 wt % of Cr, 0.1-0.6 wt % of Si, 0.1-0.6 wt % of Mn, 0.6-2.2 wt % of C, and a balance of Fe. This sintered alloy includes a first phase comprising, based on a total weight of said first phase, 3-7 wt % of W, 0.5-1.5 wt % of V, up to 1 wt % of Cr, 0.1-0.6 wt % of Si, 0.1-0.6 wt % of Mn, up to 2.2 wt % of C, and a balance of Fe; and a second phase comprising, based on a total weight of said second phase, 3-15 wt % of W, 2-7 wt % of V, 1-7 wt % of Cr, 0.1-0.6 wt % of Si, 0.1-0.6 wt % of Mn, up to 2.2 wt % of C, and a balance of Fe, said second phase being in an amount of from 20 to 80 wt %, based on a total weight of said first and second phases.
According to the third aspect of the present invention, there is provided a high-temperature wear-resistant sintered alloy comprising, based on a total weight of said sintered alloy, 3-13.4 wt % of W, 0.4-5.6 wt % of V, 0.2-5.6 wt % of Cr, 0.1-0.6 wt % of Si, 0.2-1.0 wt % of Mn, 0.1-0.6 wt % of S, 0.6-2.2 wt % of C, and a balance of Fe. This sintered alloy includes a first phase comprising, based on a total weight of said first phase, 3-7 wt % of W, up to 1 wt % of Cr, 0.1-0.6 wt % of Si, 0.2-1.0 wt % of Mn, 0.1-0.6 wt % of S, up to 2.2 wt % of C, and a balance of Fe; and a second phase comprising, based on a total weight of said second phase, 3-15 wt % of W, 2-7 wt % of V, 1-7 wt % of Cr, 0.1-0.6 wt % of Si, 0.2-1.0 wt % of Mn, 0.1-0.6 wt % of S, up to 2.2 wt % of C, and a balance of Fe, said second phase being in an amount of from 20 to 80 wt %, based on a total weight of said first and second phases.
According to the fourth aspect of the present invention, there is provided a high-temperature wear-resistant sintered alloy comprising, based on a total weight of said sintered alloy, 3-13.4 wt % of W, 0.8-5.9 wt % of V, 0.2-5.6 wt % of Cr, 0.1-0.6 wt % of Si, 0.2-1.0 wt % of Mn, 0.1-0.6 wt % of S, 0.6-2.2 wt % of C, and a balance of Fe. This sintered alloy includes a first phase comprising, based on a total weight of said first phase, 3-7 wt % of W, 0.5-1.5 wt % of V, up to 1 wt % of Cr, 0.1-0.6 wt % of Si, 0.2-1.0 wt % of Mn, 0.1-0.6 wt % of S, up to 2.2 wt % of C, and a balance of Fe; and a second phase comprising, based on a total weight of said second phase, 3-15 wt % of W, 2-7 wt % of V, 1-7 wt % of Cr, 0.1-0.6 wt % of Si, 0.2-1.0 wt % of Mn, 0.1-0.6 wt % of S, up to 2.2 wt % of C, and a balance of Fe, said second phase being in an amount of from 20 to 80 wt %, based on a total weight of said first and second phases.
According to the fifth aspect of the present invention, there is provided a high-temperature wear-resistant sintered alloy comprising, based on a total weight of said sintered alloy, 3-13.4 wt % of W, 0.4-5.6 wt % of V, 0.2-5.6 wt % of Cr, 0.6-5.0 wt % of Si, 0.1-0.6 wt % of Mn, 0.6-2.2 wt % of C, and a balance of Fe. This sintered alloy includes a first phase comprising, based on a total weight of said first phase, 3-7 wt % of W, up to 1 wt % of Cr, 0.6-5.0 wt % of Si, 0.1-0.6 wt % of Mn, up to 2.2 wt % of C, and a balance of Fe; and a second phase comprising, based on a total weight of said second phase, 3-15 wt % of W, 2-7 wt % of V, 1-7 wt % of Cr, 0.6-5.0 wt % of Si, 0.1-0.6 wt % of Mn, up to 2.2 wt % of C, and a balance of Fe, said second phase being in an amount of from 20 to 80 wt %, based on a total weight of said first and second phases.
According to the sixth aspect of the present invention, there is provided a high-temperature wear-resistant sintered alloy comprising, based on a total weight of said sintered alloy, 3-13.4 wt % of W, 0.8-5.9 wt % of V, 0.2-5.6 wt % of Cr, 0.6-5.0 wt % of Si, 0.1-0.6 wt % of Mn, 0.6-2.2 wt % of C, and a balance of Fe. This sintered alloy includes a first phase comprising, based on a total weight of said first phase, 3-7 wt % of W, 0.5-1.5 wt % of V, up to 1 wt % of Cr, 0.6-5.0 wt % of Si, 0.1-0.6 wt % of Mn, up to 2.2 wt % of C, and a balance of Fe; and a second phase comprising, based on a total weight of said second phase, 3-15 wt % of W, 2-7 wt % of V, 1-7 wt % of Cr, 0.6-5.0 wt % of Si, 0.1-0.6 wt % of Mn, up to 2.2 wt % of C, and a balance of Fe, said second phase being in an amount of from 20 to 80 wt %, based on a total weight of said first and second phases.
According to the seventh aspect of the present invention, there is provided a high-temperature wear-resistant sintered alloy comprising, based on a total weight of said sintered alloy, 3-13.4 wt % of W, 0.4-5.6 wt % of V, 0.2-5.6 wt % of Cr, 0.6-5.0 wt % of Si, 0.2-1.0 wt % of Mn, 0.1-0.6 wt % of S, 0.6-2.2 wt % of C, and a balance of Fe. This sintered alloy includes a first phase comprising, based on a total weight of said first phase, 3-7 wt % of W, up to 1 wt % of Cr, 0.6-5.0 wt % of Si, 0.2-1.0 wt % of Mn, 0.1-0.6 wt % of S, up to 2.2 wt % of C, and a balance of Fe; and a second phase comprising, based on a total weight of said second phase, 3-15 wt % of W, 2-7 wt % of V, 1-7 wt % of Cr, 0.6-5.0 wt % of Si, 0.2-1.0 wt % of Mn, 0.1-0.6 wt % of S, up to 2.2 wt % of C, and a balance of Fe, said second phase being in an amount of from 20 to 80 wt %, based on a total weight of said first and second phases.
According to the eighth aspect of the present invention, there is provided a high-temperature wear-resistant sintered alloy comprising, based on a total weight of said sintered alloy, 3-13.4 wt % of W, 0.8-5.9 wt % of V, 0.2-5.6 wt % of Cr, 0.6-5.0 wt % of Si, 0.2-1.0 wt % of Mn, 0.1-0.6 wt % of S, 0.6-2.2 wt % of C, and a balance of Fe. This sintered alloy includes a first phase comprising, based on a total weight of said first phase, 3-7 wt % of W, 0.5-1.5 wt % of V, up to 1 wt % of Cr, 0.6-5.0 wt % of Si, 0.2-1.0 wt % of Mn, 0.1-0.6 wt % of S, up to 2.2 wt % of C, and a balance of Fe; and a second phase comprising, based on a total weight of said second phase, 3-15 wt % of W, 2-7 wt % of V, 1-7 wt % of Cr, 0.6-5.0 wt % of Si, 0.2-1.0 wt % of Mn, 0.1-0.6 wt % of S, up to 2.2 wt % of C, and a balance of Fe, said second phase being in an amount of from 20 to 80 wt %, based on a total weight of said first and second phases.
According to each of the first to eighth aspects of the present invention, the first and second phases of the sintered alloy are distributed therein, in the form of spots, respectively.
According to the ninth aspect of the present invention, the sintered alloy of the first, second, fifth or sixth aspect of the present invention may comprise 0.3-1.6 wt % of MnS that is distributed in a boundary between a first grain of the first phase and a second grain of the second phase and/or in a pore of the sintered alloy.

BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a graph showing the wears of valve seat insert, valve and their total, under the use of unleaded gasoline, versus the tungsten content of the first phase of each sintered alloy;
FIG. 2 is a graph similar to FIG. 1, but showing those versus that of the second phase thereof;
FIG. 3 is a graph similar to FIG. 1, but showing those versus the vanadium content of the second phase thereof;
FIG. 4 is a graph similar to FIG. 3, but showing those versus that of the first phase thereof;
FIG. 5 is a graph similar to FIG. 4, but showing the wears thereof under the use of leaded gasoline versus that of the first phase thereof;
FIG. 6 is a graph similar to FIG. 1, but showing those versus the chromium content of the second phase thereof;
FIG. 7 is a graph similar to FIG. 7, but showing those versus that of the first phase thereof;
FIG. 8 is a graph similar to FIG. 1, but showing those versus the weight percent of the second phase, based on the total weight of the first and second phases;
FIG. 9 is a graph similar to FIG. 1, but showing those under the use of leaded gasoline versus the silicon content of the first or second phase thereof;
FIG. 10 is a graph similar to FIG. 9, but showing the radial crushing strength of each sintered alloy versus that;
FIG. 11 is a graph similar to FIG. 10, but showing that versus the manganese content of the first or second phase thereof;
FIG. 12 is a graph similar to FIG. 10, but showing that versus the precipitated MnS content of the first or second phase thereof;
FIG. 13 is a graph similar to FIG. 12, but showing the density of the compact of each powder mixture versus that;
FIG. 14 is a graph similar to FIG. 12, but showing the maximum cutting force of each sintered alloy versus that;
FIG. 14a is a graph similar to FIG. 10, but showing that versus the added MnS content of the first or second phase thereof;
FIG. 14b is a graph similar to FIG. 14a, but showing the density of the compact of each powder mixture versus that;
FIG. 14c is a graph similar to FIG. 14a, but showing the maximum cutting force of each sintered alloy versus that;
FIG. 15 is a graph similar to FIG. 1, but showing those under the use of leaded gasoline versus that;
FIG. 16 is a graph similar to FIG. 15, but showing those versus the tungsten content of the second phase thereof;
FIG. 17 is a graph similar to FIG. 15, but showing those versus the vanadium content of the second phase thereof;
FIG. 18 is a graph similar to FIG. 15, but showing those versus the chromium content of the second phase thereof;
FIG. 19 is a graph similar to FIG. 15, but showing those versus the chromium content of the first phase thereof;
FIG. 20 is a graph similar to FIG. 15, but showing those versus the weight percent of the second phase, based on the total weight of the first and second phases;
FIG. 21 is a graph similar to FIG. 15, but showing those versus the silicon content of the first or second phase thereof;
FIGS. 22-26 are graphs respectively similar to FIGS. 10-14, but showing the data of other samples of the sintered alloys; and
FIGS. 26a-26c are graphs respectively similar to FIGS. 14a-14c, but showing the data of other samples of the sintered alloys.

DESCRIPTION OF THE PREFERRED EMBODIMENTS
According to each of the above-mentioned first, second, fifth and sixth aspects of the present invention, the sintered alloy may contain 0.3-1.6 wt % of MnS that is distributed in a boundary between first grains of the first phase and second grains of the second phase and/or in pores of the sintered alloy. Due to the inclusion of this MnS, the sintered alloy can be substantially improved in machinability.
According to each of the above-mentioned first to ninth aspects of the present invention, the sintered alloy may contain a first metal that is one of metallic copper and a copper alloy. This first metal may be contained in the sintered alloy in a manner that the first metal is incorporated into the sintered alloy by infiltrating pores of the sintered alloy with a first melt of the first metal. Thus, according to the first, second, fifth and sixth aspects of the present invention, the sintered alloy may contain both of the first metal and 0.3-1.6 wt % of the MnS. According to each of the above-mentioned first to ninth aspects of the present invention, the sintered alloy may contain a second metal that is one of metallic lead and a lead alloy. The second metal may be contained in the sintered alloy in a manner to impregnate pores of the sintered alloy with the melted second metal. Thus, according to the first, second, fifth and sixth aspects of the present invention, the sintered alloy may contain both of the second metal and 0.3-1.6 wt % of the MnS. According to each of the above-mentioned first to ninth aspects of the present invention, the sintered alloy may contain an acrylic resin that is incorporated thereinto in a manner that is the same as that of the second metals. Thus, according to the first, second, fifth and sixth aspects of the present invention, the sintered alloy may contain both of the acrylic resin and 0.3-1.6 wt % of the MnS. Due to the inclusion of the first or second metal as above, the sintered alloy can be far superior in wear resistance. Due to the inclusion of the second metal or acrylic resin as above, the sintered alloy can be further improved in machinability.
According to each of the fifth to eighth aspects of the present invention, the silicon content of each of the total of the sintered alloy and its first and second phases is adjusted to a range of from 0.6 to 5.0 wt %. According to each of the second, fourth, sixth and eighth aspects of the present invention, the vanadium content of the first phase of the sintered alloy is adjusted to a range of from 0.5 to 1.5 wt %. With these adjustments, the sintered alloy of each of the second and the fourth to eighth aspects of the present invention can be further improved in wear resistance even under a condition that this sintered alloy is used, for example, as a valve seat insert of an internal combustion engine running with leaded gasoline. By the above adjustment of the silicon content, the sintered alloys according to the fifth and seventh aspects of the present invention are respectively more improved in corrosion resistance, as compared with the sintered alloy according to the first aspect of the present invention, although these sintered alloys and the powder mixtures for preparing the same respectively become lower, in hardness and compressibility, than the sintered alloy of the first aspect of the present invention and than the powder mixture for preparing the same. By the above adjustment of the silicon content, the sintered alloys according to the sixth and eighth aspects of the present invention are also respectively more improved in corrosion resistance, as compared with the sintered alloy according to the second aspect of the present invention, although these sintered alloys and the powder mixtures for preparing the same respectively become lower, in hardness and compressibility, than the sintered alloy of the second aspect of the present invention and than the powder mixture for preparing the same. Thus, as stated above, the sintered alloy according to each of the fifth to eighth aspects of the present invention becomes superior in wear resistance under the above condition in which leaded gasoline is used. According to each of the fifth to eighth aspects of the present invention, if the silicon content is greater than 5.0 wt %, the sintered alloy becomes low in hardness. Furthermore, the powder mixture for preparing sintered alloy becomes substantially low in compressibility. If the silicon content is lower than 0.6 wt %, the sintered alloy does not sufficiently improved in corrosion resistance. According to each of the second, fourth, sixth and eighth aspects of the present invention, if the vanadium content of the first phase is lower than 0.5 wt %, the sintered alloy becomes low in wear resistance, due to the insufficient corrosion resistance. If it is higher than 1.5 wt %, the sintered alloy used as the valve seat insert becomes strong in the property of damaging the valve.
According to the third, fourth, seventh and eighth aspects of the present invention, the manganese and sulfur contents of each of the total of the sintered alloy and its first and second phases are respectively adjusted to a range of from 0.2 to 1.0 wt % and a range of from 0.1 to 0.6 wt %. With these adjustments, MnS precipitates in the first and second phases of the corresponding sintered alloys. Therefore, the sintered alloy can be substantially improved in machinability. If the manganese and sulfur contents are respectively higher than 1.0 wt % and 0.6 wt %, the powder mixture for preparing the sintered alloy becomes low in compressibility. With this, the sintered alloy becomes low in hardness. If the manganese and sulfur contents are respectively lower than 0.2 wt % and 0.1 wt %, MnS does not precipitate in a sufficient amount. Therefore, the sintered alloy does not sufficiently improved in machinability.
As compared with conventional sintered alloys containing large amounts of cobalt, the sintered alloy according to the present invention can be much more economically produced and is substantially improved in wear resistance.
According to each of the first to eighth aspects of the present invention, the first and second phases of the sintered alloy may respectively have first and second grains each of which has an average particle diameter of from 20 to 150 .mu.m.
According to the first aspect of the present invention, the sintered alloy may have a first phase that is M.sub.6 C-type tungsten carbide dispersed in the sintered alloy, and a second phase which is from 20 to 150 .mu.m in average particle diameter, is reinforced with chromium, and is made of M.sub.6 C-type tungsten carbide and MC-type vanadium carbide that are uniformly dispersed therein. With these first and second phases, when the sintered alloy is used as a valve seat insert of an internal combustion engine, it can be sufficiently weak in the property of damaging the valve.
In the present invention, if the tungsten content of the first phase of the sintered alloy is greater than 7 wt %, the sintered alloy used as the valve seat insert becomes strong in the property of damaging the valve. If the tungsten content thereof is less than 3 wt %, the sintered alloy used as the valve seat insert becomes inferior in wear resistance. As the chromium content of the first phase of the sintered alloy increases, the sintered alloy used as the valve seat insert becomes stronger in the property of damaging the valve. Thus, chromium may be omitted in the first phase of the sintered alloy, but the first phase may contain up to 1 wt % of chromium generated by the diffusion from the second phase into the first phase, at the time of sintering.
In the present invention, if the tungsten and vanadium contents of the second phase of the sintered alloy are respectively greater than 15 wt % and 7 wt %, the sintered alloy used as the valve seat insert becomes strong in the property of damaging the valve. If they are respectively lower than 3 wt % and 2 wt %, it becomes inferior in wear resistance. Due to the inclusion of 1-7 wt % of chromium in the second phase of the sintered alloy, the sintered alloy becomes improved in harden ability. Furthermore, the MC-type vanadium carbide deposits in the second phase, and thus the second phase becomes harder than the first phase. Therefore, the sintered alloy becomes uneven in hardness and thus becomes superior in wear resistance. If the chromium content of the second phase is greater than 7 wt %, the sintered alloy used as the valve seat insert becomes strong in the property of damaging the valve. If it is lower than 1 wt %, it becomes inferior in wear resistance.
According to the first to fourth aspects of the present invention, the silicon content of each of the total of the sintered alloy and its first and second phases is adjusted to a range of from 0.1 to 0.6 wt %, as mentioned above. If it is greater than 0.6 wt %, the sintered alloy becomes low in hardness. If it is lower than 0.1 wt %, it becomes low in hardness, too, due to the inferior sinterability.
According to the first, second, fifth and sixth aspects of the present invention, the manganese content of each of the total of the sintered alloy and its first and second phases is adjusted to a range of from 0.1 to 0.6 wt %, as mentioned above. Due to this adjustment, the sintered alloy becomes high in hardness. If it is greater than 0.6 wt %, it becomes low in hardness, due to the inferior sinterability.
In the invention, the weight ratio of the second phase to the first phase in the sintered alloy is in a range of from 20:100 to 80:100. If it is lower than 20:100, the sintered alloy used as the valve seat insert becomes low in wear resistance. If it is greater than 80:100, it becomes strong in the property of damaging the valve.
According to the second aspect of the present invention, the vanadium content of the first phase of the sintered alloy is adjusted to a range of from 0.5 to 1.5 wt %. With this, the sintered alloy is further improved in corrosion resistance, and thus is superior in wear resistance under the use of leaded gasoline. If it is less than 0.5 wt %, the sintered alloy becomes low in wear resistance, due to insufficient corrosion resistance. If it is greater than 1.5 wt %, the sintered alloy used as the valve seat insert becomes strong in the property of damaging the valve.
As stated above, according to each of the fifth to eighth aspects of the present invention, the silicon content of each of the total of the sintered alloy and its first and second phases is adjusted to a range of from 0.6 to 5.0 wt %.
The following nonlimitative example is illustrative of the present invention.
EXAMPLE
At first, powders (G1-G113), each having an average particle diameter of from 20 to 150 .mu.m and a chemical composition as shown in Table 1, were prepared. Then, as shown in Table 2, each powder mixture was prepared by blending a powder for preparing the first phase, another powder for preparing the second phase, a graphite powder, and zinc stearate used as a lubricant, for 30 min, using a mixer. Then, each powder mixture was subjected to a pressure of 6.5 ton f/cm.sup.2, thereby to prepare a powder compact having an inner diameter of 20 mm, an outer diameter of 40 mm, and a thickness of 10 mm. After that, the powder compacts were sintered in an atmosphere of a destructive ammonia gas at 1180.degree. C. for 30 min, thereby to obtain sintered alloys having sample numbers of from 1 to 138 and chemical compositions as shown in Tables 3a-3m.
As shown in Table 6, each of the sintered alloys of sample nos. 4, 22, 58, 124, 46, 112, 63 and 129 was infiltrated with melted copper by putting a copper powder compact on each sintered alloy, then by keeping it in an atmosphere of a destructive ammonia gas at 1140.degree. C. for 30 min. Furthermore, each of these sintered alloys was impregnated with lead by immersing in a vacuum each sintered alloy into a lead melt heated at 550.degree. C., followed by a pressurization to 8 atmospheric pressure through an enclosure of nitrogen gas. Still furthermore, each of these sintered alloys was impregnated with an acrylic resin by a vacuum impregnation method, followed by curing in hot water heated at 100.degree. C. In Table 6, for example, sample nos. of 4, 4-Cu, 4-Pb, and 4-Resin respectively represent a sintered alloy of No. 4 with no impregnation, a sintered alloy of No. 4 impregnated with copper, that impregnated with lead, and that impregnated with an acrylic resin.
EVALUATION TESTS
A wear resistance test on the sintered alloys was conducted, as follows, in order to evaluate wear resistance of each sintered alloy. At first, the sintered alloys were formed into a shape of a valve seat insert of an internal combustion engine. In this test, each valve seat insert was installed on an exhaust port side of an internal combustion engine having in-line four cylinders with 16 valves and a displacement of 1,600 cc. These valves were made of SUH-36, and their valve faces were coated with stellite #32. The wear resistance test was conducted by operating the engine for 300 hr, with an engine rotation speed of 6,000 rpm, using an unleaded regular gasoline or a leaded gasoline. After the test, there was measured wear of each valve seat insert of the invention and of the corresponding valve.
A machinability test on the sintered alloys was conducted, as follows. In this test, outer surfaces of 50 pieces of each sintered alloy having an outer diameter of 40 mm and a thickness of 10 mm were cut by an Ohkuma-type lathe, with a rotation speed of 525 rpm, a machining stock of 0.5 mm, a running speed of 0.1 mm per revolution, and a super hard chip, without using any cutting oil. In this test, the maximum cutting force of the lathe was recorded as the result.
Radial crushing strength of each sintered alloy having an outer diameter of 40 mm, an inner diameter of 20 mm, and a thickness of 10 mm was determined with an autograph under a condition of a cross head speed of 0.5 mm/min.
The evaluation of compressibility of each powder mixture was conducted as follows. At first, each powder mixture was compacted under a load of 6 ton f, with an Amsler type testing machine, using a mold having a diameter of 11.3 mm. Then, the density of the powder compact was determined.
In each of FIGS. 1-26c, the numerals added in the graph represent the sample numbers of the sintered alloys.
The results of the above tests were interpreted as follows. As shown in FIG. 1 and the corresponding upper half of Table 4a, it was interpreted that the wear under the use of unleaded gasoline becomes sufficiently low by adjusting the tungsten content of the first phase to a range of from 3 to 7 wt %. Furthermore, as shown in FIG. 15 and the corresponding upper half of Table 4e, it was also interpreted that the wear under the use of leaded gasoline becomes sufficiently low by adjusting the tungsten content of the first phase to a range of from 3 to 7 wt %. As shown in FIG. 2 and the corresponding lower half of Table 4a, it was interpreted that the wear under the use of unleaded gasoline becomes sufficiently low by adjusting the tungsten content of the second phase to a range of from 3 to 15 wt %. Furthermore, as shown in FIG. 16 and the corresponding lower half of Table 4e, it was also interpreted that the wear under the use of leaded gasoline becomes sufficiently low by adjusting the tungsten content of the second phase to a range of from 3 to 15 wt %. As shown in FIG. 3 and the corresponding upper half of Table 4b, it was interpreted that the wear under the use of unleaded gasoline becomes sufficiently low by adjusting the vanadium content of the second phase to a range of from 2 to 7 wt %. Furthermore, as shown in FIG. 17 and the corresponding upper half of Table 4f, it was interpreted that the wear under the use of leaded gasoline becomes sufficiently low by adjusting the vanadium content of the second phase to a range of from 2 to 7 wt %. As shown in FIGS. 4 and 5 and the corresponding lower half of Table 4b, it was interpreted that the wear under the uses of unleaded and leaded gasolines becomes sufficiently low by adjusting the vanadium content of the first phase to a range of up to 1.5 wt %. As shown in FIG. 6 and the corresponding upper half of Table 4c, it was interpreted that the wear under the use of unleaded gasoline becomes sufficiently low by adjusting the chromium content of the second phase to a range of from 1 to 7 wt %. Furthermore, as shown in FIG. 18 and the corresponding lower half of Table 4f, it was interpreted that the wear under the use of leaded gasoline becomes sufficiently low by adjusting the chromium content of the second phase to a range of from 1 to 7 wt %. As shown in FIG. 7 and the corresponding lower half of Table 4c, it was interpreted that the wear under the use of unleaded gasoline becomes sufficiently low by adjusting the chromium content of the first phase to a range of up to 1 wt %. Furthermore, as shown in FIG. 19 and the corresponding upper half of Table 4g, it was interpreted that the wear under the use of leaded gasoline becomes sufficiently low by adjusting the chromium content of the first phase to a range of up to 1 wt %. As shown in FIG. 8 and the corresponding upper half of Table 4d, it was interpreted that the wear under the use of unleaded gasoline becomes sufficiently low by adjusting the weight ratio of the first phase to the second phase to a range of from 20:80 to 80:20. Furthermore, as shown in FIG. 20 and the corresponding lower half of Table 4g, it was also interpreted that the wear under the use of leaded gasoline becomes sufficiently low by adjusting the weight ratio of the first phase to the second phase to a range of from 20:80 to 80:20. As shown in FIGS. 9-10 and the corresponding upper half of Table 5a and FIGS. 21-22 and the corresponding upper half of Table 5d, it was interpreted that the wear resistance under the use of leaded gasoline and the radial crushing strength become sufficiently high by adjusting the silicon content of the first or second phase to a range of from 0.1 to 5.0 wt %. As shown in FIG. 11 and the corresponding lower half of Table 5a and FIG. 23 and the corresponding lower half of Table 5d, it was interpreted that the radial crushing strength becomes sufficiently high by adjusting the manganese content of the first or second phase to a range of from 0.1 to 0.6 wt %.
TABLE 1______________________________________Powder Powder Composition (wt %)No. Fe W V Cr Si Mn S C O______________________________________G1 Balance 0 0 0 0.3 0.3 0 0.6 0.3G2 Balance 2 0 0 0.3 0.3 0 0.6 0.3G3 Balance 3 0 0 0.3 0.3 0 0.6 0.3G4 Balance 5 0 0 0.3 0.3 0 0.6 0.3G5 Balance 7 0 0 0.3 0.3 0 0.6 0.3G6 Balance 8 0 0 0.3 0.3 0 0.6 0.3G7 Balance 10 0 0 0.3 0.3 0 0.6 0.3G8 Balance 5 0.5 0 0.3 0.3 0 0.6 0.3G9 Balance 5 1 0 0.3 0.3 0 0.6 0.3G10 Balance 5 1.5 0 0.3 0.3 0 0.6 0.3G11 Balance 5 2 0 0.3 0.3 0 0.6 0.3G12 Balance 5 5 0 0.3 0.3 0 0.6 0.3G13 Balance 5 0 0.9 0.3 0.3 0 0.6 0.3G14 Balance 5 0 1.4 0.3 0.3 0 0.6 0.3G15 Balance 5 0 4 0.3 0.3 0 0.6 0.3G16 Balance 5 0 0 0.05 0.3 0 0.6 0.3G17 Balance 5 0 0 0.1 0.3 0 0.6 0.3G18 Balance 5 0 0 0.6 0.3 0 0.6 0.3G19 Balance 5 0 0 0.7 0.3 0 0.6 0.3G20 Balance 5 0 0 2 0.3 0 0.6 0.3G21 Balance 5 0 0 5 0.3 0 0.6 0.3G22 Balance 5 0 0 7 0.3 0 0.6 0.3G23 Balance 5 0 0 0.3 0.05 0 0.6 0.3G24 Balance 5 0 0 0.3 0.1 0 0.6 0.3G25 Balance 5 0 0 0.3 0.2 0 0.6 0.3G26 Balance 5 0 0 0.3 0.6 0 0.6 0.3G27 Balance 5 0 0 0.3 0.7 0 0.6 0.3G28 Balance 5 0 0 0.3 1 0 0.6 0.3G29 Balance 5 0 0 0.3 0.05 0.03 0.6 0.3G30 Balance 5 0 0 0.3 0.1 0.07 0.6 0.3G31 Balance 5 0 0 0.3 0.2 0.13 0.6 0.3G32 Balance 5 0 0 0.3 0.3 0.2 0.6 0.3G33 Balance 5 0 0 0.3 0.6 0.4 0.6 0.3G34 Balance 5 0 0 0.3 0.7 0.47 0.6 0.3G35 Balance 5 0 0 0.3 1 0.67 0.6 0.3G36 Balance 5 0 0 0.3 1.5 1 0.6 0.3G37 Balance 0 5 4 0.3 0.3 0 0.6 0.3G38 Balance 2 5 4 0.3 0.3 0 0.6 0.3G39 Balance 3 5 4 0.3 0.3 0 0.6 0.3G40 Balance 7 5 4 0.3 0.3 0 0.6 0.3G41 Balance 12 5 4 0.3 0.3 0 0.6 0.3G42 Balance 15 5 4 0.3 0.3 0 0.6 0.3G43 Balance 16 5 4 0.3 0.3 0 0.6 0.3G44 Balance 18 5 4 0.3 0.3 0 0.6 0.3G45 Balance 12 0 4 0.3 0.3 0 0.6 0.3G46 Balance 12 1 4 0.3 0.3 0 0.6 0.3G47 Balance 12 2 4 0.3 0.3 0 0.6 0.3G48 Balance 12 7 4 0.3 0.3 0 0.6 0.3G49 Balance 12 8 4 0.3 0.3 0 0.6 0.3G50 Balance 12 10 4 0.3 0.3 0 0.6 0.3G51 Balance 12 5 0 0.3 0.3 0 0.6 0.3G52 Balance 12 5 1 0.3 0.3 0 0.6 0.3G53 Balance 12 2 2 0.3 0.3 0 0.6 0.3G54 Balance 12 7 7 0.3 0.3 0 0.6 0.3G55 Balance 12 8 8 0.3 0.1 0 0.6 0.3G56 Balance 12 10 10 0.3 0.2 0 0.6 0.3G57 Balance 12 5 4 0.05 0.3 0 0.6 0.3G58 Balance 12 5 4 0.1 0.3 0 0.6 0.3G59 Balance 12 5 4 0.6 0.3 0 0.6 0.3G60 Balance 12 5 4 0.7 0.3 0 0.6 0.3G61 Balance 12 5 4 2 0.3 0 0.6 0.3G62 Balance 12 5 4 5 0.3 0 0.6 0.3G63 Balance 12 5 4 7 0.3 0 0.6 0.3G64 Balance 12 5 4 0.3 0.05 0 0.6 0.3G65 Balance 12 5 4 0.3 0.1 0 0.6 0.3G66 Balance 12 5 4 0.3 0.2 0 0.6 0.3G67 Balance 12 5 4 0.3 0.6 0 0.6 0.3G68 Balance 12 5 4 0.3 0.7 0 0.6 0.3G69 Balance 12 5 4 0.3 1 0 0.6 0.3G70 Balance 12 5 4 0.3 0.05 0.03 0.6 0.3G71 Balance 12 5 4 0.3 0.1 0.07 0.6 0.3G72 Balance 12 5 4 0.3 0.2 0.13 0.6 0.3G73 Balance 12 5 4 0.3 0.3 0.2 0.6 0.3G74 Balance 12 5 4 0.3 0.6 0.4 0.6 0.3G75 Balance 12 5 4 0.3 0.7 0.47 0.6 0.3G76 Balance 12 5 4 0.3 1 0.67 0.6 0.3G77 Balance 12 5 4 0.3 1.5 1 0.6 0.3G78 Balance 0 1 0 0.3 0.3 0 0.6 0.3G79 Balance 2 1 0 0.3 0.3 0 0.6 0.3G80 Balance 3 1 0 0.3 0.3 0 0.6 0.3G81 Balance 7 1 0 0.3 0.3 0 0.6 0.3G82 Balance 8 1 0 0.3 0.3 0 0.6 0.3G83 Balance 10 1 0 0.3 0.3 0 0.6 0.3G84 Balance 5 1 0.9 0.3 0.3 0 0.6 0.3G85 Balance 5 1 1.4 0.3 0.3 0 0.6 0.3G86 Balance 5 1 4 0.3 0.3 0 0.6 0.3G87 Balance 5 1 0 0.05 0.3 0 0.6 0.3G88 Balance 5 1 0 0.1 0.3 0 0.6 0.3G89 Balance 5 1 0 0.6 0.3 0 0.6 0.3G90 Balance 5 1 0 0.7 0.3 0 0.6 0.3G91 Balance 5 1 0 2 0.3 0 0.6 0.3G92 Balance 5 1 0 5 0.3 0 0.6 0.3G93 Balance 5 1 0 7 0.3 0 0.6 0.3G94 Balance 5 1 0 0.3 0.05 0 0.6 0.3G95 Balance 5 1 0 0.3 0.1 0 0.6 0.3G96 Balance 5 1 0 0.3 0.2 0 0.6 0.3G97 Balance 5 1 0 0.3 0.6 0 0.6 0.3G98 Balance 5 1 0 0.3 0.7 0 0.6 0.3G99 Balance 5 1 0 0.3 1 0 0.6 0.3G100 Balance 5 1 0 0.3 0.05 0.03 0.6 0.3G101 Balance 5 1 0 0.3 0.1 0.07 0.6 0.3G102 Balance 5 1 0 0.3 0.2 0.13 0.6 0.3G103 Balance 5 1 0 0.3 0.3 0.2 0.6 0.3G104 Balance 5 1 0 0.3 0.6 0.4 0.6 0.3G105 Balance 5 1 0 0.3 0.7 0.47 0.6 0.3G106 Balance 5 1 0 0.3 1 0.67 0.6 0.3G107 Balance 5 1 0 0.3 1.5 1 0.6 0.3G108 Balance 5 0 0 2 0.3 0.2 0.6 0.3G109 Balance 5 1 0 2 0.3 0.2 0.6 0.3G110 Balance 12 5 4 2 0.3 0.2 0.6 0.3G111 Balance of Fe, 6.5 wt % Co, 1.5 wt % Ni, and 1.5 wt % MoG112 Balance of Co, 28 wt % Mo, 8.5 wt % Cr, and 2.5 wt % SiG113 MnS Powder______________________________________
TABLE 2______________________________________ Powder Mixture Composition (parts by weight) Gra- Lubri- Powder Powder phite cant MnSSample for 1st for 2nd Pow- (Zinc Pow-No. Phase Phase der Stearate) der______________________________________W cont.in 1stPhase(wt %)0 1 G1 (50) G41 (50) 0.85 0.5 --2 2 G2 (50) G41 (50) 0.86 0.5 --3 3 G3 (50) G41 (50) 0.87 0.5 --5 4 G4 (50) G41 (50) 0.88 0.5 --7 5 G5 (50) G41 (50) 0.89 0.5 --8 6 G6 (50) G41 (50) 0.89 0.5 --10 7 G7 (50) G41 (50) 0.90 0.5 --W cont. in2nd Phase(wt %)0 8 G4 (50) G37 (50) 0.82 0.5 --2 9 G4 (50) G38 (50) 0.83 0.5 --3 10 G4 (50) G39 (50) 0.83 0.5 --7 11 G4 (50) G40 (50) 0.85 0.5 --12 4 G4 (50) G41 (50) 0.88 0.5 --15 12 G4 (50) G42 (50) 0.89 0.5 --16 13 G4 (50) G43 (50) 0.90 0.5 --18 14 G4 (50) G44 (50) 0.91 0.5 --V cont. in2nd Phase(wt %)0 15 G4 (50) G45 (50) 0.59 0.5 --1 16 G4 (50) G46 (50) 0.64 0.5 --2 17 G4 (50) G47 (50) 0.70 0.5 --5 4 G4 (50) G41 (50) 0.88 0.5 --7 18 G4 (50) G48 (50) 0.99 0.5 --8 19 G4 (50) G49 (50) 1.05 0.5 --V cont. in.2nd Phase(wt %)10 20 G4 (50) G50 (50) 1.17 0.5 --V cont. in1st Phase(wt %)0 4 G4 (50) G41 (50) 0.88 0.5 --0.5 21 G8 (50) G41 (50) 0.90 0.5 --1 22 G9 (50) G41 (50) 0.93 0.5 --1.5 23 G10 (50) G41 (50) 0.96 0.5 --2 24 G11 (50) G41 (50) 0.99 0.5 --5 25 G12 (50) G41 (50) 1.17 0.5 --Cr cont. in2nd Phase(wt %)0 26 G4 (50) G51 (50) 0.88 0.5 --1 27 G4 (50) G52 (50) 0.88 0.5 --2 28 G4 (50) G53 (50) 0.88 0.5 --4 4 G4 (50) G41 (50) 0.88 0.5 --7 29 G4 (50) G54 (50) 0.88 0.5 --8 30 G4 (50) G55 (50) 0.88 0.5 --10 31 G12 (50) G56 (50) 0.88 0.5 --Cr cont.in 1stPhase(wt %)0 4 G4 (50) G41 (50) 0.88 0.5 --0.9 32 G13 (50) G41 (50) 0.88 0.5 --1.4 33 G14 (50) G41 (50) 0.88 0.5 --4 34 G1S (50) G41 (50) 0.88 0.5 --4 35 G1S (50) G51 (50) 0.88 0.5 --Ratio of 1stPhase to 2ndPhase by wt.100:0 36 G4 -- 0.55 0.5 --90:10 37 G4 G41 0.62 0.5 --80:20 38 G4 G41 0.68 0.5 --50:50 4 G4 G41 0.88 0.5 --20:80 39 G4 G41 1.07 0.5 --10:90 40 G4 G41 1.14 0.5 --0:100 41 -- G41 1.20 0.5 --Com. G111 (84.15), G112 0.85 0.5 --Sam- (15), and Stampedple A Lead Powder (2)Si cont.in 1st or 2ndPhase (wt %)0.05 42 G16 (50) G57 (50) 0.88 0.5 --0.1 43 G17 (50) G58 (50) 0.88 0.5 --0.3 4 G4 (50) G41 (50) 0.88 0.5 --0.6 44 G18 (50) G59 (50) 0.88 0.5 --0.7 45 G19 (50) G60 (50) 0.88 0.5 --2 46 G20 (50) G61 (50) 0.88 0.5 --5 47 G21 (50) G62 (50) 0.88 0.5 --7 48 G22 (50) G63 (50) 0.88 0.5 --Mn cont.in 1st or 2ndPhase (wt %)0.05 49 G23 (50) G64 (50) 0.88 0.5 --0.1 50 G24 (50) G65 (50) 0.88 0.5 --0.2 51 G25 (50) G66 (50) 0.88 0.5 --0.3 4 G4 (50) G41 (50) 0.88 0.5 --0.6 52 G26 (50) G67 (50) 0.88 0.5 --0.7 53 G27 (50) G68 (50) 0.88 0.5 --1 54 G28 (50) G69 (50) 0.88 0.5 --PrecipitatedMnS cont.in 1st or 2ndPhase (wt %)0.08 55 G29 (50) G70 (50) 0.88 0.5 --0.17 56 G30 (50) G71 (50) 0.88 0.5 --0.33 57 G31 (50) G72 (50) 0.88 0.5 --0.5 58 G32 (50) G73 (50) 0.88 0.5 --1 59 G33 (50) G74 (50) 0.88 0.5 --1.17 60 G34 (50) G75 (50) 0.88 0.5 --1.67 61 G35 (50) G76 (50) 0.88 0.5 --2.5 62 G36 (50) G77 (50) 0.88 0.5 --(MnS + Si)cont. in 1stor2nd Phase(wt %)0.3 4 G4 (50) G41 (50) 0.88 0.5 --2.5 63 G108 (50) G110 (50) 0.88 0.5 --MnS Powder(parts byweight)0 4 G4 (50) G41 (50) 0.88 0.5 00.1 64 0.10.2 65 0.20.3 66 0.30.5 67 0.51.0 68 1.01.2 69 1.21.6 70 1.62.5 71 2.5MnSPowder &Si in 1stand 2ndPhases(parts bywt.)0.3 4 G4 (50) G41 (50) 0.88 0.5 02.5 72 G20 (50) G61 (50) 0.88 0.5 0.5W cont.in 1stPhase(wt %)0 73 G78 (50) G41 (50) 0.91 0.5 --2 74 G79 (50) G41 (50) 0.92 0.5 --3 75 G80 (50) G41 (50) 0.92 0.5 --5 22 G9 (50) G41 (50) 0.93 0.5 --7 76 G81 (50) G44 (50) 0.94 0.5 --8 77 G82 (50) G41 (50) 0.95 0.5 --10 78 G83 (50) G41 (50) 0.96 0.5 --W cont.in 2ndPhase(wt %)0 79 G9 (50) G37 (50) 0.87 0.5 --2 80 G9 (50) G38 (50) 0.88 0.5 --3 81 G9 (50) G39 (50) 0.89 0.5 --7 82 G9 (50) G40 (50) 0.91 0.5 --12 22 G9 (50) G41 (50) 0.93 0.5 --15 83 G9 (50) G42 (50) 0.95 0.5 --16 84 G9 (50) G43 (50) 0.95 0.5 --18 85 G9 (50) G44 (50) 0.96 0.5 --V cont.in 2ndPhase(wt %)0 86 G9 (50) G45 (50) 0.64 0.5 --1 87 G9 (50) G46 (50) 0.70 0.5 --2 88 G9 (50) G47 (50) 0.76 0.5 --5 22 G9 (50) G41 (50) 0.93 0.5 --7 89 G9 (50) G48 (50) 1.05 0.5 --8 90 G9 (50) G49 (50) 1.11 0.5 --10 91 G9 (50) GSO (50) 1.22 0.5 --Cr cont.in 2ndPhase(wt %)0 92 G9 (50) G51 (50) 0.93 0.5 --1 93 G9 (50) G52 (50) 0.93 0.5 --2 94 G9 (50) G53 (50) 0.93 0.5 --4 22 G9 (50) G41 (50) 0.93 0.5 --7 95 G9 (50) G54 (50) 0.93 0.5 --8 96 G9 (50) G55 (50) 0.93 0.5 --10 97 G9 (50) G56 (50) 0.93 0.5 --Cr cont.in 1stPhase(wt %)0.2 22 G9 (50) G41 (50) 0.93 0.5 --1 98 G84 (50) G41 (50) 0.93 0.5 --1.5 99 G85 (50) G41 (50) 0.93 0.5 --4 100 G86 (50) G41 (50) 0.93 0.5 --4 101 G86 (50) G51 (50) 0.93 0.5 --Ratio of 1stPhase to 2ndPhase by wt.100:0 102 G9 -- 0.57 0.5 --90:10 103 G9 G41 0.72 0.5 --80:20 104 G9 G41 0.77 0.5 --50:50 22 G9 G41 0.93 0.5 --20:80 105 G9 G41 1.09 0.5 --10:90 106 G9 G41 1.15 0.5 --0:100 107 -- G41 1.20 0.5 --Si cont.in 1st or 2ndPhase (wt %)0.05 108 G87 (50) G57 (50) 0.93 0.5 --0.1 109 G88 (50) G58 (50) 0.93 0.5 --0.3 22 G9 (50) G41 (50) 0.93 0.5 --0.6 110 G89 (50) G59 (50) 0.93 0.5 --0.7 111 G90 (50) G60 (50) 0.93 0.5 --2 112 G91 (50) G61 (50) 0.93 0.5 --5 113 G92 (50) G62 (50) 0.93 0.5 --7 114 G93 (50) G63 (50) 0.93 0.5 --Mn cont.in 1st or 2ndPhase (wt %)0.05 115 G94 (50) G64 (50) 0.93 0.5 --0.1 116 G95 (50) G65 (50) 0.93 0.5 --0.2 117 G96 (50) G66 (50) 0.93 0.5 --0.3 22 G9 (50) G41 (50) 0.93 0.5 --0.6 118 G97 (50) G67 (50) 0.93 0.5 --0.7 119 G98 (50) G68 (50) 0.93 0.5 --1 120 G99 (50) G69 (50) 0.93 0.5 --PrecipitatedMnS cont.in 1st or 2ndPhase (wt %)0.08 121 G100 (50) G70 (50) 0.93 0.5 --0.17 122 G101 (50) G71 (50) 0.93 0.5 --0.33 123 G102 (50) G72 (50) 0.93 0.5 --0.5 124 G103 (50) G73 (50) 0.93 0.5 --1 125 G104 (50) G74 (50) 0.93 0.5 --1.17 126 G105 (50) G75 (50) 0.93 0.5 --1.67 127 G106 (50) G76 (50) 0.93 0.5 --2.5 128 G107 (50) G77 (50) 0.93 0.5 --(MnS + Si)cont. in 1stor 2nd Phase(wt %)0.3 22 G9 (50) G41 (50) 0.93 0.5 --2.5 129 G109 (50) G110 (50) 0.93 0.5 --MnS Powder(parts byweight)0 22 G9 (50) G41 (50) 0.93 0.5 00.1 130 0.10.2 131 0.20.3 132 0.30.5 133 0.51.0 134 1.01.2 135 1.21.6 136 1.62.5 137 2.5MnSPowder &Si in 1stand 2ndPhases(parts bywt.)0.3 22 G9 (50) G41 (50) 0.93 0.5 02.5 138 G91 (50) G61 (50) 0.93 0.5 0.5______________________________________
TABLE 3a__________________________________________________________________________ Sam- Sintered Alloy Composition (wt %) ple First Phase Second Phase Total No. Fe W V Cr Si Mn S Fe W V Cr Si Mn S C__________________________________________________________________________W cont. in 1stPhase (wt %)0 1 Bal. 0 0 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.152 2 Bal. 2 0 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.163 3 Bal. 3 0 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.175 4 Bal. 5 0 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.187 5 Bal. 7 0 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.198 6 Bal. 8 0 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.1910 7 Bal. 10 0 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.20W cont. in2nd Phase(wt %)0 8 Bal. 5 0 0.2 0.3 0.3 0 Bal. 0 5 4 0.3 0.3 0 1.122 9 Bal. 5 0 0.2 0.3 0.3 0 Bal. 2 5 4 0.3 0.3 0 1.133 10 Bal. 5 0 0.2 0.3 0.3 0 Bal. 3 5 4 0.3 0.3 0 1.137 11 Bal. 5 0 0.2 0.3 0.3 0 Bal. 7 5 4 0.3 0.3 0 1.1512 4 Bal. 5 0 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.1815 12 Bal. 5 0 0.2 0.3 0.3 0 Bal. 15 5 4 0.3 0.3 0 1.1916 13 Bal. 5 0 0.2 0.3 0.3 0 Bal. 16 5 4 0.3 0.3 0 1.2018 14 Bal. 5 0 0.2 0.3 0.3 0 Bal. 18 5 4 0.3 0.3 0 1.21__________________________________________________________________________
TABLE 3b__________________________________________________________________________ Sam- Sintered Alloy Composition (wt %) ple First Phase Second Phase Total No. Fe W V Cr Si Mn S Fe W V Cr Si Mn S C__________________________________________________________________________V cont. in 2ndPhase (wt %)0 15 Bal. 5 0 0.2 0.3 0.3 0 Bal. 12 0 4 0.3 0.3 0 0.891 16 Bal. 5 0 0.2 0.3 0.3 0 Bal. 12 1 4 0.3 0.3 0 0.942 17 Bal. 5 0 0.2 0.3 0.3 0 Bal. 12 2 4 0.3 0.3 0 1.005 4 Bal. 5 0 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.187 18 Bal. 5 0 0.2 0.3 0.3 0 Bal. 12 7 4 0.3 0.3 0 1.298 19 Bal. 5 0 0.2 0.3 0.3 0 Bal. 12 8 4 0.3 0.3 0 1.3510 20 Bal. 5 0 0.2 0.3 0.3 0 Bal. 12 10 4 0.3 0.3 0 1.47V cont. in 1stPhase (wt %)0 4 Bal. 5 0 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.8 0 1.180.5 21 Bal. 5 0.5 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.201 22 Bal. 5 1 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.231.5 23 Bal. 5 1.5 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.262 24 Bal. 5 2 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.295 25 Bal. 5 5 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.47__________________________________________________________________________
TABLE 3c__________________________________________________________________________ Sam- Sintered Alloy Composition (wt %) ple First Phase Second Phase Total No. Fe W V Cr Si Mn S Fe W V Cr Si Mn S C__________________________________________________________________________Cr cont. in2nd Phase(wt %)0 26 Bal. 5 0 0 0.3 0.3 0 Bal. 12 5 0 0.3 0.3 0 1.181 27 Bal. 5 0 0.05 0.3 0.3 0 Bal. 12 5 1 0.3 0.3 0 1.182 28 Bal. 5 0 0.1 0.3 0.3 0 Bal. 12 5 2 0.3 0.3 0 1.184 4 Bal. 5 0 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.187 29 Bal. 5 0 0.35 0.3 0.3 0 Bal. 12 5 7 0.3 0.3 0 1.188 30 Bal. 5 0 0.4 0.3 0.3 0 Bal. 12 5 8 0.3 0.3 0 1.1810 31 Bal. 5 0 0.s 0.3 0.3 0 Bal. 12 5 10 0.3 0.3 0 1.15Cr cont. in1st Phase(wt %)0 4 Bal. 5 0 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.180.9 32 Bal. 5 0 1 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.181.4 33 Bal. 5 0 1.5 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.184 34 Bal. 5 0 4 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.184 35 Bal. 5 0 4 0.3 0.3 0 Bal. 12 5 0.2 0.3 0.3 0 1.18__________________________________________________________________________
TABLE 3d__________________________________________________________________________ Sam- Sintered Alloy Composition (wt %) ple First Phase Second Phase Total No. Fe W V Cr Si Mn S Fe W V Cr Si Mn S C__________________________________________________________________________Ratio of 1stPhase to 2ndPhase by wt.100:0 36 Bal. 5 0 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 0.8590:10 37 Bal. 5 0 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 0.9280:20 38 Bal. 5 0 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 0.9850:50 4 Bal. 5 0 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.1820:80 39 Bal. 5 0 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.3710:90 40 Bal. 5 0 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.440:100 41 Bal. 5 0 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.50Comparative Fe-6.5Co-1.5Ni-1.5Mo-0.6Pb + 15%Co-28Mo-8.5Cr-2.5Si, with Pb impregnationSample A__________________________________________________________________________
TABLE 3e__________________________________________________________________________ Sam- Sintered Alloy Composition (wt %) ple First Phase Second Phase Total No. Fe W V Cr Si Mn S Fe W V Cr Si Mn S C__________________________________________________________________________Si cont. in 1stor 2nd Phase(wt %)0.05 42 Bal. 5 0 0.2 0.05 0.3 0 Bal. 12 5 4 0.05 0.3 0 1.180.1 43 Bal. 5 0 0.2 0.1 0.3 0 Bal. 12 5 4 0.1 0.3 0 1.180.3 4 Bal. 5 0 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.180.6 44 Bal. 5 0 0.2 0.6 0.3 0 Bal. 12 5 4 0.6 0.3 0 1.180.7 45 Bal. 5 0 0.2 0.7 0.3 0 Bal. 12 5 4 0.7 0.3 0 1.182 46 Bal. 5 0 0.2 2 0.3 0 Bal. 12 5 4 2 0.3 0 1.185 47 Bal. 5 0 0.2 5 0.3 0 Bal. 12 5 4 5 0.3 0 1.187 48 Bal. 5 0 0.2 7 0.3 0 Bal. 12 5 4 7 0.3 0 1.18Mn cont. in1st or 2ndPhase (wt %)0.05 49 Bal. 5 0 0.2 0.3 0.05 0 Bal. 12 5 4 0.3 0.05 0 1.180.1 50 Bal. 5 0 0.2 0.3 0.1 0 Bal. 12 5 4 0.3 0.1 0 1.180.2 51 Bal. 5 0 0.2 0.3 0.2 0 Bal. 12 5 4 0.3 0.2 0 1.180.3 4 Bal. 5 0 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.180.6 52 Bal. 5 0 0.2 0.3 0.6 0 Bal. 12 5 4 0.3 0.6 0 1.180.7 53 Bal. 5 0 0.2 0.3 0.7 0 Bal. 12 5 4 0.3 0.7 0 1.181 54 Bal. 5 0 0.2 0.3 1 0 Bal. 12 5 4 0.3 1 0 1.18__________________________________________________________________________
TABLE 3f__________________________________________________________________________ Sam- Sintered Alloy Composition (wt %) ple First Phase Second Phase Total No. Fe W V Cr Si Mn S Fe W V Cr Si Mn S C__________________________________________________________________________PrecipitatedMnS cont.in 1st or 2ndPhase (wt %)0.08 55 Bal. 5 0 0.2 0.3 0.05 0.03 Bal. 12 5 4 0.3 0.05 0.03 1.180.17 56 Bal. 5 0 0.2 0.3 0.1 0.07 Bal. 12 5 4 0.3 0.1 0.07 1.180.33 57 Bal. 5 0 0.2 0.3 0.2 0.13 Bal. 12 5 4 0.3 0.2 0.13 1.180.5 58 Bal. 5 0 0.2 0.3 0.3 0.2 Bal. 12 5 4 0.3 0.3 0.2 1.181 59 Bal. 5 0 0.2 0.3 0.6 0.4 Bal. 12 5 4 0.3 0.6 0.4 1.181.17 60 Bal. 5 0 0.2 0.3 0.7 0.47 Bal. 12 5 4 0.3 0.7 0.47 1.181.67 61 Bal. 5 0 0.2 0.3 1 0.67 Bal. 12 5 4 0.3 1 0.67 1.182.5 62 Bal. 5 0 0.2 0.3 1.5 1 Bal. 12 5 4 0.3 1.5 1 1.18PrecipitatedMnS + Si)cont. in 1st or2nd Phase(wt %)0.3 4 Bal. 5 0 0.2 0.3 0.05 0 Bal. 12 5 4 0.3 0.05 0 1.182.5 63 Bal. 5 0 0.2 0.3 0.1 0 Bal. 12 5 4 0.3 0.1 0 1.18__________________________________________________________________________
TABLE 3g__________________________________________________________________________ Sam- Sintered Alloy Composition (wt %) ple First Phase Second Phase Total No. Fe W V Cr Si Mn S Fe W V Cr Si Mn S C__________________________________________________________________________Added MnSPowder (partsby weight)0 4 Bal. 5 0 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.180.1 64 Bal. 5 0 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.180.2 65 Bal. 5 0 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.180.3 66 Bal. 5 0 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.180.5 67 Bal. 5 0 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.181.0 68 Bal. 5 0 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.181.2 69 Bal. 5 0 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.181.6 70 Bal. 5 0 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.182.5 71 Bal. 5 0 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.18Added MnSPowder & Si in1st and 2ndPhases(parts by wt.)0.3 4 Bal. 5 0 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.182.5 72 Bal. 5 0 0.2 2 0.3 0 Bal. 12 5 4 2 0.3 0 1.18__________________________________________________________________________
TABLE 3h__________________________________________________________________________ Sam- Sintered Alloy Composition (wt %) ple First Phase Second Phase Total No. Fe W V Cr Si Mn S Fe W V Cr Si Mn S C__________________________________________________________________________W cont. in 1stPhase (wt %)0 73 Bal. 0 1 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.212 74 Bal. 2 1 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.223 75 Bal. 3 1 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.225 22 Bal. 5 1 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.237 76 Bal. 7 1 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.248 77 Bal. 8 1 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.2510 78 Bal. 10 1 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.26W cont. in 2ndPhase (wt %)0 79 Bal. 5 1 0.2 0.3 0.3 0 Bal. 0 5 4 0.3 0.3 0 1.172 80 Bal. 5 1 0.2 0.3 0.3 0 Bal. 2 5 4 0.3 0.3 0 1.183 81 Bal. 5 1 0.2 0.3 0.3 0 Bal. 3 5 4 0.3 0.3 0 1.197 82 Bal. 5 1 0.2 0.3 0.3 0 Bal. 7 5 4 0.3 0.3 0 1.2112 22 Bal. 5 1 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.2315 83 Bal. 5 1 0.2 0.3 0.3 0 Bal. 15 5 4 0.3 0.3 0 1.2516 84 Bal. 5 1 0.2 0.3 0.3 0 Bal. 16 5 4 0.3 0.3 0 1.2518 85 Bal. 5 1 0.2 0.3 0.3 0 Bal. 18 5 4 0.3 0.3 0 1.26__________________________________________________________________________
TABLE 3i__________________________________________________________________________ Sam- Sintered Alloy Composition (wt %) ple First Phase Second Phase Total No. Fe W V Cr Si Mn S Fe W V Cr Si Mn S C__________________________________________________________________________V cont. in 2ndPhase (wt %)0 86 Bal. 5 1 0.2 0.3 0.3 0 Bal. 12 0 4 0.3 0.3 0 0.941 87 Bal. 5 1 0.2 0.3 0.3 0 Bal. 12 1 4 0.3 0.3 0 1.002 88 Bal. 5 1 0.2 0.3 0.3 0 Bal. 12 2 4 0.3 0.3 0 1.065 22 Bal. 5 1 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.237 89 Bal. 5 1 0.2 0.3 0.3 0 Bal. 12 7 4 0.3 0.3 0 1.358 90 Bal. 5 1 0.2 0.3 0.3 0 Bal. 12 8 4 0.3 0.3 0 1.4110 91 Bal. 5 1 0.2 0.3 0.3 0 Bal. 12 10 4 0.3 0.3 0 1.52Cr cont. in 2ndPhase (wt %)0 92 Bal. 5 1 0 0.3 0.3 0 Bal. 12 5 0 0.3 0.3 0 1.231 93 Bal. 5 1 0.05 0.3 0.3 0 Bal. 12 5 1 0.3 0.3 0 1.232 94 Bal. 5 1 0.1 0.3 0.3 0 Bal. 12 5 2 0.3 0.3 0 1.234 22 Bal. 5 1 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.237 95 Bal. 5 1 0.35 0.3 0.3 0 Bal. 12 5 7 0.3 0.3 0 1.238 96 Bal. 5 1 0.4 0.3 0.3 0 Bal. 12 5 8 0.3 0.3 0 1.2310 97 Bal. 5 1 0.5 0.3 0.3 0 Bal. 12 5 10 0.3 0.3 0 1.23__________________________________________________________________________
TABLE 3j__________________________________________________________________________ Sam- Sintered Alloy Composition (wt %) ple First Phase Second Phase Total No. Fe W V Cr Si Mn S Fe W V Cr Si Mn S C__________________________________________________________________________Cr cont. in 1stPhase (wt %)0.2 22 Bal. 5 1 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.231 98 Bal. 5 1 1 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.231.5 99 Bal. 5 1 1.5 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.234 100 Bal. 5 1 4 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.234 101 Bal. 5 1 4 0.3 0.3 0 Bal. 12 5 0 0.3 0.3 0 1.23Ratio of 1stPhase to 2ndPhase by wt.100:0 102 Bal. 5 1 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 0.9790:10 103 Bal. 5 1 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.0280:20 104 Bal. 5 1 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.0750:50 22 Bal. 5 1 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.2320:80 105 Bal. 5 1 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.3910:90 106 Bal. 5 1 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.450:100 107 Bal. 5 1 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.50__________________________________________________________________________
TABLE 3k__________________________________________________________________________ Sam- Sintered Alloy Composition (wt %) ple First Phase Second Phase No. Fe W V Cr Si Mn S Fe W V Cr Si Mn S C__________________________________________________________________________Si cont. in 1stor 2nd Phase(wt %)0.05 108 Bal. 5 1 0.2 0.05 0.3 0 Bal. 12 5 4 0.05 0.3 0 1.230.1 109 Bal. 5 1 0.2 0.1 0.3 0 Bal. 12 5 4 0.1 0.3 0 1.230.3 22 Bal. 5 1 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.230.6 110 Bal. 5 1 0.2 0.6 0.3 0 Bal. 12 5 4 0.6 0.3 0 1.230.7 111 Bal. 5 1 0.2 0.7 0.3 0 Bal. 12 5 4 0.7 0.3 0 1.232 112 Bal. 5 1 0.2 2 0.3 0 Bal. 12 5 4 2 0.3 0 1.235 113 Bal. 5 1 0.2 5 0.3 0 Bal. 12 5 4 5 0.3 0 1.237 114 Bal. 5 1 0.2 7 0.3 0 Bal. 12 5 4 7 0.3 0 1.23Mn cont. in 1stor 2nd Phase(wt %)0.05 115 Bal. 5 1 0.2 0.3 0.05 0 Bal. 12 5 4 0.3 0.05 0 1.230.1 116 Bal. 5 1 0.2 0.3 0.1 0 Bal. 12 5 4 0.3 0.1 0 1.230.2 117 Bal. 5 1 0.2 0.3 0.2 0 Bal. 12 5 4 0.3 0.2 0 1.230.3 22 Bal. 5 1 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.230.6 118 Bal. 5 1 0.2 0.3 0.6 0 Bal. 12 5 4 0.3 0.6 0 1.230.7 119 BaI. 5 1 0.2 0.3 0.7 0 Bal. 12 5 4 0.3 0.7 0 1.231 120 Bal. 5 1 0.2 0.3 1 0 Bal. 12 5 4 0.3 1 0 1.23__________________________________________________________________________
TABLE 3l__________________________________________________________________________ Sam- Sintered Alloy Composition (wt %) ple First Phase Second Phase No. Fe W V Cr Si Mn S Fe W V Cr Si Mn S C__________________________________________________________________________PrecipitatedMnS cont. in1st or 2ndPhase (wt %)0.08 121 Bal. 5 1 0.2 0.3 0.05 0.03 Bal. 12 5 4 0.3 0.05 0.03 1.230.17 122 Bal. 5 1 0.2 0.3 0.1 0.07 Bal. 12 5 4 0.3 0.1 0.07 1.230.33 123 Bal. 5 1 0.2 0.3 0.2 0.13 Bal. 12 5 4 0.3 0.2 0.13 1.230.5 124 Bal. 5 1 0.2 0.3 0.3 0.2 Bal. 12 5 4 0.3 0.3 0.2 1.231 125 Bal. 5 1 0.2 0.3 0.6 0.4 Bal. 12 5 4 0.3 0.6 0.4 1.231.17 126 Bal. 5 1 0.2 0.3 0.7 0.47 Bal. 12 5 4 0.3 0.7 0.47 1.231.67 127 Bal. 5 1 0.2 0.3 1 0.67 Bal. 12 5 4 0.3 1 0.67 1.232.5 128 Bal. 5 1 0.2 0.3 1.5 1 Bal. 12 5 4 0.3 1.5 1 1.23(PrecipitatedMnS + Si)cont.in 1st or 2ndPhase (wt %)0.3 22 Bal. 5 1 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.232.5 129 Bal. 5 1 0.2 2 0.3 0.2 Bal. 12 5 4 2 0.3 0.2 1.23__________________________________________________________________________
TABLE 3m__________________________________________________________________________ Sam- Sintered Alloy Composition (wt %) ple First Phase Second Phase No. Fe W V Cr Si Mn S Fe W V Cr Si Mn S C__________________________________________________________________________Added MnSPowder (partsby weight)0 22 Bal. 5 1 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.230.1 130 Bal. 5 1 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.230.2 131 Bal. 5 1 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.230.3 132 Bal. 5 1 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.230.5 133 Bal. 5 1 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.231.0 134 Bal. 5 1 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.231.2 135 Bal. 5 1 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.231.6 136 Bal. 5 1 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.232.5 137 Bal. 5 1 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.23Added MnSPowder & Si in1st and 2ndPhases(parts by wt.)0.3 22 Bal. 5 1 0.2 0.3 0.3 0 Bal. 12 5 4 0.3 0.3 0 1.232.5 138 Bal. 5 1 0.2 2 0.3 0 Bal. 12 5 4 2 0.3 0 1.23__________________________________________________________________________
TABLE 4a__________________________________________________________________________ Wear in Unleaded Gasoline Test (.mu.m) Sam- 1st Phase 2nd Phase Valve Seat ple No. (wt %) (wt %) Insert Valve Total__________________________________________________________________________W cont. in 1stPhase (wt %)0 1 50 50 130 5 1352 2 50 50 80 25 1053 3 50 50 60 20 805 4 50 50 40 24 647 5 50 50 70 28 988 6 50 50 78 36 11410 7 50 50 95 55 150W cont. in 2ndPhase (wt %)0 8 50 50 120 5 1252 9 50 50 96 29 1253 10 50 50 82 11 937 11 50 50 45 18 6312 4 50 50 40 24 6415 12 50 50 67 28 9516 13 50 50 79 44 12318 14 50 50 88 76 164__________________________________________________________________________
TABLE 4b__________________________________________________________________________ Wear in Unleaded Gasoline Test (.mu.m) Wear in Leaded Gasoline Test (.mu.m) Sam- 1st Phase 2nd Phase Valve Seat Valve Seat ple No. (wt %) (wt %) Insert Valve Total Insert Valve Total__________________________________________________________________________V cont. in 2ndPhase (wt %)0 15 50 50 244 2 246 -- -- --1 16 50 50 125 5 130 -- -- --2 17 50 50 67 11 78 -- -- --5 4 50 50 40 24 64 -- -- --7 18 50 50 33 56 89 -- -- --8 19 50 50 58 89 147 -- -- --10 20 50 50 98 148 246 -- -- --V cont. in 1stPhase (wt %)0 4 50 50 40 24 64 58 38 960.5 21 50 50 45 28 73 38 25 631 22 50 50 55 31 86 14 28 421.5 23 50 50 59 35 94 28 35 632 24 50 50 68 58 126 55 48 1035 25 50 50 210 268 478 87 102 189__________________________________________________________________________
TABLE 4c__________________________________________________________________________ Wear in Unleaded Gasoline Test (.mu.m) Sam- 1st Phase 2nd Phase Valve Seat ple No. (wt %) (wt %) Insert Valve Total__________________________________________________________________________Cr cont. in 2ndPhase (wt %)0 26 50 50 140 32 1721 27 50 50 97 28 1252 28 50 50 58 18 764 4 50 50 40 24 647 29 50 50 35 38 738 30 50 50 55 59 11410 31 50 50 89 78 167Cr cont. in 1stPhase (wt %)0 4 50 50 40 24 640.9 32 50 50 55 35 901.4 33 50 50 88 33 1214 34 50 50 245 167 4124 35 50 50 125 43 168__________________________________________________________________________
TABLE 4d__________________________________________________________________________ Wear in Unleaded Gasoline Test (.mu.m) Wear in Leaded Gasoline Test (.mu.m) Sam- Valve Seat Valve Seat ple No. Insert Valve Total Insert Valve Total__________________________________________________________________________Ratio of 1st Phaseto 2nd Phase by wt.100:0 36 342 4 346 -- -- --90:10 37 266 4 270 -- -- --80:20 38 89 8 97 -- -- --50:50 4 40 24 64 -- -- --20:80 39 25 37 62 -- -- --10:90 40 58 89 147 -- -- --0:100 41 89 177 266 -- -- -- Com. 102 5 107 88 12 100 Sample A__________________________________________________________________________
TABLE 4e__________________________________________________________________________ Wear in Leaded Gasoline Test (.mu.m) Sam- 1st Phase 2nd Phase Valve Seat ple No. (wt %) (wt %) Insert Valve Total__________________________________________________________________________W cont. in 1stPhase (wt %)0 73 50 50 120 10 1302 74 50 50 93 18 1113 75 50 50 28 25 535 22 50 50 14 28 427 76 50 50 33 46 798 77 50 50 58 78 13610 78 50 50 68 98 166W cont. in 2ndPhase (wt %)0 79 50 50 119 12 1312 80 50 50 98 13 1113 81 50 50 59 11 707 82 50 50 36 12 4812 22 50 50 14 28 4215 83 50 50 56 33 8916 84 50 50 89 56 14518 85 50 50 98 60 158__________________________________________________________________________
TABLE 4f__________________________________________________________________________ Wear in Leaded Gasoline Test (.mu.m) Sam- 1st Phase 2nd Phase Valve Seat ple No. (wt %) (wt %) Insert Valve Total__________________________________________________________________________V cont. in 2ndPhase (wt %)0 86 50 50 380 5 3851 87 50 50 245 7 2522 88 50 50 68 10 785 22 50 50 14 28 427 89 50 50 23 48 718 90 50 50 54 76 13010 91 50 50 89 98 187Cr cont. in 2ndPhase (wt %)0 92 50 50 130 45 1751 93 50 50 88 44 1322 94 50 50 60 39 994 22 50 50 14 28 427 95 50 50 15 25 408 96 50 50 78 40 11810 97 50 50 98 65 163__________________________________________________________________________
TABLE 4g__________________________________________________________________________ Wear in Leaded Gasoline Test (.mu.m) Sam- 1st Phase 2nd Phase Valve Seat ple No. (wt %) (wt %) Insert Valve Total__________________________________________________________________________Cr cont. in 1stPhase (wt %)0.2 22 50 50 14 28 421 98 50 50 38 36 741.5 99 50 50 67 30 974 100 50 50 230 145 3754 101 50 50 276 89 365Ratio of1st Phaseto 2ndPhase by wt.100:0 102 100 0 246 1 24790:10 103 90 10 233 2 23580:20 104 80 20 78 5 8350:50 22 50 50 14 28 4220:80 105 20 80 26 40 6610:90 106 10 90 68 76 1440:100 107 0 100 78 167 245__________________________________________________________________________
TABLE 5a__________________________________________________________________________ Radial Wear in Leaded Gasoline Test (.mu.m) Crushing Sam- 1st Phase 2nd Phase Valve Seat Strength ple No. (wt %) (wt %) Insert Valve Total (MPa)__________________________________________________________________________Si cont. in 1st or2nd Phase (wt %)0.05 42 50 50 450 50 500 2890.1 43 50 50 59 40 99 8320.3 4 50 50 58 38 96 9350.6 44 50 50 48 36 84 8370.7 45 50 50 29 20 49 7252 46 50 50 35 18 53 6105 47 50 50 37 15 52 5887 48 50 50 268 58 326 345Mn cont. in 1st or2nd Phase (wt %)0.05 49 50 50 6000.1 50 50 50 7880.2 51 50 50 8960.3 4 50 50 9350.6 52 50 50 7990.7 53 50 50 4881 54 50 50 321__________________________________________________________________________
TABLE 5b__________________________________________________________________________ Radial Max. Sam- Wear in Leaded Gasoline Test (.mu.m) Crushing Compact Cutting ple 1st Phase 2nd Phase Valve Seat Strength Density Force No. (wt %) (wt %) Insert Valve Total (MPa) (g/cm.sup.3) (kgf)__________________________________________________________________________Precipitated MnScont. in 1st or 2ndPhase (wt %)0.08 55 50 50 911 6.88 780.17 56 50 50 898 6.87 680.33 57 50 50 862 6.85 540.5 58 50 50 832 6.84 511 59 50 50 788 6.8 481.17 60 50 50 725 6.78 441.67 61 50 50 675 6.76 412.5 62 50 50 331 6.51 38(Precipitated MnS +Si) cont. in 1st or2nd Phase (wt %)0.3 4 50 50 58 38 96 812.5 63 50 50 35 18 53 53__________________________________________________________________________
TABLE 5c__________________________________________________________________________ Radial Wear in Leaded Gasoline Test (.mu.m) Crushing Compact Max. Sam- 1st Phase 2nd Phase Valve Seat Strength Density Cutting ple No. (wt %) (wt %) Insert Valve Total (MPa) (g/cm.sup.3) Force (kgf)__________________________________________________________________________Added MnSPowder (parts byweight)0 4 50 50 935 6.90 810.1 64 50 50 920 6.87 800.2 65 50 50 901 6.87 720.3 66 50 50 868 6.86 570.5 67 50 50 833 6.84 541.0 68 50 50 790 6.81 531.2 69 50 50 720 6.79 491.6 70 50 50 671 6.75 432.5 71 50 50 350 6.52 40Added MnSPowder & Siin 1st and 2ndPhases (parts bywt.)0.3 4 50 50 58 38 96 812.5 72 50 50 38 15 53 55__________________________________________________________________________
TABLE 5d__________________________________________________________________________ Radial Wear in Leaded Gasoline Test (.mu.m) Crushing Sam- 1st Phase 2nd Phase Valve Seat Strength ple No. (wt %) (wt %) Insert Valve Total (MPa)__________________________________________________________________________Si cont. in 1st or2nd Phase (wt %)0.05 108 50 50 450 50 500 2790.1 109 50 50 59 31 90 8210.3 22 50 50 19 28 47 9040.6 110 50 50 18 20 38 8170.7 111 50 50 15 20 35 7202 112 50 50 10 16 26 6055 113 50 50 37 15 52 5707 114 50 50 268 58 326 330Mn cont. in 1st or2nd Phase (wt %)0.05 115 50 50 4040.1 116 50 50 7780.2 117 50 50 8780.3 22 50 50 9040.6 118 50 50 7120.7 119 50 50 4681 120 50 50 302__________________________________________________________________________
TABLE 5e__________________________________________________________________________ Radial Wear in Leaded Gasoline Test (.mu.m) Crushing Compact Max. Sam- 1st Phase 2nd Phase Valve Seat Strength Density Cutting ple No. (wt %) (wt %) Insert Valve Total (MPa) (g/cm.sup.3) Force (kgf)__________________________________________________________________________Precipitated MnScont. in 1st or 2ndPhase (wt %)0.08 121 50 50 902 6.77 850.17 122 50 50 882 6.75 720.33 123 50 50 850 6.74 600.5 124 50 50 802 6.73 581 125 50 50 761 6.69 571.17 126 50 50 708 6.66 561.67 127 50 50 666 6.64 512.5 128 50 50 311 6.42 48(Precipitated MnS +Si) cont. in 1st or2nd Phase (wt %)0.3 22 50 50 14 28 42 872.5 129 50 50 8 18 26 60__________________________________________________________________________
TABLE 5f__________________________________________________________________________ Radial Wear in Leaded Gasoline Test (.mu.m) Crushing Compact Max. Sam- 1st Phase 2nd Phase Valve Seat Strength Density Cutting ple No. (wt %) (wt %) Insert Valve Total (MPa) (g/cm.sup.3) Force (kgf)__________________________________________________________________________Added MnSPowder (parts byweight)0 22 50 50 904 6.80 870.1 130 50 50 903 6.78 860.2 131 50 50 880 6.76 730.3 132 50 50 852 6.75 580.5 133 50 50 799 6.73 571.0 134 50 50 759 6.70 571.2 135 50 50 712 6.65 551.6 136 50 50 660 6.63 522.5 137 50 50 315 6.41 50Added MnSPowder & Siin 1st and 2ndPhases (parts bywt.)0.3 22 50 50 14 28 42 872.5 138 50 50 7 13 20 62__________________________________________________________________________
TABLE 6__________________________________________________________________________Wear in Unleaded Gasoline Test (.mu.m) Wear in Leaded Gasoline Test (.mu.m)Sample Valve Seat Valve Seat Max. CuttingNo. Insert Valve Total Insert Valve Total Force (kgf)__________________________________________________________________________4 40 24 64 58 38 96 814-Cu 30 20 50 28 17 45 --4-Pb 25 10 35 60 10 70 384-Resin -- -- -- -- -- -- 3222 55 31 86 14 28 42 8322-Cu 35 28 63 8 16 24 --22-Pb 28 11 39 14 5 19 4122-Resin -- -- -- -- -- -- 3858 38 21 59 56 33 89 5158-Cu 31 19 50 27 17 44 --58-Pb 27 8 35 70 11 81 2558-Resin -- -- -- -- -- -- 22124 52 28 80 16 21 37 58124-Cu 34 21 55 10 13 23 --124-Pb 30 17 47 16 7 23 26124-Resin -- -- -- -- -- -- 2346 35 18 53 8246-Cu 25 14 39 --46-Pb 37 10 47 3846-Resin -- -- -- 33112 10 16 26 85112-Cu 5 4 9 --112-Pb 11 2 13 40112-Resin -- -- -- 3763 35 18 53 5363-Cu 24 14 38 --63-Pb 36 8 44 2763-Resin -- -- -- 24129 8 18 26 60129-Cu 4 5 9 --129-Pb 10 2 12 28129-Resin -- -- -- 25__________________________________________________________________________
The entire disclosure of each of Japanese Patent Application No. 8-92752 filed on Apr. 15, 1996 and Japanese Patent Application No. 9-57943 filed on Mar. 12, 1997, including specification, claims, drawings and summary, is incorporated herein by reference in its entirety.

Number	Date	Country	Kind
8-092752	Apr 1996	JPX
9-057943	Mar 1997	JPX

Number	Name	Date
4121927	Lohman et al.	Oct 1978
4504312	Oaku et al.	Mar 1985
4505988	Urano et al.	Mar 1985
4552590	Nakata et al.	Nov 1985
5031878	Ishikawa et al.	Jul 1991
5462573	Baker et al.	Oct 1995
5756909	Liimatainen et al.	May 1998

Number	Date	Country
0 339 436 A1	Nov 1989	EPX
26 45 574 A1	Jul 1977	DEX
63-223147	Sep 1988	JPX
1-51539	Nov 1989	JPX
5-9667	Jan 1993	JPX
5-55593	Aug 1993	JPX
7-233454	Sep 1995	JPX
2116207	Mar 1982	GBX

High-temperature wear-resistant sintered alloy

Information

Patent Number

Date Filed

Date Issued

Inventors

Original Assignees

Examiners

Agents

CPC

US Classifications

Field of Search

US

International Classifications

Abstract

Description

Claims

Priority Claims (2)

US Referenced Citations (7)

Foreign Referenced Citations (8)

Non-Patent Literature Citations (1)