Claims
- 1. A wear-resistant intermetallic compound alloy having superior machineability which consists essentially of: (i) 45-60% of Co or (ii) a Co and Ni content of 45-60% with the Co content being at least 5%; at least one of 0.1-2% of Hf and 0.05-2% of Re; 0.1-2% of at least one element selected from the group consisting of Si, P, Cu, Zn, Ga, Ge, Cd, In, Sn, Sb, Pb, and Bi; 0-2% of C; and 0-5% of at least one element selected from the group consisting of Zr, Fe, V, Nb, Ta, Cr, Mo, W and Mn; the balance being Ti and incidental impurities, the percent being atomic percent.
- 2. A wear-resistant intermetallic compound alloy having superior machineability which consists essentially of: (i) 45-60% of Co or (ii) a Co and Ni content of 45-60% with the Co content being at least 5%; at least one of 0.1-2% of Hf and 0.05-2% of Re; 0-2% of at least one element selected from the group consisting of Si, P, Cu, Zn, Ga, Ge, Cd, In, Sn, Sb, Pb, and Bi; 0.05-2% of C; and 0-5% of at least one element selected from the group consisting of Zr, Fe, V, Nb, Ta, Cr, Mo, W and Mn; the balance being Ti and incidental impurities, the percent being atomic percent.
- 3. A wear-resistant intermetallic compound alloy having superior machineability which consists essentially of: (i) 47-53% of Co or (ii) a Co and Ni content of 47-53% with the Co content being at least 5%; at least one or 0.1-2% of Hf and 0.05-2% of Re; 0.1-2% of at least one element selected from the group consisting of Si, P, Cu, Zn, Ga, Ge, Cd, In, Sn, Sb, Pb, and Bi; 0-2% of C; and 0-5% of at least one element selected from the group consisting of Zr, Fe, V, Nb, Ta, Cr, Mo, W and Mn; the balance being Ti and incidental impurities, the percent being atomic percent.
- 4. The alloy according to claim 3, which contains 0.05-2% of C.
- 5. The alloy according to claim 4 which contains 0.1-5% of at least one element selected from the group consisting of Zr, Fe, V, Nb, Ta, Cr, Mo, W and Mn.
- 6. The alloy according to claim 4 which contains 0.1-3% of at least one element selected from the group consisting of Zr, Fe, V, Nb, Ta, Cr, Mo, W and Mn.
- 7. The alloy according to claim 6 which contains a total of 47-53% nickel and cobalt with the cobalt content being at least 20%.
- 8. The alloy according to claim 6 which contains 47-53% cobalt and does not contain nickel.
- 9. A wear-resistant intermetallic compound alloy having superior machineability which consists essentially of: (i) 47-53% of Co or (ii) a Co and Ni content of 47-53% with the Co content being at least 5%, at least one of 0.1-2% of Hf and 0.05-2% of Re; 0.2% of at least one element selected from the group consisting of Si, P, Cu, Zn, Ga, Ge, Cd, In, Sn, Sb, Pb, and Bi; 0.05-2% of C; and 0.1-3% of at least one element selected from the group consisting of Zr, Fe, V, Nb, Ta, Cr, Mo, W and Mn; the balance being Ti and incidental impurities, the percent being atomic percent.
- 10. The alloy according to claim 9 which contains 0.1-2% of at least one element selected from the group consisting of Si, P, Cu, Zn, Ga, Ge, Cd, In, Sn, Sb, Pb and Bi.
- 11. A wear-resistant intermetallic compound alloy having superior machineability which consists essentially of: a Co and Ni content of 47-60% with the Co content being at least 20%; at least one if 0.1-2% of Hf and 0.05-2% of Re; 0-2% of at least one element selected from the group consisting of Si, P, Cu, Zn, Ga, Ge, Cd, In, Sn, Sb, Pb, and Bi; 0-2% of C; and 0-5% of at least one element selected from the group consisting of Zr, Fe, V, Nb, Ta, Cr, Mo, W and Mn; the balance being Ti and incidental impurities, the percent being atomic percent.
- 12. The alloy according to claim 11 which contains a total of 47-53% nickel and cobalt with the cobalt content being at least 20%.
- 13. A wear-resistant intermetallic compound alloy having superior machineability which consists essentially of: 45-60% of Co and does not contain Ni; at least one of 0.1-2% of Hf and 0.05-2% of Re; 0-2% of at least one element selected from the group consisting of Si, P, Cu, Zn, Ga, Ge, Cd, In, Sn, Sb, Pb, and Bi; 0-2% of C; and 0-5% of at least one element selected from the group consisting of Zr, Fe, V, Nb, Ta, Cr, Mo, W and Mn; the balance being Ti and incidental impurities, the percent being atomic percent.
- 14. The alloy according to claim 13, which contains a total of 47-53% cobalt and does not contain nickel.
Priority Claims (4)
| Number |
Date |
Country |
Kind |
| 60-289600 |
Dec 1985 |
JPX |
|
| 61-28508 |
Feb 1986 |
JPX |
|
| 61-28509 |
Feb 1986 |
JPX |
|
| 61-28510 |
Feb 1986 |
JPX |
|
FIELD OF ART
This application is a continuation-in-part of application Ser. No. 938,005, filed Dec. 4, 1986, now abandoned.
The present invention relates to an intermetallic compound alloy that has superior machineability and wear resistance and which is suitable for use in the manufacture of molds for the shaping of depolarizing mixes for dry cells, dies for drawing optical fibers, etc., and other wear-resistant parts such as valves and pump components.
Conventionally, parts that are used in applications where high wear resistance is required are made of intermetallic compound alloys that contain 45-60 atomic percent (all percentages mentioned hereinafter are on an atom basis) of Ni or Co or both, with the balance being composed of Ti and incidental impurities. Such intermetallic compound alloys exhibit high wear resistance for a prolonged period of time but, on the other hand, their machineability is poor and it is difficult to drill them. So much skill and time is necessary to machine these alloys into complicated shapes that the production cost of the finished product becomes substantial.
In addition, because of their high Ti content, the intermetallic compounds described above will easily absorb oxygen; the increase in the oxygen in the alloy causes its rapid embrittlement and the chance of the occurrence of cracking in the alloy during machining is increased. To avoid this problem, the alloy must be melted and cast either in vacuum or in an atmosphere in which the air has been fully displaced with an inert gas. Furthermore, the starting material to be melted desirably has a minimum oxygen content. In fact, however, some of the commercial titanium feeds contain at least 500-1,500 ppm of oxygen and, if such O.sub.2 -rich titanium feeds are used, the oxygen content of the resulting alloy will become as high a 1,200-2,000 ppm of oxygen even if the melting and casting operations are performed in vacuum or in an inert atmosphere. An alloy having such high oxygen content has no use other than as scrap because its toughness is too low to withstand machining.
An object, therefore, of the present invention is to provide an intermetallic compound alloy that has improved thoughness and which yet exhibits better machineability than the conventional product. This object can be achieved by an intermetallic compound alloy that contains 45-60% of Ni, Co or both with a cobalt content of at least 5%, at least one of 0.1-2% of Hf and 0.05-2% of Re, 0-2% of at least one element selected from the group consisting of Si, P, Cu, Zn, Ga, Ge, Cd, In, Sn, Sb, Pb and Bi, 0-2% of C, and 0-5% of at least one element selected from the group consisting of Zr, Fe, V, Nb, Ta, Cr, Mo, W and Mn, with the balance being Ti and incidental impurities.
US Referenced Citations (4)
| Number |
Name |
Date |
Kind |
|
3276865 |
Freche et al. |
Oct 1966 |
|
|
3660082 |
Negishi et al. |
May 1972 |
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4011075 |
Watanabe et al. |
Mar 1977 |
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4019899 |
Negishi et al. |
Apr 1977 |
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Foreign Referenced Citations (2)
| Number |
Date |
Country |
| 157934 |
Sep 1983 |
JPX |
| 28548 |
Feb 1984 |
JPX |
Continuation in Parts (1)
|
Number |
Date |
Country |
| Parent |
938005 |
Dec 1986 |
|
Patent Grant
4874577
