Claims
- 1. A process for the preparation of a free flowing agglomerated iron-based powder comprising mixing dry ingredients of:
- a) 63-95% by weight of an iron base powder consisting essentially of iron and having a particle size essentially less than 75 .mu.m;
- b) 5-20% by weight of a lubricating phase having a particle size essentially less than 120 .mu.m;
- c) 0-15% by weight of a hard phase material having a particle size essentially less than 10 .mu.m; and
- d) 0-7% of additives in a mixing chamber;
- filling the mixing chamber with an inert gas;
- mixing the ingredients with at most 1 % by weight, based on the total mixture, of a binding agent and adding a solvent; and
- drying the obtained powder.
- 2. The process according to claim 1, wherein the lubricating phase essentially consists of MnS and/or the lubricating phase has a particle size essentially less than 60 .mu.m.
- 3. The process according to claim 1, wherein the hard phase is selected from the group consisting of carbides optionally including NbC, TiC, VC and TaC.
- 4. The process according to claim 1, wherein the additive is selected from the group consisting of Fe.sub.3 P, graphite and/or various conventional lubricants optionally including waxes, stearates and polymers.
- 5. The process according to claim 2, wherein the hard phase is selected from the group consisting of carbides optionally including NbC, TiC, VC and TaC.
- 6. The process according to claim 2, wherein the additive is selected from the group consisting of Fe.sub.3 P, graphite and/or various conventional lubricants optionally including waxes, stearates and polymers.
- 7. The process according to claim 3, wherein the additive is selected from the group consisting of Fe.sub.3 P, graphite and/or various conventional lubricants optionally including waxes, stearates and polymers.
- 8. The process according to claim 5, wherein the additive is selected form the group consisting of Fe.sub.3 P, graphite and/or various conventional lubricants optionally including waxes, stearates and polymers.
Priority Claims (1)
Number |
Date |
Country |
Kind |
9604538 |
Dec 1996 |
SEX |
|
Parent Case Info
This is a continuation of International Application No. PCT/SE97/02062 filed Dec. 10, 1997, that designates the United States of America and which claims priority from Swedish Application No 9604538-0, filed Dec. 10, 1996.
US Referenced Citations (4)
Foreign Referenced Citations (4)
Number |
Date |
Country |
0118716A1 |
Sep 1984 |
EPX |
0310115A1 |
Apr 1987 |
EPX |
0719608A2 |
Jul 1996 |
EPX |
WO9423868 |
Oct 1994 |
WOX |
Continuations (1)
|
Number |
Date |
Country |
Parent |
PCTSE9702062 |
Dec 1997 |
|