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US 5,154,881 AGranted
Method of making a sintered metal component
AssigneeHoeganaes Corporation
InventorsHoward G. Rutz, Sidney Luk
Life of this patent
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Abstract
Methods of making sintered parts from a metal powder composition that contains an amide lubricant are provided. The composition comprises an iron-based powder and a lubricant that is the reaction product of a monocarboxylic acid, a dicarboxylic acid, and a diamine. The composition is compacted in a die, preferably at an elevated temperature of up to about 370.degree. C., at conventional compaction pressures, and then sintered according to standard powder-metallurgical techniques.
Claims14
A method of making a sintered metal part comprising the steps of:
- (a) providing a metal powder composition comprising:
- (i) an iron-based metal powder and (ii) an amide lubricant, in an amount up to about 15% by weight of said composition, that is the reaction product of about 10-30 weight percent of a C.sub.6 -C.sub.12 linear dicarboxylic acid, about 10-30 weight percent of a C.sub.10 -C.sub.22 monocarboxylic acid, and about 40-80 weight percent of a diamine having the formula (CH.sub.2).sub.x (NH.sub.2).sub.2 where x is 2-6;
- (b) compacting the metal powder composition in a die at a temperature up to about 370.degree. C.;
- and
- (c) sintering the compacted composition.
2 more elements
The method of claim wherein the monocarboxylic acid is stearic acid.
Dependencies are inferred from the claim text.