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US 5,108,493 AGranted
Steel powder admixture having distinct prealloyed powder of iron alloys
AssigneeHoeganaes Corporation
InventorRobert J. Causton
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Abstract
A steel powder composition useful in the production, by powder-metallurgical methods, of sintered parts with high density, good dimensional accuracy, hardenability, and strength is prepared from an admixture of two pre-alloyed iron powders of different compositions, the first being a pre-alloy of iron and molybdenum, and the second being a pre-alloy of iron with carbon and at least one transition element including chromium, manganese, vanadium, or columbium.
Claims10
A steel powder composition comprising
- (a) a first pre-alloyed iron-based powder containing about 0.5-3.0 percent by weight dissolved molybdenum;
- said first iron-based powder in intimate admixture with
- (b) a second pre-alloyed iron-based powder containing at least 0.15 percent by weight carbon and at least about 25% by weight of a transition element component, wherein said transition element component comprises at least one element selected from the group consisting of chromium, manganese, vanadium, and columbium;
- wherein said second powder is in said admixture in a proportion to provide at least about 0.05 weight percent of said transition element component to the steel powder composition.
1 more element
Dependencies are inferred from the claim text.