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US 4,484,644 AGranted
Sintered and forged article, and method of forming same
AssigneeIngersoll-Rand Company
InventorsJohn P. Cook, Bani R. Banerjee
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Abstract
An embodiment of the article comprises a metallic body formed, by a powder metallurgy technique, of steel powder and tungsten carbide particles, and forged, having a total density of not less than one hundred percent. The method, then, comprises (a) the powder metallurgy steps of forming and sintering the body, and (b) the subsequent forging step, to produce the one hundred percent total density steel and tungsten carbide article.
Claims10
A sintered and hot-forged article, having areas of differing hardness, comprising:
- a metallic, sintered and forged body;
- said body comprising a matrix homogeneously formed from a pair of ingredients comprising steel powder and tungsten carbide particles;
- and
- said body having a first matrix cross-section constituted by a first ratio of one of said ingredients to the other thereof, and a second matrix cross-section constituted by a second ratio of said one ingredient to said other ingredient;
- and wherein
- said first ratio is approximately eighty-five percent tungsten carbide to fifteen percent steel powder, and said second ratio is approximately fifty-five percent tungsten carbide to forty-five percent steel powder.
3 more elements
Dependencies are inferred from the claim text.