Specialized metallurgical processes – compositions for use therei – Compositions – Consolidated metal powder compositions
Patent
1985-12-19
1987-07-21
Lechert, Jr., Stephen J.
Specialized metallurgical processes, compositions for use therei
Compositions
Consolidated metal powder compositions
419 26, 419 29, 419 38, 419 57, 419 60, 148 127C, B22F 100
Patent
active
046816291
ABSTRACT:
Discrete copper-nickel-tin spinodal alloy articles, such as bearings, containing from about 5 to about 35 wt. % nickel, from about 4 to about 13 wt. % tin and the balance copper are produced by processing a prealloyed alloy powder to form a green body having substantially the desired shape of, and proportionally sized to, the final article and sintering the green body in a reducing atmosphere or a vacuum at a temperature of at least 1650.degree. F. for sufficient time to achieve at least 90% of the theoretical density. The green body may be formed by either compaction or injection molding of the prealloyed powder. The resulting sintered article may be age hardened to effect a spinodal decomposition of the copper-nickel-tin alloy. The age hardened articles exhibit excellent strength properties and homogeneity while retaining significant ductility.
REFERENCES:
patent: 4373970 (1983-02-01), Scorey et al.
patent: 4525325 (1985-06-01), Livak
patent: 4591482 (1986-05-01), Nyce
patent: 4594217 (1986-06-01), Samal
Akers Lawrence C.
Knuth Charles J.
Lechert Jr. Stephen J.
Pfizer Inc.
Richardson Peter C.
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