Specialized metallurgical processes – compositions for use therei – Compositions – Consolidated metal powder compositions
Patent
1991-10-16
1993-10-26
Walsh, Donald P.
Specialized metallurgical processes, compositions for use therei
Compositions
Consolidated metal powder compositions
75243, B22F 900
Patent
active
052561844
ABSTRACT:
A powder composition is suitable for making a valve seat insert having good machinability and high temperature wear resistance. The composition consists essentially of about 0.5%-5% nickel, about 1%-10% molybdenum, less than 0.1% copper, about 0.4%-1.2% carbon, the remainder being iron. The ratio of nickel to molybdenum is about 0.25:1 to 1:1. The nickel and molybdenum are preferably present as a blend of elemental nickel, elemental molybdenum, and a pre-alloyed powder in which nickel and molybdenum are pre-alloyed with iron.
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Kosco John C.
Neumann William
Mai Ngoclan
TRW Inc.
Walsh Donald P.
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