Powdered metal valve seat insert

Details Powdered metal valve seat insert Powdered metal valve seat insert

1986-10-29

1988-02-09

Lechert, Jr., Stephen J.

Specialized metallurgical processes, compositions for use therei

Compositions

Consolidated metal powder compositions

75238, 75241, 75243, 75244, 75246, 419 11, 419 14, 419 15, 419 13, C22C 2902

Patent

active

047240008

ABSTRACT:
Wear resistant articles, especially valve seat inserts for internal combustion engines, are produced as sintered metal compacts comprising interspersed microzones of prealloyed austenitic stainless steel and softer ferrous metal, the microzones of austenitic stainless steel containing carbides and carbonitrides. The sintered compacts can be made by forming a green compact from prealloyed austenitic stainless steel powder atomizate blended with softer powdered ferrous metal component and powdered carbon, and sintering the green compact.

REFERENCES:
patent: 4035159 (1977-07-01), Hashimoto et al.
patent: 4204031 (1980-05-01), Takemura et al.
patent: 4233073 (1980-11-01), Takemura
patent: 4377892 (1983-03-01), Gonzalez
patent: 4485147 (1984-11-01), Nishino et al.
patent: 4531273 (1985-07-01), Smith et al.
patent: 4546737 (1985-10-01), Kazuoka et al.
patent: 4581202 (1986-04-01), Kudo et al.

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