Sintered valve seat and production method therefor

Details Sintered valve seat and production method therefor Sintered valve seat and production method therefor

2006-06-13

2009-08-11

King, Roy (Department: 1793)

Specialized metallurgical processes, compositions for use therei

Compositions

Consolidated metal powder compositions

C075S246000, C410S010000, C410S027000, C410S038000

Reexamination Certificate

active

07572312

ABSTRACT:
A sintered valve seat includes: a matrix; 5 to 40 mass % of a hard phase dispersed in the matrix, the hard phase containing 48 to 60 mass % of Mo; 3 to 12 mass % of Cr; 1 to 5 mass % of Si; and the balance of Co and inevitable impurities; and a structure in which a Cr sulfide is dispersed around the hard phase. The hard phase is formed with a Co base alloy matrix and compounds which are mainly composed of Mo silicides and are integrally precipitated in the Co base alloy matrix.

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