Valve seat inserts of sintered ferrous materials

Details Valve seat inserts of sintered ferrous materials Valve seat inserts of sintered ferrous materials

1994-01-21

1995-10-31

Walsh, Donald P.

Specialized metallurgical processes, compositions for use therei

Compositions

Consolidated metal powder compositions

75236, 75239, 75240, 75241, 75246, C22C 3824

Patent

active

054625734

ABSTRACT:
Sintered ferrous materials are described having a composition in wt % lying within the ranges of C 0.8-1.5/W 1-4.4/Mo 1-4.4/V 1-2.6/Cr 1.3-3.2/Others 3 max./Fe balance. The material may be made by a method comprising the steps of mixing between 40 and 70 wt % of a powder having a composition in wt % within the ranges C 0.45-1.05/W 2.7-6. 2/Mo 2.8-6.2/V 2.8-3.2/Cr 3.8-4.5/Others 3.0 max./Fe balance with between 60 and 30 wt % of an iron powder and from 0.4 to 0.9 wt % of carbon powder, pressing a green body of the article from the mixed powder and then sintering the green body. The material may optionally contain sulphur, metallic sulphides. The material may be infiltrated.

REFERENCES:
patent: 3653982 (1972-04-01), Prill
patent: 3982907 (1976-09-01), Honma
patent: 4485770 (1984-12-01), Saka et al.
patent: 4648903 (1987-03-01), Ikenoue et al.
patent: 4755222 (1988-07-01), Heinze et al.

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