Value guide member formed of Fe-based sintered alloy having exce

Details Value guide member formed of Fe-based sintered alloy having exce Value guide member formed of Fe-based sintered alloy having exce

1994-04-20

1996-04-16

Yuen, Henry C.

Internal-combustion engines

Valve

Reciprocating valve

1231889, F01L 302, F01L 308

Patent

active

055072577

ABSTRACT:
A valve guide member for internal combustion engines is formed of an Fe-based sintered alloy having excellent wear and abrasion resistance, consisting essentially, by weight %, of 1 to 4% C, 1.5 to 6% Cu, 0.1 to 0.8% P, and if required 0.05 to 1% Mo, and the balance of Fe and inevitable impurities, the Fe-based sintered alloy having a structure having a matrix formed mainly of pearlite, in which are dispersed hard Fe--C--P compounds and free graphite, or alternatively hard Fe--C--P compounds, carbides, and free graphite when the alloy contains Mo, the free graphite including 0.5 to 10 area % coarse free graphite having a particle diameter of 70 to 500 .mu.m.

REFERENCES:
patent: 4344795 (1982-08-01), Endo et al.
patent: 4632074 (1985-09-01), Takahashi et al.
patent: 5076866 (1991-12-01), Koike et al.

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