| 摘要 |
PURPOSE:To obtain the tilted alloy having superior wear resistance and attacking hardly an opposite material by uniformly dispersing Co alloy grains and grains of a carbide such a Cr7C3 as hard grains in a pearlite-base iron matrix under specified conditions. CONSTITUTION:A sintered iron alloy for a valve seat having improved wear resistance and weakened attacking properties on an opposite valve is obtd. by uniformly dispersing, by weight, 5-25% alloy grains consisting of 10-40% Cr, 5-20% W, 0.5-3% C and the balance Co and 1-10% hard grains of one or more kinds of carbides selected among Cr7C3, Cr3C2 and Mo2C in a pearlite- base iron matrix contg. 0.5-2.0% C.
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