Is superior in abrasion resistance the lead impregnation Fe basic sintering alloy make valve seat

摘要

PURPOSE: To improve the wear resistance of a valve seat made of a lead impregnated Fe-based sintered alloy and used as a structural member in an internal- combustion engine, etc. ;CONSTITUTION: A valve seat is made of a lead impregnated Fe-based sintered alloy obtd. by impregnating lead into an Fe-based sintered alloy having a compsn. consisting of, by weight, 0.7-1.5% C, 0.1-0.5% Si, 0.1-0.5% Mn, 2-6% Cr, 2-10% Mo, 1-6% V, 1-10% W, 0.2-10% Co and the balance Fe with inevitable impurities and having 5-25% porosity.;COPYRIGHT: (C)1993,JPO&Japio