BEARING MADE OF SINTERED Cu ALLOY FOR RECIRCULATION EXHAUST GAS FLOW RATE CONTROL VALVE OF EGR TYPE INTERNAL COMBUSTION ENGINE EXHIBITING HIGH STRENGTH AND EXHIBITING EXCELLENT WEAR RESISTANCE IN HIGH TEMPERATURE ENVIRONMENT

摘要

PROBLEM TO BE SOLVED: To provide a bearing made of a sintered Cu alloy for a recirculation exhaust gas flow rate control valve of an EGR (Exhaust Gas Recirculation) type internal combustion engine which has high strengths and also exhibits excellent wear resistance in a high temperature environment.;SOLUTION: The bearing of a recirculating shaft made of austenite stainless steel operating the recirculation exhaust gas flow rate control valve of the EGR type internal combustion engine consists of a sintered Cu alloy containing, by mass, 10 to 30% Ni, 5 to 12% Sn, 3 to 10% C and 0.1 to 0.9% P, and the balance Cu with inevitable impurities, and having a structure in which free graphite is dispersed and distributed into the base of a Cu-Ni-Sn-P based solid solution.;COPYRIGHT: (C)2006,JPO&NCIPI