| 摘要 |
PROBLEM TO BE SOLVED: To provide an aluminum bronze sintered bearing for an EGR (Exhaust Gas Recirculation) valve, which has improved wear resistance, corrosion resistance and slidability under high temperature dry atmosphere, and which is made compact and low cost, and to provide a method of manufacturing the aluminum bronze sintered bearing for an EGR valve, having good productivity and low cost and suitable for large scale production.SOLUTION: The sintered bearing 1 for an EGR valve is provided which contains 9 to 12 wt.% of aluminum, 0.1 to 0.6 wt.% of phosphorus and 3 to 10 wt.% of graphite and the balance copper with inevitable impurities, the sintered bearing 1 having structure in which an aluminum-copper alloy is sintered and free graphite are distributed in pores formed in a dispersed manner. |
