一、前言铅青铜是一种良好的耐磨材料,能在高转速、高负荷及高温条件下工作,尤其是当润滑系统发生故障时,铅被溶化能起润滑作用,不致引起机器停转故障,因此在航空发动机及其他动力装置中,被广泛用来制造主轴轴承、联杆衬套、螺旋桨衬套等重要零件。但是由于铜 I. Introduction Lead bronze is a good wear-resistant material, can work under high speed, high load and high temperature conditions, especially when the lubrication system fails, the lead is dissolved can play a role in lubrication, will not cause the machine to stall fault , So in aeroengines and other power plant, is widely used to manufacture the main shaft bearing, connecting rod bushings, propeller bushings and other important parts. But because of copper