研究了三层铜铅合金轴瓦的铅基涂层中所含锡和铟的扩散性能。锡与铟相比较更容易扩散,因而降低了涂层的耐腐蚀能力。锡与下层物质反应,形成易损的镍-锡或铜-锡金属化合物, 导致了结合强度变差。在铅-铟涂层中加入铜,明显抑制了铟的扩散,因而在长时期内稳定了耐腐蚀性、结合强度及机械性能。对铅-铟-铜涂层进行了穴蚀试验、咬合试验和轴瓦疲劳试验,以研究对现有发动机轴瓦的适用性。 The diffusion properties of tin and indium in lead-based coatings of three-layer copper-lead alloy bush were studied. Tin diffuses more readily than indium, thereby reducing the coating’s corrosion resistance. Tin reacts with the underlying material to form a brittle nickel-tin or copper-tin metal compound, resulting in poor bond strength. Addition of copper to the lead-indium coating significantly suppresses the diffusion of indium, thereby stabilizing corrosion resistance, bonding strength and mechanical properties over a long period of time. Cave tests, bite tests, and bearing fatigue tests on lead-indium-copper coatings were conducted to investigate the applicability to existing engine bearings.