铜-锡配比对Cu基耐磨合金耐磨性的影响

Effects of Copper-Tin Ratio on Wear Resistance of Copper-based Friction Materials

采用粉末冶金工艺制备了w(Sn)/w(Cu+Sn)比值分别为0、6%、9%和12%的Cu基耐磨材料,对其组织结构、显微硬度变化幅度和不同载荷下的摩擦磨损性能进行分析。结果表明,Cu基耐磨材料中加入Sn可明显提高其显微硬度和耐磨性;w(Sn)/w(Cu+Sn)为9%时,主要磨损机制为磨粒磨损,并且在高载荷下呈现出了较好的耐磨性。

In order to understand the effects of copper-tin ratio on the friction and wear properties of copper-based friction materials,the copper-based friction materials with w(Sn)/w(Cu+Sn)of 0,6%,9% and 12%(in weight)were prepared by powder metallurgy process.The microstructure and micro-hardness as well as friction and wear properties under different applied loads were analyzed.The results show that the micro-hardness of copper matrix and the wear resistance of the materials are improved obviously by adding metallic tin in copper-based friction materials.When w(Sn)/w(Cu+Sn)is 9%,the main wear mechanism is abrasive wear,demonstrating better wear resistance at high applied load.