镀镍石墨粉与铜基自润滑材料摩擦磨损特性研究

采用粉末冶金复压复烧工艺制备铜基石墨复合材料,考察了不同载荷条件下铜基石墨复合材料的摩擦磨损性能.结果表明:在载荷20～60 N条件下,含6%(质量分数)石墨的铜基复合材料经历了轻微磨损、中等磨损到严重磨损3个过程;石墨颗粒表面镀镍可以提高石墨与铜合金基体的界面结合强度以及磨损过程中所形成的转移层与基体间的粘附性能,含6%镀镍石墨的铜基复合材料的自润滑性能得到改善,只经历了轻微磨损和中等磨损2个过程.

Tribological Properties of Cu-matrix/graphite Coated with Nickel Self-lubricating Composites

Cu-matrix/graphite composite materials were prepared by repressing and resintering process of powder metallurgy. Wear and friction property of Cu-matrix/graphite composites were investigated under different loads. The results show that the wear process of Copper matrix composites with 6% wt graphite had three typical stages, i. e. , slight wear stage, medium wear stage and severe wear stage under the load between 20 N and 60 N. When the graphite particles were coated with nickel, the interfacial combination between graphite and Cu-matrix was improved, and the lubricating transfer films formed during the wear process, so they exhibited better anti-adhesion performance with Cu-matrix. The self lubricating properties of Cu-matrix composites containing 6% wt graphite coated with nickel were increased, and the wear process of the composite had only two typical stages, namely slight wear stage and medium wear stage.