铜基粉末冶金载流摩擦磨损微观形貌分析  

Analysis on Electrical Sliding Wear Morphology of Cu-base Powder Metallurgy

作　　者：刘敬超[1] 王旭[1] 赵培峰[1] 国秀花[1] 张永振[1] 宋克兴[1] 孙乐民[1] 

机构地区：[1]河南科技大学材料科学与工程学院,河南洛阳471003

出　　处：《润滑与密封》2009年第7期14-17,共4页Lubrication Engineering

基　　金：国家973项目(2007CB607603);国家自然科学基金项目(50775066);河南省高校科技创新人才项目(2009HASTIT008);河南省创新团队项目;河南省高校杰出科研人才创新工程项目(2007KYCX008)

摘　　要：对铜基粉末冶金材料进行载流摩擦磨损实验,对磨损后的微观组织进行了观察与分析。结果表明,铜基粉末冶金材料在载流条件下,销试样表面不断发生氧化,电流为40和60A时,摩擦表面覆盖着一层Fe的氧化物;电流为80和100A时试样由于表面温度更高,形成Cu的氧化物。产生氧化物的不同,电弧产生烧损的严重程度不同,是导致不同电流下磨损机制不同、磨损率相差大的原因。电流较大时电烧蚀严重,加快了磨损进程。The electrical wear tests of Cu-base powder metallurgy was made, and the worn surface morphology was investigated. Results show that during the wearing process, the pin surface is oxidized continually. Friction surfaces are covered with oxide of iron at current of 40 A and 60 A, and with oxide of copper at 80 A and 100 A because of higher temperature. The dissimilar oxide and the degree of electric arc bum cause the difference of wear mechanism and discrepant wear rate. The larger current leads to electric ablation seriously and accelerates wear rate.

关 键 词：铜基粉末冶金 摩擦磨损 载流 电烧蚀 

分 类 号：TH117.1[机械工程—机械设计及理论]