真空熔结镍基合金涂层的组织结构及其高温磨损特性  

Study on Microstructure and High Temperature Wear Characteristics of a Vacuum Melting Ni base Alloy Coating

作　　者：李志[1] 曲敬信[2] 吴仲行 周平安[4] 邵荷生[2] 

机构地区：[1]北京航空材料研究院,北京100095 [2]中国矿业大学北京校区,北京100083 [3]北京市紫金耐磨技术研究所,北京100089 [4]中国农业机械化科学研究院,北京100083

出　　处：《材料工程》2000年第1期7-12,共6页Journal of Materials Engineering

基　　金：航空基金

摘　　要：研究了一种真空熔结镍基合金涂层的组织结构及其干摩擦滑动磨损特性。结果表明,镍基合金涂层中的析出相主要有硼化物、碳化物和硅化物,其中硼化物、碳化物起强化作用,硅化物改善涂层熔结过程中的工艺性能。涂层磨损的主要方式是微犁削,因镍基合金涂层具有较高的高温硬度,高温下具有良好的抗磨性能。磨损过程中在磨损表面覆盖的氧化物层对涂层起到保护和减磨作用。Microstructure and high temperature wear characteristics of a vacuum melting Ni base alloy coating have been studied The results indicate that the main separating phases include borides, carbides and silicides, of which the borides and carbides are dispersion strengthening phases while the silicides mainly improve technological properties of the vacuum melting process The main mode of wear is micro plowing and because of comparatively high hardness at high temperature, the Ni base alloy coating has better wear resistant properties than 3Cr2W8V steel which becomes drastically softening as the temperature is beyond 500℃ During wear process oxide layer formed and covered the wear surface, which protected the wear surface and decrease the wear

关 键 词：真空熔结 镍基合金涂层 组织结构 高温磨损特性 

分 类 号：TG174.445[金属学及工艺—金属表面处理] TG178[金属学及工艺—金属学]