论文部分内容阅读
利用超音速火焰喷涂工艺在铜基复合材料表面制备WC-12Co涂层.分析了涂层的微观结构、相组成和含量以及表面和截面硬度,并对涂层的摩擦磨损性能进行测试.结果表明:涂层组织和截面硬度分布均匀,耐磨性好,摩擦过程中会形成两种摩擦膜.磨损率随载荷增加而呈增大趋势,随转速的增加呈先减小后增大的趋势.涂层最适用的环境为300~500 r·min-1和2~3 N,磨损率与滑动速度间的回归方程满足一元二次函数;磨损率与载荷间的回归方程满足指数方程.
The WC-12Co coating was prepared on the surface of copper matrix composites by supersonic flame spraying process.The microstructure, phase composition and content of the coating and the surface and cross-section hardness were analyzed and the friction and wear properties of the coating were tested.The results show that : The coating has uniform hardness and cross section, good abrasion resistance, and two types of friction films are formed during the friction.The wear rate tends to increase with the increase of load, and then decreases with the increase of the speed, then increases first and then increases. The most suitable environment for the coating is 300 ~ 500 r · min-1 and 2 ~ 3 N, the regression equation between the wear rate and the sliding speed satisfies the quadratic function; the regression equation between the wear rate and the load satisfies the exponential equation.