摘要
采用超音速火焰喷涂技术在35钢基体表面制备了WC-CoCr涂层,利用高精度SLP-20微机控制电液伺服微动试验机研究涂层在复合微动磨损条件下的摩擦学特性,通过扫描电镜观察涂层的微动磨损形貌,探讨其复合微动磨损机理.结果表明:涂层在振幅为40μm时,F-D图由准梯形型转变为闭合的椭圆形型,微动从滑移区过渡到微滑区,振幅增大,处于滑移区的时间也随之延长;WC-CoCr涂层复合微动磨痕呈现典型的中间黏着、边缘磨损的环状磨损形貌,具有非对称性,磨损初期的滑移区以黏着磨损为主,稳定阶段微滑区的磨损机理为疲劳磨损.
High Velocity Oxy-Fuel spraying technique was used to achieve the WC-CoCr coatings on 35# steel surface.The composite fretting wear behavior of the coatings was tested using a SLP-20 electro-hydraulic servo micro testing machine.The wear surface morphology was observed by scanning electron microscopy,and the wear mechanism was investigated.The results show that the F-D curves changed from quasi-trapezoidal loop to elliptical loop under a 40 μm fretting amplitude,while the fretting changed from slip regime to micro-slip regime.With the increase of fretting amplitude,the range of slip regime was slightly enlarged.The fretting scars showed a unsymmetrical ring-shaped morphology with the intermediate adhesion and edge wear,the composite fretting wear mechanisms of WC-CoCr coatings in slip regime were adhesive wear and delamination,while in the micro-slip regime were mainly fatigue wear.
出处
《摩擦学学报》
EI
CAS
CSCD
北大核心
2013年第4期413-419,共7页
Tribology
基金
江苏省科技创新与成果转化专项引导资金(BY2012083)
中国矿业大学研究生实践与科研创新课题专项基金项目(GSF122102)资助~~
