利用超音速火焰喷涂技术在LZ50钢基材表面制备WC-27CrNi涂层.对WC-27CrNi涂层及其基体材料在干态不同角位移幅值下进行转动微动磨损试验,并利用扫描电子显微镜、能谱仪和3D轮廓仪对磨痕进行微观分析.试验结果表明:与基材相比,WC-27CrNi涂层在部分滑移区的运行范围向左移动,滑移区的运行范围增大.在部分滑移区,涂层的摩擦系数呈“跑和-爬升-稳定”3个阶段,明显低于基材,且损伤十分轻微;滑移区,涂层剥落的硬质颗粒使得稳定阶段摩擦系数高于基材,磨损机制为磨粒磨损、氧化磨损和剥层.
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