利用CO2激光器,在45号钢表面熔覆Ni45-CaF2 -WS2粉末制备自润滑复合涂层,研究熔覆涂层微观组织和摩擦磨损性能及其影响规律.结果表明,熔覆过程中,WS2发生部分分解,形成新的润滑相CrxSy和CaWO4,CaF2的存在对熔池的流动性有极大的改善;涂层的室温及400 ℃摩擦性能测试也表明,复合自润滑涂层的摩擦因数显著降低,且Ni45-7.5CaF2-7.5WS2(质量分数,%)涂层的摩擦磨损性能较佳.
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