用真空熔覆技术在ZG45表面制备出20％WC+Ni和5％G+20％WC+Ni复合涂层,研究了涂层的微观组织结构和常温摩擦磨损性能,揭示了磨损机理.结果表明:复合涂层由Ni基固溶体和Fe3Ni等硬质相组成,组织致密,与基体结合良好,微观组织具有定向凝固组织特征；涂层内和涂层与基体的结合界面处没有夹杂孔洞等缺陷；在摩擦参数相同的情况下5％G+20％WC+Ni涂层的摩擦系数及其波动范围和磨损量均低于20％WC+Ni涂层；20％WC+Ni涂层的磨损率随着频率的增大而增加,而5％G+20％WC+Ni复合涂层的磨损率的变化情况则相反；20％WC+Ni涂层以磨粒磨损与氧化磨损为主,5％G+20％WC+Ni涂层为微片层脆性断裂与氧化磨损为主.
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