采用激光熔覆技术在纯铜表面制备Cr3Si+γ-Ni+Ni2Si(45Ni-26Cr-29Si)和Ni16Cr6Si7+Ni2Si(60Ni-10Cr-30Si)(原子数分数，%)两种Ni 基硅化物涂层。利用光学显微镜(OM)、扫描电子显微镜(SEM)、X 射线衍射(XRD)、能谱仪(EDS)、分析涂层不同的组织结构以及其形成原因。测试涂层的室温摩擦磨损性能。结果表明：组织为Cr3Si+γ-Ni+Ni2Si的涂层，平均硬度为1000 HV，500 g 载荷下压痕边角出现裂纹，平均摩擦系数为0.5；组织为Ni16Cr6Si7+Ni2Si 的涂层，平均硬度为900 HV；1000 g载荷下压痕边角没有裂纹产生，韧性较好，平均摩擦系数为0.5。

Two Ni-Cr-Si coatings of Cr3Si+gNi (45Ni-26Cr-29Si) and Ni16Cr6Si7+Ni2Si (60Ni-10Cr-30Si) (atomic fraction, %) are synthesized on pure copper using laser cladding. The microstructures of the coatings are analyzed by optical microscope (OM), scanning electron microscope (SEM), X - ray diffraction (XRD) and energy dispersive spectrometer (EDS). The wear resistance of the coatings is evaluated under ambient temperature. The results show that due to the different crystallization temperature ranges between binary phase and ternary phase, constitutional supercooling degrees are different in the process of crystallization and different microstructures are formed. The coating consisted of Cr3Si+gNi has an average hardness of 1000 HV and the friction coefficient of 0.5, but 4 cracks appear to the corner of indentation when loads add to 500 g. The coating consisted of Ni16Cr6Si7+Ni2Si with an average hardness of 900 HV, fine toughness of no cracks generating under loads of 1000 g, an average friction coefficient of 0.5 has good comprehensive performance than that of the coating consisted of Cr3Si+gNi.