为了提高材料耐磨性， 以Cr3C2和0.47Cr-0.50Ni-0.03Si合金粉末为原料，利用激光熔覆制备工艺，在A3钢表面制得了Cr7C3硬质相增强Cr-Ni-Si金属硅化物复合材料涂层; 利用光学显微镜、扫描电子显微镜、X射线衍射仪、能谱仪与电子探针等分析了涂层的显微组织，并在室温干滑动条件下测试其耐磨性能。结果表明，硬质颗粒相Cr7C3的加入，显著提高了Cr-Ni-Si金属硅化物涂层的硬度，涂层具有良好的室温耐磨性能。

A wear resistant Cr7C3 reinforced Cr-Ni-Si ternary metal silicide composite coating was fabricated on a substrate of A3 mild steel by means of laser cladding with Cr3C2 and 0.47Cr-0.50Ni-0.03Si alloy powder as the precursor material. The microstructure and composition of the coating were investigated by means of optical microscopy, scanning electron microscopy, X-ray diffraction, energy dispersive spectrometer and electron probe micro-analyzer. Then the wear resistance of the coating was tested under dry sliding wear condition at room temperature. Results indicated that, microhardness of the Cr-Ni-Si coating was evidently improved because of the introduction of Cr7C3. The laser clad Cr7C3 reinforced Cr-Ni-Si ternary metal silicide composite coating shows excellent wear resistance under dry sliding wear test conditions.