粉末经过球磨混合均匀后,采用激光熔覆的方法,在45钢表面制备出 WC-Co 颗粒增强金属基复合涂层。用扫描电镜、能谱仪等,对熔覆涂层的显微组织结构等进行了分析观察。在 MM200环块磨损试验机上,对熔覆涂层在干摩擦滑动磨损条件下进行相同载荷和不同磨损距离的耐磨性能研究。试验结果表明:粉末球磨后的涂层硬度和耐磨性略低于未球磨的,但涂层组织更加均匀,磨损数据更加集中。 WC-Co particle reinforced metal matrix composite coating was prepared on the surface of 45 steel by laser cladding after the powder was mixed uniformly by ball milling. Using scanning electron microscopy, energy dispersive spectroscopy, etc., the microstructure of the cladding coating were analyzed and observed. On the MM200 ring block wear tester, the wear resistance of the coated coatings under the same friction and wear conditions was investigated under the conditions of dry friction sliding wear. The experimental results show that the hardness and wear resistance of the powder after ball milling are slightly lower than those of the non-ball milling, but the coating structure is more uniform and the wear data are more concentrated.