以铸造WC作为增强颗粒, 配合NiBSi自熔合金粉末, 采用激光熔注技术制备WC/NiBSi颗粒增强复合材料层。利用XRD、SEM和EDS对复合材料层的物相和微观组织进行表征分析, 利用维氏硬度计对复合材料层沿深度方向进行测试分析, 进行了室温干滑动摩擦磨损实验, 分析了复合材料层的耐磨损性能。研究表明, 复合材料层相组成主要有WC、W2C、M6C、(Fe, Ni), 碳化物主要以块状和破碎状存在于金属基体。复合材料层的平均硬度分别为525.04 HV0.2(L)、543.05 HV0.2(M)和564.92 HV0.2(H), 较基材有显著提升。复合材料层的磨损体积分别为淬火态H13钢的45%(L)、33%(M)和21%(H), 耐磨损性能优异。

Casting WC particles were used as reinforced particles, and NiBSi self-fluxing alloy powders were used as match, laser melt injection technique was employed to prepared WC/NiBSi particle reinforced composite material layer. Using XRD, SEM and EDS to characterize the phase and microstructure of the composite layer, Vickers hardness tester to test and analyze along the depth direction of the composite layer. Pin-on-disk wear test was conducted at room temperature to analyze the wear resistance of the composite. Layer. Studies show that the phase composition of the composite material mainly includes WC、W2C、M6C and(Fe, Ni), carbides exhibit as blocks or crumbs in the metal matrix. The average hardness of the composite layer is 525.04 HV0.2(L), 543.05 HV0.2(M)and 564.92 HV0.2 (H), respectively, which is significantly higher than that of the matrix. The wear volume of the composite layer is respectively 45%(L), 33%(M)and 21%(H)of quenched H13 steel, excellent wear resistance.