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以Ni-W-Si合金粉末为原料,利用激光熔覆技术在45号钢表面上制备了复合涂层,使用SEM、XRD与EDS等方法对涂层的显微组织、相组成进行了分析,讨论了不同W含量对涂层室温干滑动摩擦条件下耐磨性的影响。结果表明,W、W5Si3、WSi2及(Fe,Ni)固溶体使涂层的显微硬度显著提高(最高达1 040 HV),随着W含量降低,涂层的硬度下降,磨损加快。
The Ni-W-Si alloy powder was used as raw material to prepare the composite coating on the surface of steel 45 by laser cladding technique. The microstructure and phase composition of the coating were analyzed by SEM, XRD and EDS, The effects of W content on wear resistance under dry sliding friction at room temperature were discussed. The results show that the solid solution of W, W5Si3, WSi2 and (Fe, Ni) significantly increases the microhardness of the coating (up to 1 040 HV). With the decrease of W content, the hardness of the coating decreases and abrasion accelerates.