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为了制备高性能耐磨带,提高工件的使用寿命,利用激光宽带熔覆技术在17-4PH不锈钢表面沉积镍基合金做为过渡层,然后熔覆球形WC/Ni基复合涂层。对激光熔覆层分别采用扫描电镜(SEM)、能谱仪(EDS)、X射线衍射(XRD)等检测分析手段进行形貌观察、成分分析、物相表征等,并使用MMG-10型摩擦磨损试验机进行涂层耐磨性能测试。研究结果表明,采用激光熔覆技术可制备高质量WC/Ni基复合涂层,碳化钨质量分数达到65%,涂层冶金质量、裂纹尺寸、稀释率等满足技术要求。复合涂层的耐磨性为镍基合金的15倍,但其平均摩擦系数(0.926)高于镍基合金(0.762)。
In order to prepare high-performance wear-resistant tape and improve the service life of the workpiece, a laser-based wideband cladding technique was used to deposit Ni-based alloy on the surface of 17-4PH stainless steel as the transition layer and then cladding the spherical WC / Ni-based composite coating. The laser cladding layer was characterized by SEM, EDS and XRD, respectively. Morphology observation, composition analysis and phase characterization were carried out. The MMG-10 friction Wear tester for coating wear resistance test. The results show that high quality WC / Ni-based composite coatings can be prepared by laser cladding technology, the mass fraction of tungsten carbide reaches 65%, metallurgical quality, crack size and dilution rate meet the technical requirements. The wear resistance of the composite coating is 15 times that of the nickel-based alloy, but its average friction coefficient (0.926) is higher than that of the nickel-based alloy (0.762).