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采用大气等离子喷涂制备了NiCrBSi/WC-Ni复合涂层,并采用高频感应加热的方法对涂层进行了重熔处理。与NiCrBSi涂层进行对比,分析了涂层截面的显微组织及涂层与基体界面的结合状况,对重熔前后的两种涂层进行了划痕测试,并对大气等离子喷涂制备的两种涂层在不同载荷进行了耐磨性测试。结果表明,感应重熔使得涂层由机械结合变为冶金结合,增强了涂层的内聚力;感应重熔后,NiCrBSi/WC-Ni复合涂层的附着力大幅度提高,涂层的孔隙率和显微硬度降低。NiCrBSi/WC-Ni复合涂层的显微硬度和耐磨性远高于NiCrBSi合金涂层。WC-Ni的添加没有对涂层的摩擦系数产生明显的影响。
NiCrBSi / WC-Ni composite coatings were prepared by atmospheric plasma spraying, and the coatings were remelted by high frequency induction heating. Compared with the NiCrBSi coating, the microstructure of the coating cross-section and the bond between the coating and the substrate interface were analyzed. The two coatings before and after remelting were scratched, and two kinds of coatings prepared by atmospheric plasma spraying The coatings were tested for wear resistance under different loads. The results showed that induction remelting changed the mechanical bonding to metallurgical bonding and enhanced the cohesion of the coating. The adhesion of the NiCrBSi / WC-Ni composite coating increased greatly after induction remelting. The porosity of the coating and Microhardness decreases. The microhardness and wear resistance of NiCrBSi / WC-Ni composite coatings are much higher than that of NiCrBSi alloy coatings. The addition of WC-Ni has no significant effect on the coefficient of friction of the coating.