感应重熔-热处理对镍基碳化钨涂层的影响

发布时间：2018-09-10 19:42

【摘要】：为了进一步挖掘镍基碳化钨涂层的潜能,在40Cr基材上利用火焰喷涂制备Ni60+35%WC复合涂层并对涂层进行感应重熔及热处理,利用扫描电镜(SEM)、显微硬度计和摩擦磨损试验机分析测定了涂层的显微组织、显微硬度及摩擦磨损性能。结果表明,感应重熔使涂层与基材形成良好的冶金结合,涂层致密,硬度、耐磨性显著优于基材。经淬火及回火后,涂层硬度有所提高。850℃淬火,400℃回火的涂层硬度最高,达到866HV0.1,耐磨性也最好,磨损量仅为基材的43%。
[Abstract]:In order to further explore the potential of nickel based tungsten carbide coating, Ni60 35%WC composite coating was prepared by flame spraying on 40Cr substrate, and the coating was remelted by induction and heat treatment. The microstructure, microhardness and friction and wear properties of the coatings were analyzed by scanning electron microscope (SEM) (SEM), microhardness tester and friction and wear tester. The results showed that the coating formed a good metallurgical bond with the substrate by induction remelting, and the coating was compact, hardness and wear resistance was better than that of the substrate. After quenching and tempering, the hardness of the coating was increased to 866 HV0.1, and the wear resistance was the best. The wear rate was only 43% of the base material, and the hardness of the coating was the highest (866 HV0.1) after quenching and tempering at 400 鈩，

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