论文部分内容阅读
利用真空熔烧方法在 45钢表面制备纳米金刚石粉和镍基自熔合金组成的复合涂层 ,利用扫描电镜分析了涂层的组织结构 ,测定了涂层的显微硬度 ,并利用SRV磨损试验机分析了涂层的摩擦学性能。试验结果表明 ,涂层主要由γ Ni固溶体和分布于其间的碳化物、合金渗碳体、合金碳化物和硼化物组成 ;复合涂层的硬度和耐磨性随着纳米金刚石粉加入量的增多而提高 ,并且当复合涂层中添加的纳米金刚石粉的质量百分含量在 0 8%～ 1 0 %时 ,其耐磨性能最好 ,摩擦系数可减小 6 0 %。
The composite coating composed of nano-diamond powder and nickel-based self-fluxing alloy was prepared on the surface of 45 steel by vacuum melting method. The microstructure of the coating was analyzed by scanning electron microscopy. The microhardness of the coating was measured. The tribological properties of the coating were analyzed. The results show that the coating mainly consists of γ Ni solid solution and the carbide, alloy cementite, alloy carbide and boride distributed between them. The hardness and wear resistance of the composite coating increase with the addition of nano-diamond powder , And the wear resistance is the best when the mass percentage of nano-diamond powder added in the composite coating is 0 8% ~ 10%, and the friction coefficient can be reduced by 60%.