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以Ni60-h BN复合粉末为原料,采用激光熔覆技术在304不锈钢表面制备自润滑耐磨复合涂层,将复合涂层在600℃下分别保温1 h和2 h以研究热处理对该复合涂层力学性能的影响,分析了热处理前后涂层的组织结构、硬度、纳米压痕和摩擦学性能的变化及其机理。结果表明:未经热处理涂层的显微硬度和γ-(Ni,Fe)固溶体的硬度分别为641.1 HV0.5和5.09 GPa,而经过1 h和2 h热处理涂层的显微硬度和γ-(Ni,Fe)固溶体的硬度分别为701.2 HV0.5、7.20 GPa和652.4 HV0.5、3.77 GPa。热处理1 h涂层的摩擦系数为0.4,磨损体积为0.0130 mm3,相对未做热处理以及热处理2 h涂层具有较好的耐磨减摩性能,Si3N4对磨球表面光滑,无明显塑性变形,磨损机理为轻微磨粒磨损。
Ni60-hBN composite powder as raw material, laser cladding technology was used to prepare self-lubricating wear-resistant composite coating on the surface of 304 stainless steel, the composite coating was incubated at 600 ℃ for 1 h and 2 h respectively to study the heat treatment of the composite coating Layer mechanical properties of the coating before and after the heat treatment changes in the structure, hardness, nanoindentation and tribological properties of the changes and its mechanism. The results show that the microhardness and the hardness of γ- (Ni, Fe) solid solution without heat treatment are 641.1 HV0.5 and 5.09 GPa, respectively, while the microhardness and γ- (Ni, Fe) solid solution were 701.2 HV0.5, 7.20 GPa and 652.4 HV0.5, 3.77 GPa, respectively. The friction coefficient of heat treatment 1 h coating was 0.4, the wear volume was 0.0130 mm3, the coating had better wear-resistant and friction-reducing properties than that without heat treatment and heat treatment for 2 h. The surface of Si3N4 ball was smooth without obvious plastic deformation and wear The mechanism is slight abrasive wear.