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采用机械球磨后激光熔敷方法,在WC-6%Co数控机床刀具表面制备石墨烯-Cr Al Ni复合涂层,并进行物相组成、显微组织分析,以及与Cr Al Ni常规涂层的耐磨损性能和抗氧化性能对比。结果表明,复合涂层由石墨烯、Ni Al相和Cr组成,显著改善数控机床刀具的耐磨损性能和抗氧化性能。与Cr Al Ni常规涂层相比,石墨烯-Cr Al Ni复合涂层25℃磨损体积减小66%、250℃磨损体积减小72%、500℃磨损体积减小74%,900℃高温氧化60 min后质量增加率减小91%。
The graphene-CrAlNi composite coating was prepared on the surface of WC-6% Co CNC tool with laser milling method after mechanical ball milling, and the phase composition, microstructure analysis, as well as the conventional coating with CrAlNi Wear and oxidation resistance performance comparison. The results show that the composite coating consists of graphene, Ni Al phase and Cr, which can significantly improve the wear resistance and oxidation resistance of CNC machine tools. The wear volume of graphene-CrAl Ni composite coating decreased by 66% at 25 ℃, the wear volume decreased by 72% at 250 ℃, the wear volume decreased by 74% at 500 ℃, and the oxidation at 900 ℃ After 60 min, the rate of mass increase was reduced by 91%.