【摘要】 利用ＣＯ_２连续激光器，对耐热铸铁表面进行了Ｎｉ基ＷＣ、Ｎｉ基ＷＣ中加入少量稀土元素ＣｅＯ_２等合金粉末的激光熔敷，研究了不同成分激光熔敷层的高温硬度、高温干磨擦磨损性能，对摩擦磨损后的表面形貌进行了分析研究。试验结果表明Ｎｉ２１＋２０％ＷＣ＋０．５％ＣｅＯ_２熔覆层的高温性能较好。更多还原

【Abstract】 In this paper,two Ni-base WC coatings with and without rare earth element （CeO₂） were remelted on the surface of a heat-resistant cast iron by high power CO₂ laser. Their hardness and friction and wear behaviors at high temperature were investigated. The surface morphologies after wear were analysed by SEM. The results showed that the coating of Ni21+20%WC +0.5%CeO₂ displays the optimum high temperature performance.更多还原