本文研究在１Ｃｒ１８Ｎｉ９Ｔｉ基体上采用激光熔覆和离子喷焊二种工艺形成的涂层对耐磨性的影响。使用５ｋＷ横流ＣＯ２激光器对预置在基体上的Ｃｏ基自熔合金粉末进行单道或多道扫描，得到的熔层与等离子焊层对比结果是：激光熔层缺陷率低，成品率高，其结构致密均匀，晶粒细小，成分稀释率更小，对基体热影响小，熔层硬度与强韧性更高。性能试验证明：激光熔层具有更高的抗擦伤磨损和抗冲击滑动高温磨损性能，耐磨性提高了一倍左右。 In this paper, we studied the effect of coating formed on the 1Cr18Ni9Ti substrate by laser cladding and ion spray welding. Using a 5kW cross-flow CO2 laser to scan the Co-based self-fluxing alloy powder pre-arranged on the substrate for single or multi-pass scanning, the result of the comparison between the melt layer and the plasma welding layer is that the laser melt layer has low defect rate and high yield, The structure is compact and uniform, the grain is small, the component dilution rate is smaller, the thermal influence on the substrate is small, the hardness and the toughness of the melt layer are higher. Performance tests show that: the laser melt layer has a higher resistance to abrasion and impact sliding high temperature wear resistance, wear resistance increased by about double.