采用6 kW横流CO2激光器在经正火处理的1Cr18Ni9Ti不锈钢基材表面激光熔覆了Ni60CuMoW+1.00%Ti合金粉末复合涂层，研究了涂层的物相结构、金相组织、显微硬度和耐蚀性能。X射线衍射(XRD)分析揭示出熔覆层除γ-(Fe,Ni）固溶体外，还含有NiCu、CrNiFeC、CuNiTi2、Mo9Ti金属间化合物和Ni2Si、Fe3Ni3B、WC、TiC等硬质相。光学显微观察显示，熔覆层组织均匀、致密，与基体结合良好。显微硬度测试得出涂层硬度最高出现在距表面0.5~1.0 mm范围内，其值达到649 HV。在质量分数5.0%的NaCl饱和溶液中的电化学分析结果表明，激光熔覆复合涂层的自腐蚀电位(Ecorr)比基体上升了192.8 mV，腐蚀电流密度降低了26.8%。综合比较得出，基材正火处理后的表面激光熔覆涂层耐腐蚀性能最好。

Ni60CuMoW+1.00%Ti alloy powder laser cladding composite coatings was fabricated on 1Cr18Ni9Ti stainless steel surface with normalizing treatment by 6 kW transverse-flow CO2 laser apparatus. The clad coatings was examined and tested for chemical composition, microstructure feature, phase structure, microhardness, corrosion behavior and metallography by X-ray diffraction (XRD), microhardness test, electrochemistry workstation and optical microscopy (OM), respectively. The results show that some new phases are formed in the cladding layer which consist of γ-(Fe, Ni) solid solution, intermetallic compound NiCu, CrNiFeC, CuNiTi2, Mo9Ti and harden phase Ni2Si, Fe3Ni3B, WC, TiC. OM observation displays that the microstructure of cladding layer is homogeneous, compactness and forming a good metallurgical bonding interface. Micro-hardness measurement exhibits that the highest hardness lies in 0.5~1.0 mm range from the surface and reaches 649 HV. Electrochemical corrosion test in 5.0% NaCl saturated solution indicates that the self-corrosion potential (Ecorr) of composite coating sample increases by 192.8 mV and the corrosion current density (Icorr) decreases by 26.8%. Compared with the substrate and the composite coating, the corrosion resistance of stainless steel with normalizing samples improved significantly.