采用激光熔覆技术,通过在商用热喷涂粉末Ni25A合金粉末中复合添加强碳化物形成元素Ti、Zr和W并同时增碳,在45~#钢基体上制备了原位析出的颗粒增强镍基复合材料涂层。重点研究了向熔覆粉末中添加不同的稀土氧化物对熔覆层组织的影响。研究表明,稀土元素可以改善原位合成颗粒的形态、尺寸和密度,在镍基涂层中Y_2O_3的作用显著优于轻稀土氧化物的作用。 Laser cladding technology was used to prepare in-situ precipitated Ni-based particles by adding Ti, Zr and W into the hot-powder Ni25A alloy powder and adding carbon at the same time. Composite coating. The effects of adding different rare earth oxides on the microstructure of cladding layer were studied. The results show that rare earth elements can improve the morphology, size and density of in-situ synthesized particles. The effect of Y 2 O 3 in nickel-based coatings is significantly better than that of light rare earth oxides.