以Fe3Al粉末为原料,采用激光熔覆工艺在低碳钢基体的表面制备了Fe3Al金属间化合物涂层。研究了激光熔覆功率对涂层质量的影响,实验在2.4~2.6kW功率下获得了良好的熔覆效果,涂层致密、无肉眼可见气孔、夹杂、无宏观裂纹并与基体完全冶金结合;涂层组织为粗大的块状晶团,晶团由微细片状Fe3Al相构成,电子衍射分析测定Fe3Al晶格常数为0.542nm;Fe3Al熔覆涂层的硬度为350~420HV,较铸态Fe3Al明显提高。 The Fe3Al intermetallic compound coating was prepared on the surface of low carbon steel by laser cladding using Fe3Al powder as raw material. The effect of laser cladding power on the coating quality was studied. The experimental results show that the coating has a good cladding effect at 2.4 ~ 2.6kW, the coating is dense and no macroscopic pores, inclusions and macroscopic cracks are formed and metallurgical bonding with the matrix is ​​achieved. The microstructure of the coating is coarse massive lumps, which consist of fine Fe3Al phase. The lattice constant of Fe3Al is 0.542nm by electron diffraction analysis. The hardness of Fe3Al coating is 350-420HV, which is obviously higher than that of Fe3Al improve.