分析了光内同轴送粉激光熔覆技术堆积变径回转体时壁厚“越堆越薄、薄厚不均”现象的成因,提出控制离焦量来逐层补偿熔池液态金属流失的方法,以保持熔覆层宽度不变。基于大量的实验数据得出离焦量变化量与变径回转体斜率之间的关系式,从而可在堆积过程中根据变径回转体斜率的变化实时控制离焦量的变化。通过实时控制离焦量,同时控制送粉量与激光功率,得到了表面质量较好、壁厚均匀的几个典型的变径回转体。成形件的金相组织细密,力学性能优良。对成形件进行了硬度测量,总体硬度相对基体较高且分布均匀。 The reasons of the wall thickness, “thinner and thinner, thinner and thicker” are analyzed when the laser coaxial inner powder laser cladding technology is used to accumulate the variable diameter rotating body. It is put forward that controlling the amount of defocus to compensate the loss of liquid metal in the molten pool Method to keep the cladding width constant. Based on a large amount of experimental data, the relation between the amount of defocus and the slope of variable geometry rotor is obtained, which can control the change of defocus in real time according to the change of slope of variable geometry rotor. By controlling the defocus amount in real time and controlling the power of the powder and the laser power at the same time, several typical revolving bodies with good surface quality and uniform wall thickness are obtained. Forming parts of the microstructure of fine, excellent mechanical properties. The hardness of the molded part was measured. The overall hardness was relatively high and distributed uniformly.