为了降低残余应力对激光熔覆层性能的影响, 利用ANSYS软件建立了单层熔覆模型, 采用正交实验法来探究激光工艺参数(激光功率、扫描速度与光斑直径)对熔覆层残余应力的影响规律, 获得了优化的工艺参数。研究结果表明, 扫描速度及激光功率对残余应力的影响最大, 其次是光斑直径; 对获得的优化工艺参数组合进行了计算, 残余应力减低为192 MPa。为工艺试验参数选择提供指导。

In order to reduce the influence of residual stress on the quality of laser cladding layers, ANSYS software was adopted to establish a single-track model, the effect of process parameters on residual stress of cladding layers were investigated by using orthogonal test, and the optimized process parameters were obtained. The results show that scanning speed and laser power have greatly effect on residual stress, and next come spot diameter. The residual stress was calculated under the optimized process parameter combination, which is reduced to 192MPa. It provides guidance for selecting process parameters in experiments.