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为降低激光沉积修复钛合金基体的残余应力与变形,采用有限元参数化设计语言研究了不同激光扫描路径对修复基体残余应力与变形的影响,模拟了不同扫描路径下修复基体残余应力及不同修复层残余应力的分布情况,并对原因进行了分析。结果表明:不同扫描路径下基体两端残余应力值较大,修复层残余应力值两端高,中间低,采用层间交错扫描路径时,各修复层残余应力值大小和波动幅度降低,修复件表面平整度值最小。采用压痕法对不同扫描方式下修复件表面残余应力进行了测定,得到了不同扫描路径下基体变形曲线,并与模拟结果进行了比较,两者吻合较好,为提高激光修复质量提供了参考依据。
In order to reduce the residual stress and deformation of titanium alloy substrate by laser deposition, the effect of different laser scanning paths on the residual stress and deformation of the repaired substrate was studied by finite element parametric design language. The residual stress and deformation of substrate repaired under different scanning paths were simulated. Layer residual stress distribution, and the reasons were analyzed. The results show that the residual stresses at the two ends of the substrate under different scanning paths are large, the residual stresses at the two repaired layers are high at both ends and low in the middle. When the interlaminar scanning paths are crossed, the residual stress and the amplitude of the repaired layers decrease. Minimum surface smoothness value. Indentation method was used to measure the residual stress on the surface of the restoration under different scanning conditions. The deformation curves of the substrate under different scanning paths were obtained and compared with the simulation results. The results were in good agreement, which provided a reference for improving the quality of laser repair in accordance with.