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Effect of Process Conditions on Residual Stress in Laser-MAG Welding of High Strength Steel

In this paper, the finite element method is used to simulate and analyze the laser-MAG composite welding of 4mm thick cylinder of high strength steel 30CrMnSiA, and the variation law of welding residual stress under different technological conditions is obtained. By comparing and analyzing the welding residual stress of the actual test plate by blind hole method with theoretical calculation value, the two methods are in good agreement, and the rationality of the model is verified.