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采用焊接专用有限元分析软件研究了TIG焊接321不锈钢角焊缝的热过程,分析了不同热输入条件下的温度场分布、熔池形态,探索与接头适配的最优热源参数。采用试验方法验证了最优热源参数的可靠性,分析了相应热源参数下热循环曲线的特点。结果表明:基于仿真结果,取焊接电流为90 A、焊接速率为2.3mm/s进行实际焊接试验,焊缝横截面形貌的试验结果与模拟结果吻合良好,验证了所建立有限元模型的可靠性。
The thermal process of TIG welding of 321 stainless steel fillet welds was studied by using the finite element software for welding. The distribution of temperature field under different heat input conditions, the shape of the weld pool and the optimal heat source parameters were explored. The reliability of the optimal heat source parameters is verified by the test method, and the characteristics of the thermal cycling curve under the corresponding heat source parameters are analyzed. The results show that based on the simulation results, the actual welding test is carried out based on the welding current of 90 A and the welding speed of 2.3 mm / s. The experimental results of the cross-section of the weld are in good agreement with the simulation results, which verify the reliability of the established finite element model Sex.