采用正交试验法对DP980冷轧双相钢进行了激光焊接工艺参数优化,采用Gambit软件对9组焊接工艺参数下的焊接接头的焊缝宽度和面积进行了数值模拟,并与实际焊缝测量结果进行了对比。结果表明,采用正交法得到DP980双相钢最优焊接工艺为:激光功率为1100 W、焊接速度为7 mm/s和离焦量为-2.5 mm;DP980钢激光焊接接头的焊缝正面宽度、背面宽度和横截面面积的数值模拟结果与实际结果具有较好的一致性。 The parameters of laser welding of DP980 cold-rolled dual-phase steel were optimized by orthogonal test. The width and area of ​​the weld joint of 9 welded joints were simulated by Gambit software and compared with the actual weld measurement The results are compared. The results show that the optimal welding process of DP980 dual phase steel is obtained by orthogonal method: the laser power is 1100 W, the welding speed is 7 mm / s and the defocus amount is -2.5 mm; the weld front width of DP980 steel laser welded joints , The back width and cross-sectional area of ​​the numerical simulation results with the actual results have good consistency.