采用不同激光加工参数对DP1180双相钢试样进行局部激光热处理,研究该加工工艺对双相钢成形性能的改善影响。结果表明,当激光加工温度为650~700℃时,试样塑性得到明显改善,伸长率从5%提高至17.4%左右,最大软化程度可达30%以上。通过对比分析模拟及由试验测得的双相钢中心位置的温度变化曲线,验证了激光热处理数值计算模型的合理性以及积分球测激光吸收率的准确性。 Different laser processing parameters of DP1180 duplex steel samples were laser heat treatment to study the processing of dual-phase steel forming performance improvement. The results show that when the laser processing temperature is 650-700 ℃, the plasticity of the sample is obviously improved, the elongation increases from 5% to 17.4% and the maximum softening degree can reach more than 30%. By comparing the simulation results with the temperature curves measured by the experiment, the numerical simulation models of laser heat treatment and the accuracy of the laser absorption rate of the integrating sphere are validated.