对试验用超高强热成型钢的电阻点焊工艺进行了研究,探讨了焊接电流对点焊接头压痕深度、焊核直径、焊透率以及拉断力的影响规律,讨论了电流模式对点焊试样断裂点位置和中心偏析的影响,分析了焊接接头软化区、中心偏析的原因。研究结果表明,该钢种具有良好的点焊性能。 The research on the resistance spot welding process of ultrahigh strength hot-forming steel for test is carried out. The influence of welding current on the indentation depth, core diameter, penetration rate and breaking force of spot welding joint is discussed. The location of fracture points and the center segregation of welded specimens were analyzed. The causes of softening and center segregation of welded joints were analyzed. The results show that the steel has a good spot welding performance.