The 22MnB5-galvannealed steel is extensively used in the hot stamping process to produce car anti-collision structure parts. Furthermore, the resistance spot welding (RSW) is an important process in the automobile industry, especially in body construction, and the 22MnB5-galvannealed steels are a big challenge for the joining methods because their microstructure and mechanical properties are different from those of the conventional steels. In view of this, the present paper aims to optimize the parameters of the RSW process of the 22MnB5-galvannealed steel. Initially, the goal was to remove the galvannealed coating and in the next stage, the following responses were maximized: the nugget width, the nugget cross-sectional area, the penetration, the strength, the joint efficiency, and the energy absorption, whereas the indentation, heat affected zone and separation were used as constraints. The process parameters selected were the effective welding time, the effective welding current, the quenching time, and the upslope time. Response surface methodology (RSM) was applied jointly with the global criterion method based on principal components. The results of the multiobjective optimization are close to the individual targets for each response, highlighting the importance of considering the correlation structure presented in the responses.

中文翻译：

---

基于主成分分析的响应面法和整体判据法优化22MnB5-热镀锌钢的电阻点焊工艺

22MnB5镀锌钢被广泛用于热冲压过程中，以生产汽车防撞结构零件。此外，电阻点焊（RSW）在汽车工业中，特别是在车身制造中是重要的过程，并且22MnB5-镀锌钢对于连接方法而言是一个巨大的挑战，因为其显微组织和机械性能与常规技术不同。钢。有鉴于此，本文旨在优化22MnB5-热镀锌钢的RSW工艺参数。最初的目标是去除镀锌涂层，然后在下一阶段将以下响应最大化：熔核宽度，熔核横截面积，穿透力，强度，接头效率和能量吸收，而缩进，热影响区和分离被用作约束。选择的工艺参数为有效焊接时间，有效焊接电流，淬火时间和上升时间。响应面方法（RSM）与基于主成分的全局标准方法一起应用。多目标优化的结果接近于每个响应的单个目标，突出了考虑响应中呈现的相关结构的重要性。