锌基镀层板热浴冲压成形工艺  

Hot bath stamping process on zinc-based coated sheet

作　　者：梁肖 杨助 彭则 刘培星 王子健 Liang Xiao;Yang Zhu;Peng Ze;Liu Peixing;Wang Zijian(Component Product Line Research Institute,Jiangxi HST Automotive Parts Co.,Ltd.,Jiujiang 332400,China;Shandong Iron and Steel Research Institute,Shandong Iron&Steel Group Rizhao Co.,Ltd.,Rizhao 276806,China;School of Iron and Steel,Soochow University,Suzhou 215137,China)

机构地区：[1]江西豪斯特汽车零部件有限公司零部件产品线研究院,江西九江332400 [2]山东钢铁日照有限公司山东钢铁研究院,山东日照276806 [3]苏州大学沙钢钢铁学院,江苏苏州215137

出　　处：《锻压技术》2025年第4期47-55,共9页Forging & Stamping Technology

摘　　要：为解决锌基镀层板热成形过程中液态金属脆性断裂和工艺成本高等问题,通过构建热浴预冷控温机制,开发了一种具有工业化潜力的热冲压成形新工艺。采用HBF1500GI热浴成形纯镀锌板制备右A柱下段加强板,研究奥氏体化参数与热水浸浴(80℃以上)协同作用下板料温度场的演变规律,采用金相分析、力学测试及扫描电镜进行表征,并对镀层表面密度分别为65和80 g·m^(-2)的镀锌板进行小批量试制。结果显示:该新工艺创新性地将成形温度稳定在M s点以上;工艺优化后的零件组织主要为马氏体及少量铁素体,抗拉强度达到1500 MPa;65 g·m^(-2)的镀锌板稳定性较高且微裂纹极少,裂纹尺寸均小于10μm,证明了镀锌板热浴冲压成形工艺的量产可行性。该工艺通过精确控制相变路径,为锌基镀层板规模化热成形提供了兼具稳定可靠与经济性的解决方案。In order to solve the problems of brittle fracture of liquid metal and high process cost in the hot forming process of zinc-based coated sheet,a new hot stamping process with industrial potential was developed by constructing a hot bath pre-cooling temperature control mechanism,and the reinforcement sheet in the lower section of right A-pillar was produced by HBF1500GI hot bath forming pure galvanized sheet to research the evolution law of temperature field for sheet under the synergistic effect of austenitizing parameters and hot water immersion(above 80℃).Then,the metallographic analysis,mechanical testing and scanning electron microscopy were used to characterize the sheet,and the small-batch trial production was carried out on the galvanized sheets with coating surface densities of 65 and 80 g·m^(-2),respectively.The results show that the new process innovatively stabilizes the forming temperature above the M s point.The microstructures of parts after process optimization are mainly martensite and a small amount of ferrite,with a tensile strength of 1500 MPa.The stability of 65 g·m^(-2)galvanized sheet is high and there are very few microcracks,the sizes of all microcracks are less than 10μm,which proves the feasibility of mass production for hot bath stamping process of galvanized sheet.The process provides a stable,reliable and economical solution for large-scale hot forming of zinc-based coated sheets by precisely controlling the phase transition path.

关 键 词：热浴冲压 锌基镀层板 热成形高强钢 力学性能 奥氏体化 

分 类 号：TG142.41[一般工业技术—材料科学与工程]