汽车B柱高强度钢热冲压工艺

发布时间：2018-05-07 16:36

本文选题：Mn + B　；参考：《锻压技术》2017年02期

【摘要】：采用数值模拟与试验相结合的方法,研究了汽车B柱22Mn B5高强度钢热冲压成形工艺。根据对B柱零件结构的分析,设计模具型面,并合理添加压料板。建立B柱热冲压有限元模型,设置板料加热温度、模具温度、压料板的压力、冲压速度、淬火保压压力等工艺参数,确定工艺参数方案。对B柱热冲压进行全过程数值模拟,得到了热冲压件的厚度、微观组织、硬度等性能分布情况,并与试验结果进行对比。热冲压件性能检测结果表明:零件的厚度分布较均匀,最大减薄率小于25%,平均硬度达到470 HV以上,平均抗拉强度达到1400 MPa以上,显微组织为均匀板条状马氏体。成形后的B柱各项性能均满足热冲压技术规范要求,表明了该B柱热冲压成形工艺的可靠性。
[Abstract]:The hot stamping process of automobile B column 22Mn B 5 high strength steel was studied by means of numerical simulation and test. According to the analysis of the structure of the B-column parts, the die surface is designed, and the compacted plate is added reasonably. The finite element model of hot stamping for column B was established. The process parameters such as heating temperature of sheet metal, temperature of die, pressure of press plate, stamping speed, quenching and holding pressure were set up, and the process parameters were determined. The distribution of the thickness, microstructure and hardness of hot stamping parts was obtained by numerical simulation of the whole process of hot stamping of column B, and the results were compared with the experimental results. The results show that the thickness distribution of hot stamping parts is uniform, the maximum thinning rate is less than 25%, the average hardness is more than 470HV, the average tensile strength is more than 1400 MPa, and the microstructure is uniform strip martensite. All the properties of the formed B column meet the requirements of hot stamping technology specification, which indicates the reliability of the hot stamping forming process of the B column.
【作者单位】：合肥工业大学工业与装备技术研究院;合肥工业大学有色金属与加工技术国家地方联合工程研究中心;安徽江淮福臻车体装备有限公司;
【基金】：合肥工业大学博士学位人员专项科研资助基金(JZ2015HGBZ0136) 高等学校博士学科点专项科研新教师基金(2013JYXJ0653)
【分类号】：U466;TG306

【参考文献】