2 GPa热成形座椅横梁开裂失效分析及工艺研究  

Analysis and Process Research on Cracking Failure of 2 GPa Hot Formed Seat Cross Beam

作　　者：祁学军 王新坤 陈嘉玥 薛福元 刘勇 许梦琦 Qi Xuejun;Wang Xinkun;Chen Jiayue;Xue Fuyuan;Liu Yong;Xu Mengqi(Voyah Automotive Technology Co.,Ltd.,Wuhan 430056)

机构地区：[1]岚图汽车科技有限公司,武汉430056

出　　处：《汽车工艺与材料》2024年第6期17-23,共7页Automobile Technology & Material

基　　金：湖北省科技重大专项课题(2022AAA001)。

摘　　要：为解决2 GPa热成形材料冲压的座椅横梁零件焊接后出现批量开裂的问题,经分析,该零件开裂为氢脆致裂,通过追查零件工艺发现引起零件氢脆开裂的原因为加热温度过高、加热时间过长、零件转移时间过长,通过正交设计改进零件不同的热冲压工艺组合并试制零件进行验证,最终确认2 GPa铝硅镀层热成形零件的热冲压工艺窗口为热成形的奥氏体化炉内露点须低于-5℃,加热时间为3~13 min,加热温度为880~940℃。To address the issue of batch cracking of seat crossbeam parts stamped with 2 GPa hot forming material after welding,this article analyzed and found that this part was cracked caused by hydrogen embrittlement.Through tracing the parts process,it was found that hydrogen embrittlement cracking was caused by factors such as high heating temperature,long heating time,and long part transfer time.Through orthogonal design,different hot stamping process combinations of parts were improved to verify the prototyped parts,it was finally confirmed that for the 2 GPa hot formed parts with hot stamping process window in hot-formed austenitizing furnace,dew point temperature shall be under-5℃,heating time of 3~13 min,and heating temperature of 880~940℃.

关 键 词：2 GPa热成形 氢脆开裂 热成形工艺 软模试制 

分 类 号：U465.11[一般工业技术—材料科学与工程]