汽车防撞梁超高强钢热成形工艺研究  

Research on Ultra-high-strength-steel Hot Stamping Process of Automotive Anti-collision Beam

作　　者：庄百亮[1] 单忠德[1] 姜超[1] 戎文娟[1] 

机构地区：[1]机械科学研究总院先进成形技术与装备国家重点试验室,北京100083

出　　处：《中国机械工程》2012年第2期225-228,共4页China Mechanical Engineering

基　　金：国家科技重大专项(2009ZX04014-072);国际科技合作项目(2011DFA50810)

摘　　要：采用数值模拟与试验相结合的方法研究了防撞梁热冲压成形工艺。根据BR1500HS材料特性,通过数值模拟优化工艺参数,建立了冲压力与初始成形温度和冲压速度的关系模型,指出了冲压力变化趋势,并通过防撞梁热冲压试验验证了冲压力模型的可靠性。零件性能测试结果显示,热冲压件的厚度和硬度分布较为均匀:平均硬度为47.6HRC,最大减薄率为17%,零件抗拉强度达到1545MPa,最大残余应力只有抗拉强度的20%左右,回弹较小,组织为均匀板条状马氏体。Ultra--high--strength--steel hot stamping process of automotive anti--collision beam combining with numerical simulation and experiments were completed were completed. Through ana- lyzing the properties of the material BR1500HS, process parameters were optimized and a relational model among forming force, initial deformation temperature and pressing speed was built with the help of computer simulation as example of door beam,and the variation trend of forming ~orce was al- so shown clearly. The mechanical property testing shows that the hardness and thickness distribution of formed parts are uniformity; the average hardness is 47.6HRC and the largest thinning ratio is 17%, tensile strength of formed parts achieves 1545MPa which is 5 times as the maximum residual stress with little spring--back, and that microstructure of lath martensite is homogenous.

关 键 词：热成形 防撞梁 数值模拟 模型 

分 类 号：TH16[机械工程—机械制造及自动化]