摘要
针对汽车轻量化发展需求,河钢集团邯钢公司成功研制出1000 MPa级高强贝氏体钢。本文考察了退火模拟实验中各关键工艺参数对实验钢性能的影响,根据退火规律制定工艺方案,并应用于工业化生产。结果表明,贝氏体含量随着快冷完结温度升高而逐渐增多;当快冷完结温度为400℃时,实验钢的强度随均热温度和缓慢冷却完结温度的降低而减小。通过工业试制成功开发出屈强比大于0.8的1000 MPa级贝氏体钢,其成形极限实验结果表明,在单向拉伸情况下,此材料最大主应变和最大次应变分别为0.29和-0.07,其成形极限危险点(FLD_(0))的应变值为0.13;在等双向胀形情况下,主次应变为0.36。
In order to meet the needs of lightweight development of automobiles,HBIS Group Hansteel company has successfully developed 1000 MPa high strength bainite steel.Through thermal simulation experiments,the influence of key process parameters during annealing on the performance of experimental steel was studied.Based on the annealing laws,a process plan was developed and applied to industrial production.The results show that the content of Bainite increases gradually with the increase of fast cooling termination temperature.At a fast cooling termination temperature of 400℃,the strength of the experimental steel decreases with the decrease of the soaking temperature and slow cooling termination temperature.Through industrial trial production,1000 MPa Bainitic Steel with yield ratio of more than 0.8 has been successfully developed.The forming limit test shows that the maximum primary and secondary strains of this material in uniaxial tension state are 0.29 and‒0.07,respectively,and the strain value of forming limit danger(FLD_(0))is 0.13.The primary and secondary strains in the state of equal bi-directional bulging are 0.36.
作者
贾亚飞
刘自权
刘鹏
马子洋
JIA Yafei;LIU Ziquan;LIU Peng;MA Ziyang(HBIS Group Hansteel Company,Handan 056015,China)
出处
《江西冶金》
2024年第1期65-70,共6页
Jiangxi Metallurgy
关键词
汽车板
高强贝氏体钢
力学性能
退火工艺
automotive sheet
high strength bainitic steel
mechanical properties
annealing process
