摘要
河北钢铁集团承德钢铁集团有限公司依托钒钛资源优势,从钛微合金化技术生产低成本高强度钢的思路出发,通过强化铁水预脱硫及处理、严格控制钢中氮、氧气体含量,优化中间包结构,采用连铸保护浇铸技术及合理的轧制工艺,利用金相显微镜、扫描电镜、拉伸试验机、冲击试验机等检测设备,最终成功开发出化学成分最佳的600 MPa级汽车厢体用钢,生产结果表明:该钢板平均屈服强度达到566 MPa;平均抗拉强度达到655 MPa,并且组织均匀细小,具有较好冲击韧性及冷弯性能,完全满足用户的使用要求。
In view of the advantage of rich vanadium titanium resource in Chenggang pro- ceeding from the conception of production of the low cost and high strength steel using titanium micro-alloying technology the 600 MPa steel grade for automobile body use with optima[ chemical compositions is finally developed by implementation of a series of technological measures such as strengthening the hot metal desulphurization and pre- treatment process, strictly controlling the nitrogen and oxygen content in steel, optimi- zing the structure of tundish, implementing the CC protective casting technology and ra- tional rolling process and using the necessary check and evaluation means for instance the metalloscope, scanning electron microscope, tensile testing machine, impact testing machine and other means of detection. Results show that the average yield strength of the steel sheets comes up to 566 MPa, and its average tensile strength reaches 655 MPa, with advantages of homogeneous microstructure, better impact toughness and cold ben- ding property. That can completely satisfy requirements of customers.
出处
《炼钢》
CAS
北大核心
2012年第5期28-31,共4页
Steelmaking
关键词
钛
微合金钢
铁水预处理
连铸
titanium
microalloved steel
iron Dretreatment： continuous castina
