摘要
随着汽车工业的快速发展,对汽车用钢的高强度、轻量化要求越来越高。750 MPa级S700MC高强度微合金钢主要用于制造车辆纵梁、横梁和起重机的吊臂等。既要有高强度又要有良好的成形性能、低温冲击和焊接性能。研究了化学成分对高强微合金钢S700MC的影响及其强化机理,分析了控轧控冷工艺对其相变后组织的影响,制定了相应的加热、轧制、冷却工艺参数,并进行了工业试生产。试生产结果表明,750 MPa级微合金高强汽车钢生产工艺设计合理,产品的力学性能和成形性能良好,完全满足EN10149-2:2013的标准要求。
With the rapid development of the automobile industry,the requirements for high strength and light weight of automobile steel are becoming higher and higher.750 MPa high strength microalloyed steel S700 MC is mainly used to make crane arm,beam and crane which need high strength,good shaping performance,lowtemperature impact and welding performance.The influence of chemical composition on high strength microalloyed steel S700 MC and its strengthening mechanism were studied.The influence of controlled rolling and controlled cooling process on microstructure after phase transformation was analyzed,and the corresponding heating,rolling and cooling parameters were worked out,and the industrial trial production was carried out.The trial production results showthat the production process design of 750 MPa high strength microalloy automobile steel is reasonable,and the mechanical properties and forming properties of the products are good,which fully meets the requirements of EN10149-2： 2013 standard.
出处
《河北冶金》
2018年第1期10-14,25,共6页
Hebei Metallurgy
关键词
750
MPa级汽车钢
高强度
微合金化
热模拟
生产技术
750 MPa automobile steel
high strength
microalloyed
thermal simulation
production technology
