东北大学学报:自然科学版 ›› 2018, Vol. 39 ›› Issue (3): 339-344.DOI: 10.12068/j.issn.1005-3026.2018.03.008

• 材料与冶金 • 上一篇    下一篇

Ti微合金化汽车大梁钢510L的组织性能

陈其源, 周晓光, 刘振宇, 吴思炜   

  1. (东北大学 轧制技术及连轧自动化国家重点实验室, 辽宁 沈阳110819)
  • 收稿日期:2016-10-18 修回日期:2016-10-18 出版日期:2018-03-15 发布日期:2018-03-09
  • 通讯作者: 陈其源
  • 作者简介:冯明杰(1971-), 男, 河南禹州人, 东北大学副教授; 王恩刚(1962-), 男, 辽宁沈阳人, 东北大学教授,博士生导师.陈其源(1992-),男,辽宁沈阳人,东北大学博士研究生; 刘振宇(1967-),男,内蒙古赤峰人,东北大学教授,博士生导师.
  • 基金资助:
    国家自然科学基金资助项目(51171041).国家重点研发计划项目(2017YFB0305000,2017YFB0304900); 辽宁省自然科学基金资助项目(2015020180).

Microstructure and Properties of Ti Microalloyed Automobile Frame Steel 510L

CHEN Qi-yuan, ZHOU Xiao-guang, LIU Zhen-yu, WU Si-wei   

  1. State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, China.
  • Received:2016-10-18 Revised:2016-10-18 Online:2018-03-15 Published:2018-03-09
  • Contact: ZHOU Xiao-guang
  • About author:-
  • Supported by:
    -

摘要: 通过层流冷却及卷取过程模拟实验和实验室热轧实验研究了冷却工艺参数对Ti微合金化汽车大梁钢510L组织性能的影响规律,并在生产现场进行了工业试制.结果表明,大冷速有利于弥散细小的TiC粒子析出,冷速和终冷温度对实验钢强度的影响是细晶强化、析出强化和相变强化共同作用的结果,N含量显著影响Ti的析出强化效果,在冶炼时应严格控制钢中的N含量,否则将对钢板的性能产生较大的影响.实现了低成本Ti微合金化汽车大梁钢510L的批量稳定生产.

关键词: Ti微合金化, 510L, 控轧控冷, 组织演变, 力学性能

Abstract: The effects of cooling process parameters on microstructure and mechanical properties of Ti microalloyed automobile frame steel 510L were studied by laminar cooling, coiling process simulation experiment and laboratory hot rolling experiment. Industrial trial production was made at the production site. The results showed that great cooling rate is advantageous to the precipitation of dispersed and fine TiC particles. The effects of cooling rate and final cooling temperature on the strength of the experimental steel include the joint action of precipitation strengthening, fine grain strengthening and phase transformation strengthening. N content significantly influences the precipitation strengthening effect of Ti. The N content in the steel should be strictly controlled during smelting, otherwise it will have a great influence on the properties of the steel plate. Mass stable production of Ti microalloyed automobile frame steel 510L with low cost has been realized.

Key words: Ti microalloyed, 510L, thermo-mechanical control process(TMCP), microstructure evolution, mechanical properties

中图分类号: