东北大学学报(自然科学版) ›› 2021, Vol. 42 ›› Issue (1): 37-43.DOI: 10.12068/j.issn.1005-3026.2021.01.006

• 材料与冶金 • 上一篇    下一篇

ESP工艺下低碳钢奥氏体演变行为

周晓光, 王铎, 张东航, 刘振宇   

  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)
  • 出版日期:2021-01-15 发布日期:2021-01-13
  • 通讯作者: 周晓光
  • 作者简介:周晓光(1978-),男,辽宁辽中人,东北大学副教授; 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:
    国家重点研发计划项目(2017YFB0304901,2017YFB0304104).

Austenite Evolution in Low-Carbon Steel Under Endless Strip Production Process

ZHOU Xiao-guang, WANG Duo, ZHANG Dong-hang, LIU Zhen-yu   

  1. State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, China.
  • Online:2021-01-15 Published:2021-01-13
  • Contact: ZHOU Xiao-guang
  • About author:-
  • Supported by:
    -

摘要: 通过楔形铸坯直接轧制和带有中间坯补热工序的大道次变形量热轧实验,研究了铸坯直接轧制、大道次变形量以及中间坯补热工序对奥氏体组织演变的影响,并与常规热轧工艺进行了对比.结果表明:随铸坯压下率增加,变形后奥氏体晶粒尺寸逐渐细化.与铸坯再加热轧制工艺相比,当压下率为48%,53.6%和66.7%时,铸坯直接轧制工艺的奥氏体晶粒较为粗大,压下率为72.3%时,其变形组织更为细小均匀.与常规工艺相比,粗轧阶段大道次变形量促进奥氏体再结晶;中间坯补热工序提高了奥氏体晶粒尺寸均匀化程度.

关键词: ESP工艺;铸坯;奥氏体;变形量;中间坯补热

Abstract: The effects of the direct rolling of cast billet, large pass deformation and intermediate billet heating on microstructure evolution of austenite in low-carbon steel were studied in direct rolling experiment of wedge-shaped cast billet and hot rolling experiment of large pass deformation with intermediate billet heating, and were also compared with austenite evolution in the conventional hot rolling process. The results show that grain size of the austenite decreases gradually with increasing the reduction rate. Compared with the reheating rolling process, the austenite grains after the direct rolling process are coarser in the reduction rate of 48%, 53.6% and 66.7%, while the deformed microstructure becomes finer and more homogeneous when the reduction rate is 72.3%. In comparison with the conventional hot rolling process, the large pass deformation promotes austenite recrystallization in the rough rolling stage, while the intermediate billet heating process improves the uniformity of grain size in the austenite.

Key words: endless strip production (ESP) process; cast billet; austenite; deformation amount; intermediate billet heating

中图分类号: