东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2012, Vol. 33 ›› Issue (8): 1137-1140.DOI: -

• 论著 • 上一篇    下一篇

冷轧低碳钢快速加热过程中的相变规律

王小鹏;杜林秀;周民;   

  1. 东北大学轧制技术及连轧自动化国家重点实验室;
  • 收稿日期:2013-06-19 修回日期:2013-06-19 发布日期:2013-04-04
  • 通讯作者: -
  • 作者简介:-
  • 基金资助:
    国家自然科学基金资助项目(50527402)

Phase transformation law of cold-rolled low carbon steel during rapid heating

Wang, Xiao-Peng (1); Du, Lin-Xiu (1); Zhou, Min (1)   

  1. (1) The State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, China
  • Received:2013-06-19 Revised:2013-06-19 Published:2013-04-04
  • Contact: Wang, X.-P.
  • About author:-
  • Supported by:
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摘要： 以两种不同成分冷轧低碳钢为研究对象,利用Gleeble-3800热/力模拟实验机,研究了冷轧低碳钢在快速加热条件下,加热速度、化学成分对加热过程中相变规律的影响及连续加热过程中奥氏体晶粒尺寸的演变.研究结果表明,随着加热速度的增加(5~500℃/s),实验钢相变点的升高趋势先快后慢,100℃/s为转折点.在连续加热过程中存在奥氏体晶粒异常长大的温度转折点,为1 050℃;在850~950℃范围内,奥氏体平均晶粒尺寸均小于5μm;添加微合金元素有利于细化奥氏体晶粒.研究结果为利用快速加热、短时保温的方法获得冷轧超细晶钢提供了参考依据.

关键词: 快速加热, 冷轧低碳钢, 相变规律, 奥氏体

Abstract: For two cold-rolled low carbon steel with different compositions, the effects of heating rates and specimens' compositions on phase transformation during rapid heating were investigated using Gleeble-3800 thermal simulation testing machine, as well as the evolution of austenite grain size. The results show that the phase transformation temperature increases rapidly with increasing the heating rate from 5 to 100°C/s and then slowly from 100 to 500°C/s. There is a key temperature during continuous heating, i. e., 1050°C, at which austenite grains begin to grow abnormally. The average grain size is less than 5 μm at 850-950°C. Adding alloy elements is beneficial to refining austenite grains. The results provide a reference to obtain the cold-rolled ultrafine grained steel using the method of rapid heating followed by holding for a short time.

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