东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2015, Vol. 36 ›› Issue (3): 359-363.DOI: 10.12068/j.issn.1005-3026.2015.03.013

• 材料与冶金 • 上一篇    下一篇

热轧组织对高强度冷轧TRIP钢力学性能的影响

王超1 ， 丁桦1,2 ， 张君1   

  1. (1． 东北大学 材料与冶金学院， 辽宁 沈阳110819； 2． 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:2014-01-13 修回日期:2014-01-13 出版日期:2015-03-15 发布日期:2014-11-07
  • 通讯作者: 王超
  • 作者简介:王超(1986-)，男，山东菏泽人，东北大学博士研究生; 丁桦(1958-)，女，安徽合肥人，东北大学教授，博士生导师.
  • 基金资助:
    国家自然科学基金重点资助项目(51031001).

Effect of Hot Rolled Microstructure on Mechanical Properties of High Strength Cold Rolled TRIP Steel

WANG Chao1， DING Hua1,2， ZHANG Jun1   

  1. 1. School of Materials & Metallurgy， Northeastern University， Shenyang 110819， China; 2. State Key Laboratory of Rolling and Automation， Northeastern University， Shenyang 110819， China.
  • Received:2014-01-13 Revised:2014-01-13 Online:2015-03-15 Published:2014-11-07
  • Contact: WANG Chao
  • About author:-
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摘要： 采用扫描电镜、X射线衍射、拉伸试验等方法研究了热轧组织对含Al冷轧TRIP 钢热处理后组织与力学性能的影响.通过不同轧后冷却方式得到三种不同的热轧组织:组织细小的F+P+B试样；F+B试样；F+P试样.热轧组织细小的试样热处理后含有较多的粒状贝氏体和较少的残余奥氏体组织，强度最高达到996MPa，延伸率为20.8%.另两种试样组织为多边形铁素体、粒状贝氏体以及较多的残余奥氏体组织.F+B试样延伸率可达29.4%， 强塑积为26812.8MPa·%.F+P试样热处理后带状组织的危害不易消除.

关键词: TRIP钢, 热轧, 热处理, 微观组织, 力学性能

Abstract: The effect of hot rolled microstructure on the final microstructure and mechanical properties of the cold rolled TRIP steel containing Al was investigated by means of scanning electron microscope (SEM)， X-ray-diffraction (XRD) and tensile test. Three different kinds of microstructure， fine grains F+B+P， F+P and F+B， were obtained under different cooling processes. After heat treatment， the fine grains sample contained granular bainite and a few retained austenite. The tensile strength of the sample was 996 MPa and the elongation was 20.8%. The microstructure of other two samples was polygonal ferrite， granular bainite and some retained austenite. The elongation reached up to 29.4% and the strength-ductility balance of 26812.8MPa·% were obtained for F+B sample. The band structure of F+P sample was hard to eliminate after heat treating， which was harmful to final mechanical properties.

Key words: TRIP steel, hot rolled, heat treatment, microstructure, mechanical properties

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