东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2011, Vol. 32 ›› Issue (11): 1562-1565.DOI: -

• 论著 • 上一篇    下一篇

一种桥梁用耐候钢的静态再结晶模型

吴红艳;杜林秀;刘相华;   

  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(51034009,50974039)

Study on static recrystallization model of bridge weathering steel

Wu, Hong-Yan (1); Du, Lin-Xiu (1); Liu, Xiang-Hua (1)   

  1. (1) 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: Wu, H.-Y.
  • About author:-
  • Supported by:
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摘要： 在MMS-300热/力模拟实验机上采用双道次压缩法,研究了桥梁用耐候钢在奥氏体区变形后道次间隔时间内的静态软化行为.分析了变形温度与间隔时间对静态软化行为的影响,采用应力补偿法计算了静态再结晶百分数.实验结果表明,在第一道次变形之后的5~10 s就发生了静态再结晶,变形温度、道次间隔时间对耐候钢的静态再结晶行为影响显著,变形温度越高,静态再结晶进行得越迅速.确定了耐候钢的静态再结晶激活能为190.57 kJ/mol,同时建立了静态再结晶动力学数学模型.

关键词: 耐候钢, 静态再结晶, 动力学模型, 激活能

Abstract: The static soften behavior of a bridge weathering steel within the interval of passes was investigated with double-pass compression method using MMS-300 thermal-mechanical simulator. The influence of temperature and interval time was analyzed and the softening percentage of static recrystallization under different conditions was defined by the 0.2% stress offset method. The results showed that the static recrystallization occurs after the first pass compression deformation of 5~10 seconds, deformation temperature and interval time have a significant effect on the static recrystallization behavior, and the higher the deformation temperature is, the faster static recrystallization proceeds. The static recrystallization activation energy of weathering steel is about 190.57 kJ/mol and the static recrystallization dynamics model is described.

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