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 (8): 1105-1110.DOI: -

• 论著 • 上一篇    下一篇

变形及热处理制度对Q420厚板组织与性能的影响

李婧;赵德文;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:
    国家自然科学基金重点资助项目(50634030);;

Effects of deformation and heat treatment on microstructure and mechanical properties of Q420 heavy steel plates

Li, Jing (1); Zhao, De-Wen (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: Li, J.
  • About author:-
  • Supported by:
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摘要： 介绍了规格100 mm Q420特厚板的物理模拟过程,分析了不同变形和热处理工艺对Q420特厚板组织和性能的影响,并得出不同质量级别Q420厚板的最佳生产工艺.结果表明:采用TMCP工艺钢板的强度、塑性和韧性均优于采用UPR工艺的钢板,且相应位置铁素体晶粒较细小;热轧钢板正火热处理显著改善了钢的塑性和韧性,但是降低了钢的强度;不同热轧工艺厚板在相同的正火温度下,热处理后钢板的强韧性相差较小,热处理前的轧制方式对热处理后钢板的组织和性能影响不大.

关键词: Q420钢, 厚板, TMCP, 正火, 组织, 力学性能

Abstract: The physical simulation process of Q420 ultra-heavy steel plates 100 mm thick was carried out. The optimized production technologies of Q420 steel plates with different quality levels were obtained by analyzing the effects of deformation and heat treatment processes on the microstructure and properties of Q420 steel plates. The results showed that the steel plates rolled with TMCP(thermo-mechanical control process) process have better properties and finer ferrites than those rolled with UPR(ultra-heavy plate rolling) process. After heat treatment, the plasticity and toughness of the rolled plates are greatly enhanced, with the finer ferrites obtained, but the strength of the plates decreases. The steel plates normalized at the same temperature after different hot-rolling processes have little differences in the properties, showing the rolling processes have little impact on the microstructure and properties of the normalized plates.

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