东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2013, Vol. 34 ›› Issue (6): 815-819.DOI: -

• 材料与冶金 • 上一篇    下一篇

轧制冷却工艺对低合金调质钢力学性能的影响

王超，李远远，王昭东，王国栋   

  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)
  • 收稿日期:2012-10-14 修回日期:2012-10-14 出版日期:2013-06-15 发布日期:2013-12-31
  • 通讯作者: 王超
  • 作者简介:王超(1986-)，男，河北沧州人，东北大学博士研究生；王昭东(1968-)，男，安徽怀宁人，东北大学教授，博士生导师；王国栋(1942-)，男，辽宁大连人，东北大学教授，博士生导师，中国工程院院士.
  • 基金资助:
    国家重点基础研究发展计划项目(2010CB630801).

Influence of Rolling and Cooling Process on Mechanical Properties of a Low Alloy Quenched and Tempered Steel

WANG Chao， LI Yuanyuan， WANG Zhaodong， WANG Guodong   

  1. The State Key Laboratory of Rolling and Automation， Northeastern University， Shenyang 110819， China.
  • Received:2012-10-14 Revised:2012-10-14 Online:2013-06-15 Published:2013-12-31
  • Contact: WANG Zhaodong
  • About author:-
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摘要： 通过采用不同的轧制和冷却工艺并进行再加热淬火和回火处理，分析各状态下的组织和力学性能以及不同轧态组织的再加热奥氏体化进程，研究了轧制冷却工艺对低合金调质高强钢力学性能的影响规律.结果表明，控制轧制能够增加轧态组织的原奥氏体晶界面积，提高再加热奥氏体形核率，得到较细化的再加热淬火组织，并且能够提高回火后的强韧性能.实验钢轧后连续水冷条件下得到马氏体组织，而空冷条件下得到的粒状贝氏体组织内碳元素分布不均匀，有利于提高再加热淬火回火后的强度.实验钢在控制轧制中断冷却工艺下能获得最佳的调质态力学性能.

关键词: 低合金调质钢, 力学性能, 控轧控冷, 奥氏体化, 淬火

Abstract: The influences of different rolling and cooling processes along with reheating quenching and tempering treatment on the microstructures， mechanical properties and reheating austenization progress of a low alloy quenched and tempered high strength steel were investigated. The results showed that the controlled rolling process increases the prior austenite grain boundary area and the reheating austenite nucleation rate. So the finer reheating quenching microstructure is obtained， and the strength and toughness after tempering are also enhanced. Lath martensite is obtained under continuous watercooling condition. Granular bainite is obtained under aircooling condition with uneven distribution of carbon element， which is beneficial to the strength after quenching and tempering. The mechanical properties are optimized by controlled rolling and interrupted cooling process after heat treatment.

Key words: low alloy quenched and tempered steel, mechanical properties, controlled rolling and controlled cooling, austenitization, quenching

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