两相区轧制后淬火引入马氏体降低钢板屈强比

doi:10.12068/j.issn.1005-3026.2019.12.007

东北大学学报:自然科学版 ›› 2019, Vol. 40 ›› Issue (12): 1707-1710.DOI: 10.12068/j.issn.1005-3026.2019.12.007

两相区轧制后淬火引入马氏体降低钢板屈强比

沈鑫珺，李德志，唐帅，王国栋

(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:2019-04-11 修回日期:2019-04-11 出版日期:2019-12-15 发布日期:2019-12-12
通讯作者: 沈鑫珺
作者简介:沈鑫珺(1989-)，男，安徽淮南人，东北大学博士后研究人员；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:
博士后创新人才支持计划项目(BX201700301)；东北大学博士后基金资助项目(20180302).

Introducing Martensite to Reduce Yield Ratio of Steel Plates Rolled in Dual-Phase Region by Quenching

SHEN Xin-jun， LI De-zhi， TANG Shuai， WANG Guo-dong

The State Key Laboratory of Rolling and Automation， Northeastern University， Shenyang 110819， China.

Received:2019-04-11 Revised:2019-04-11 Online:2019-12-15 Published:2019-12-12
Contact: SHEN Xin-jun
About author:-
Supported by:
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摘要/Abstract

摘要： 晶粒细化和分裂增韧可使两相区轧制的层状超细晶钢板具有高强度同时韧性优异.前期研究发现轧后空冷生成的层状超细晶钢板，存在屈强比偏高的问题，高达0.9.本研究通过轧后淬火在层状超细晶组织中引入马氏体的方法降低屈强比.研究发现，在750℃和810℃轧制后淬火，层状超细晶组织中可生成体积分数约为14%的马氏体.此部分马氏体使拉伸过程中呈现连续屈服行为，提高加工硬化率，使钢板的屈强比降至0.7以下，解决了屈强比偏高的问题.此外，实验钢在具有高强度的同时，韧性优良.

关键词: 两相区轧制, 层状超细晶组织, 屈强比, 马氏体, 加工硬化率

Abstract: Grain refinement and delamination toughening can endow high strength and superior toughness to laminated and ultrafine-grained steel plates rolled in the dual-phase region. The previous study indicated that the laminated and ultrafine-grained steel plates possessed a high yield ratio up to 0.9 when air cooling was applied after rolling. In the present study， martensite was introduced to the laminated and ultrafine-grained steel plates by quenching after rolling to reduce the yield ratio. We found that martensite with a volume fraction of ~14% was generated by quenching followed by rolling at 750℃ or 810℃. Continuous yielding behavior was present during tensile testing due to the existence of martensite， and high work hardening rate was obtained. As expected， the reduced yield ratio lower than 0.7 was realized so that the problem that yield ratio was too high was solved for the laminated and ultrafine-grained steel plates. Moreover， high strength and good toughness were acquired.

Key words: rolling in the dual-phase region, laminated and ultrafine-grained microstructure, yield ratio, martensite, work hardening rate

中图分类号:

TG142. 1

沈鑫珺，李德志，唐帅，王国栋. 两相区轧制后淬火引入马氏体降低钢板屈强比[J]. 东北大学学报:自然科学版, 2019, 40(12): 1707-1710.

SHEN Xin-jun， LI De-zhi， TANG Shuai， WANG Guo-dong. Introducing Martensite to Reduce Yield Ratio of Steel Plates Rolled in Dual-Phase Region by Quenching[J]. Journal of Northeastern University Natural Science, 2019, 40(12): 1707-1710.

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两相区轧制后淬火引入马氏体降低钢板屈强比

Introducing Martensite to Reduce Yield Ratio of Steel Plates Rolled in Dual-Phase Region by Quenching

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