Achieving Excellent Strength-Ductility Balance and Lower Yield Ratio in a 690 MPa-Grade Multiphase Construction Steel

doi:10.1002/srin.202100750

CORC > 金属研究所 > 中国科学院金属研究所

	Achieving Excellent Strength-Ductility Balance and Lower Yield Ratio in a 690 MPa-Grade Multiphase Construction Steel
	Zhu, Wenting 1; Cui, Junjun 2; Feng, Yang 1; Chen, Zhenye 1,3; Zhao, Yang 4; Chen, Liqing 1
刊名	STEEL RESEARCH INTERNATIONAL
	2022-03-07
页码	11
关键词	low-carbon bainitic construction steel mechanical properties microstructures tempering thermo-mechanical controlled processing yield ratio
ISSN号	1611-3683
DOI	10.1002/srin.202100750
通讯作者	Chen, Liqing(lqchen@mail.neu.edu.cn)
英文摘要	In this article, thermomechanical controlled processing (TMCP) plus tempering (T) is adopted to acquire a novel 690 MPa-grade high-strength low-carbon bainitic construction structural steel, which has an optimum balance of strength-ductility and lower yield ratio (YR). The results show that the as-rolled steel consists of bainitic ferrite, lath-like bainite, and granular bainite. With an increase in the tempering temperature, a great deal of carbonitrides precipitates and maintains a small nano-scaled size without coarsening. Their interaction with dislocations induces an increase in strength. When the tempering temperature further increases, some grain boundaries between adjacent bainitic laths gradually blur or even disappear, and the average width of the bainitic laths increases to approximate to 860 nm. The recovery of bainitic laths is the main reason for the decreased strength. Due to the synergistic effect of the small dot-shaped martensite/austenite (M/A) constituents and grain boundaries misorientation distribution, maximum impact absorbed energy is achieved after tempered at 500 degrees C. Furthermore, the lower YR is achieved by appropriate control of strength difference between the soft bainitic ferrite and hard M/A constituents via tempering.
资助项目	National Natural Science Foundation of China[51904071] ; Independent Project of State Key Laboratory of Rolling and Automation, Northeastern University[ZZ202001] ; Key Research and Development Program of Hebei Province of China[18211019D] ; HBIS Company Limited[2019040200044] ; NEU[2019040200044]
WOS研究方向	Metallurgy & Metallurgical Engineering
语种	英语
出版者	WILEY-V C H VERLAG GMBH
WOS记录号	WOS:000765312400001
资助机构	National Natural Science Foundation of China ; Independent Project of State Key Laboratory of Rolling and Automation, Northeastern University ; Key Research and Development Program of Hebei Province of China ; HBIS Company Limited ; NEU
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/173204]
专题	金属研究所_中国科学院金属研究所
通讯作者	Chen, Liqing
作者单位	1.Northeastern Univ, State Key Lab Rolling & Automat, Shenyang 110819, Peoples R China 2.Chinese Acad Sci, Key Lab Nucl Mat & Safety Assessment, Inst Met Res, Shenyang 110016, Peoples R China 3.Technol Res Inst HBIS, User Technol Dept, Shijiazhuang 050000, Hebei, Peoples R China 4.Northeastern Univ, Sch Mat Sci & Engn, Shenyang 110819, Peoples R China
推荐引用方式 GB/T 7714	Zhu, Wenting,Cui, Junjun,Feng, Yang,et al. Achieving Excellent Strength-Ductility Balance and Lower Yield Ratio in a 690 MPa-Grade Multiphase Construction Steel[J]. STEEL RESEARCH INTERNATIONAL,2022:11.
APA	Zhu, Wenting,Cui, Junjun,Feng, Yang,Chen, Zhenye,Zhao, Yang,&Chen, Liqing.(2022).Achieving Excellent Strength-Ductility Balance and Lower Yield Ratio in a 690 MPa-Grade Multiphase Construction Steel.STEEL RESEARCH INTERNATIONAL,11.
MLA	Zhu, Wenting,et al."Achieving Excellent Strength-Ductility Balance and Lower Yield Ratio in a 690 MPa-Grade Multiphase Construction Steel".STEEL RESEARCH INTERNATIONAL (2022):11.