Recrystallization Controlling in a Cold-Rolled Medium Mn Steel and Its Effect on Mechanical Properties

doi:10.11900/0412.1961.2022.00350

IMR OpenIR

	Recrystallization Controlling in a Cold-Rolled Medium Mn Steel and Its Effect on Mechanical Properties
	Hu Baojia 1,2; Zheng Qinyuan 1,2; Lu Yi 1,2; Jia Chunni 1; Liang Tian 3; Zheng Chengwu 1; Li Dianzhong 1
通讯作者	Zheng Chengwu(cwzheng@imr.ac.cn) ; Li Dianzhong(dzli@imr.ac.cn)
	2024-02-11
发表期刊	ACTA METALLURGICA SINICA
ISSN	0412-1961
卷号	60 期号:2 页码:189-200
摘要	Owing to the excellent combination of specific strength and ductility, medium Mn steels (MMSs) with Mn contents of 3%-12% (mass fraction) are considered the most promising candidates for the third-generation advanced high-strength steel. The combination of excellent strength-ductility is mainly attributed to the active transformation-induced plasticity effect of the metastable retained austenite during deformation. Therefore, producing a considerable amount of retained austenite with reasonable stabilities in the steel by various heat treatment schedules is always important. In this study, granular- and lamellar-structured retained austenites were developed in a cold-rolled 0.15C-5Mn MMS by introducing a technical process of precontrolling ferrite recrystallization in the annealing schedule. The microstructures of the annealed samples were analyzed using SEM, EBSD, and TEM. The results show that duplex microstructures comprising various amounts of recrystallized ferrite and fresh martensite can be obtained in the cold-rolled MMS when controlling the occurrence of recrystallization at different intercritical temperatures by a preannealing process. When this microstructure is used for the final austenite reverted transformation annealing, the resultant ultrafine duplex microstructure with recrystallized ferrite and two types of heterogeneous retained austenite, i. e., lamellar and granular, is produced. The heterogeneous-structured austenite shows more sensitivity to increasing strain, i. e., various mechanical stabilities, which enable an excellent strength-ductility combination and reduced Luders strain in the cold-rolled medium Mn steel.
关键词	cold-rolled medium Mn steel ferrite recrystallization retained austenite TRIP effect mechanical property
资助者	National Natural Science Foundation of China
DOI	10.11900/0412.1961.2022.00350
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[52071322]
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001153599200006
出版者	SCIENCE PRESS
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/184153
专题	中国科学院金属研究所
通讯作者	Zheng Chengwu; Li Dianzhong
作者单位	1.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 3.Chinese Acad Sci, Inst Met Res, CAS Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Hu Baojia,Zheng Qinyuan,Lu Yi,et al. Recrystallization Controlling in a Cold-Rolled Medium Mn Steel and Its Effect on Mechanical Properties[J]. ACTA METALLURGICA SINICA,2024,60(2):189-200.
APA	Hu Baojia.,Zheng Qinyuan.,Lu Yi.,Jia Chunni.,Liang Tian.,...&Li Dianzhong.(2024).Recrystallization Controlling in a Cold-Rolled Medium Mn Steel and Its Effect on Mechanical Properties.ACTA METALLURGICA SINICA,60(2),189-200.
MLA	Hu Baojia,et al."Recrystallization Controlling in a Cold-Rolled Medium Mn Steel and Its Effect on Mechanical Properties".ACTA METALLURGICA SINICA 60.2(2024):189-200.