Annealing process and microstructure evolution of cold-rolled low-carbon medium-manganese TRIP steels

被引：0
|
作者：
Li, Zhen [1 ]
Cheng, Xiao-Jie [1 ]
Cai, A-Yun [1 ]
Wen, Da [1 ]
Shi, Jing [1 ]
Zhao, Ai-Min [2 ]
机构：
[1] Beijing Shougang Cold Rolling Co Ltd, Beijing, China
[2] Engineering Research Institute, University of Science and Technology Beijing, Beijing, China
来源：
Cailiao Rechuli Xuebao/Transactions of Materials and Heat Treatment | 2014年 / 35卷 / 07期
关键词：
Annealing - Cold rolling - Low carbon steel - Plasticity - Steel sheet - Tensile strength - Metal cladding - Austenite - High strength steel;
D O I：
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学科分类号：
摘要：
The effects of annealing process on mechanical properties and the stability of retained austenite of third generation of AHSS of cold-rolled low-carbon medium-manganese TRIP steels were investigated. The results show that the mechanical properties are significantly influenced by intercritical annealing temperature and soaking time. When the samples of 6.72%Mn-TRIP steel are annealed at approximately 590 for 18 h, the tensile strength is 815 MPa and the elongation is 38%, the UTS×TE values in excess of 30 GPa·% can be obtained. During the intercritical soaking time, C and Mn atoms in the martensite have partitioned into retained austenite, thereby, the retained austenite can be stabilized at room temperature. Due to the combination of the retained austenite, martensitic and recrystallization ferrite, that the remarkable combinations of strength and ductility are obtained.
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页码：151 / 155
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