| Microstructure and Mechanical Properties of TRIP Steel with Annealed Martensite |
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| 引用本文： | WeiDING,Zhi-hua GONG,Bao-feng WANG,Di TANG,Hai-tao JIANG.Microstructure and Mechanical Properties of TRIP Steel with Annealed Martensite[J].钢铁研究学报(英文版),2014,21(5):527-531. |
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| 作者姓名： | WeiDING Zhi-hua GONG Bao-feng WANG Di TANG Hai-tao JIANG |
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| 基金项目： | Item Sponsored by National Natural Science Foundation of China （51304120）; Inner Mongolia Natural Science Foundation ot China （2012MS0803） ; Innovation Foundation of Inner Mongolia University of Science and Technology of China （2011NCL004） |
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| 摘 要： | The microstructure and mechanical properties of cold rolled TRIP steel containing C 0.2, Si 0.5, Mn 1.5, A1 1.3, and Nb-kV 0.13 （mass%） with annealed martensite （TAM steel） were investigated using optical microscopy, field emission gun scanning electronic microscope （FEG SEM）, transmission electron microscopy （TEM）, X-ray diffraction （XRD）, and mechanical testing. The mierostructure of the TAM steel mainly consisted of polygonal ferrite, bainite, annealed martensite and retained austenite. The martensite after annealing did not spheroidize, which consisted of annealed lath martensite structure and interlath second phase. Compared with the traditional TRIP steel with polygonal ferrite matrix （TPF steel）, the TAM steel has more excellent elongation rate over 32%. The TAM steel also has better strain hardening behavior than the TPF steel. The excellent elongation and strain harden- ing behavior of TAM steel result from high retained austenite stability of the TAM steel, which is attributed to its fine distribution and medium strength ratio of second phase to matrix.
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| 关 键 词： | TRIP钢 马氏体结构 力学性能 显微组织 退火 扫描电子显微镜 透射电子显微镜 残留奥氏体 |
| 收稿时间： | 30 November 2012 |
Microstructure and Mechanical Properties of TRIP Steel with Annealed Martensite |
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| Wei DING,Zhi-hua GONG,Bao-feng WANG,Di TANG,Hai-tao JIANG.Microstructure and Mechanical Properties of TRIP Steel with Annealed Martensite[J].Journal of Iron and Steel Research,2014,21(5):527-531. |
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| Authors: | Wei DING Zhi-hua GONG Bao-feng WANG Di TANG Hai-tao JIANG |
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| Affiliation: | 1. School of Material and Metallurgy, Inner Mongolia University of Science and Technology, Baotou 014010,Inner Mongolia, China 2. National Engineering Research Center for Advanced Rolling Technology,University of Science and Technology Beijing, Beijing 100083, China |
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| Abstract: | The microstructure and mechanical properties of cold rolled TRIP steel containing C 0. 2, Si 0. 5, Mn 1. 5, Al 1. 3, and Nb+V 0. 13 (mass%) with annealed martensite (TAM steel) were investigated using optical microscopy, field emission gun scanning electronic microscope (FEG SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), and mechanical testing. The microstructure of the TAM steel mainly consisted of polygonal ferrite, bainite, annealed martensite and retained austenite. The martensite after annealing did not spheroidize, which consisted of annealed lath martensite structure and interlath second phase. Compared with the traditional TRIP steel with polygonal ferrite matrix (TPF steel), the TAM steel has more excellent elongation rate over 32%. The TAM steel also has better strain hardening behavior than the TPF steel. The excellent elongation and strain hardening behavior of TAM steel result from high retained austenite stability of the TAM steel, which is attributed to its fine distribution and medium strength ratio of second phase to matrix. |
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| Keywords: | TRIP steel retained austenite annealed martensite mechanical property |
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