Chin J Mater Res  2011, Vol. 25 Issue (1): 45-50    DOI:

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Effects of Si on the Microstructure and Mechanical Property of Medium Mn Steel Treated by Quenching and Partitioning Process

ZHAO Hui 1,2, SHI Jie 2, LI Nan 1,2, WANG Cunyu 2,  HU Jin 1, HUI Weijun 2, CAO Wenquan2

1.Faculty of Materials and Metallurgical Engineering, Kunming University of Sci. & Tech., Kunming 650093 2.Central Iron & Steel Research Institute, Beijing 100081

ZHAO Hui, SHI Jie, LI Nan, WANG Cunyu, HU Jin, HUI Weijun, CAO Wenquan. Effects of Si on the Microstructure and Mechanical Property of Medium Mn Steel Treated by Quenching and Partitioning Process. Chin J Mater Res, 2011, 25(1): 45-50.

Abstract References Related Articles Recommended Metrics Download:  PDF(1072KB)  Export:  BibTeX | EndNote (RIS)       Abstract  Effects of Si on the microstructure and mechanical property of 20Mn5 steel and 20Mn5Si2 steel processed by quenching and partitioning (Q&P) were investigated. The microstructure characterization and austenite fraction measurement were carried out using scanning electron microscopy and x--rays diffraction. It was found that there is much more austenite fraction in the studied medium manganese steels than that of conventional TRIP steels and steels treated by Q&P process; and under same experimental condition, the austenite fraction in 20Mn5Si2 is significantly higher and fewer precipitated carbides than that in 20Mn5 steel. It was proposed that the larger fractioned austenite in Si--medium Mn steel results in the much lower yield stress and much higher product of tensile strength to elongation than that of the medium Mn steel without Si both processed by quenching and partitioning. Key words:  metallic materials       medium Mn steel       quenching and partitioning (Q&P)       TRIP effects       Si       high strength and high ductility      Received:  15 September 2010      ZTFLH:  TG115   Fund:  Supported by National Key Basic Research and Development Program of China No.2010CB630803, and National High-Tech Research and Development Program of China Nos.2009AA033401 and  2009AA03Z519. Service E-mail this article Add to citation manager E-mail Alert RSS （） Articles by authors DIAO Hui SHI Cha YU Cun-Yu HUI Wei-Jun CAO Wen-Quan URL:  https://www.cjmr.org/EN/     OR     https://www.cjmr.org/EN/Y2011/V25/I1/45 1 WANG Cunyu, Investigation on 30 GPa% Grade Ultrahigh–strength Martensitic–Austenitic Steels, Ph.D Thesis, Central Iron & Steel Research Institute(2010) (王存宇, 30GPa%级超高强度马奥组织钢的研究, 博士学位论文, 钢铁研究总院(2010)) 2 Jie Shi, Xinjun Sun, MaoqiuWang,Weijun Hui, Han Dong and Wenquan Cao, Enhanced work-hardening behavior and mechanical properties in ultrafine-grained steels with large-fractioned metastable austenite, Scripta Materialia, 63(8), 815(2010) 3 Jie Shi, Wenquan Cao and Han Dong. Ultrafine grained high strength low alloy steel with high strength and high ductility, Materials Science Forum, 654-656, 238(2010) 4 D.K.Matlock, V.E.Br(a)utigam, J.G.Speer, Application of the quenching and partitioning (Q&P) process to a medium-carbon high Si microalloyed bar steel, Mater. 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