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Mechanical Properties of Steels Treated by Q-P-T Process Incorporating Carbide-free-bainite/martenite Mutiphase Microstructure

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Abstract

Quenching-parttioning-tempering (Q-P-T) process were applied to a quenched carbid-free bainite/martensite CFB/M) multiphase steel 40Mn2Si2Cr and its effect on the mechanical properties was studied. The results showed that the partitioning time of Q-P-T treatment can be increased greatly to 90 min or even longer. The tensle strength, elongation and product of strength and elongation (PSE) of the experimental steel can achieve 1650 MPa, about 20% and over 33 GPa · %, respectively. The significant increase of partitioning time and excellent mechanical properties could be related to the CFB microstructure introduced in the quenching process during the Q-P-T treatment.

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Authors and Affiliations

  1. Materials Science and Engineering Center, Beijing Jiaotong University, Beijing, 100044, China

    Zhun-li Tan (Doctor, Professor), Ki-kai Wang, Gu-hui Gao, Xiao-lu Gui & Bing-zhe Bai

  2. Key Laboratory of Advanced Materials, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China

    Bing-zhe Bai

  3. The Chinese Society for Metals, Beijing, 100044, China

    Yu-qing Weng

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  1. Zhun-li Tan
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  2. Ki-kai Wang
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  3. Gu-hui Gao
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  4. Xiao-lu Gui
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Correspondence to Zhun-li Tan.

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Foundation Item: Item Sponsored by National Natural Science Foundation of China (51271013); Key Project of Chinese Ministry of Railways (2012G011-C); Central College Basic Scientific Research Business Expenses Special Funds of China (2011JBZ021)

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Tan, Zl., Wang, Kk., Gao, Gh. et al. Mechanical Properties of Steels Treated by Q-P-T Process Incorporating Carbide-free-bainite/martenite Mutiphase Microstructure. J. Iron Steel Res. Int. 21, 191–196 (2014). https://doi.org/10.1016/S1006-706X(14)60029-7

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  • DOI: https://doi.org/10.1016/S1006-706X(14)60029-7

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