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Dynamic observation of bainite transformation in a Fe-C-Mn-Si superbainite steel

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Abstract

The dynamic observations of bainitic transformation in a Fe-C-Mn-Si superbainite steel were conducted on a high temperature laser scanning confocal microscope. It is indicated that the mutual intersection of bainite sheaves often occurs during growth of bainite ferrite, resulting in an interlocked bainite microstructure. Moreover, bainite transformation is promoted by higher austenization temperature and the longer and finer bainite platelets are obtained. Further, The average growth rate of bainite after austenization at 1 100 ° is calculated as 5.8 µm·s−1. In situ observation investigation makes it possible to identify bainite transformation in real time during isothermal holding.

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Authors and Affiliations

  1. The State Key Laboratory of Refractories and Metallurgy, Hubei Collaborative Innovation Center for Advanced Steels, Wuhan University of Science and Technology, Wuhan, 430081, China

    Haijiang Hu  (胡海江), Guang Xu  (徐光), Zhengliang Xue & Mingxing Zhou

  2. State Key Laboratory of Development and Application Technology of Automotive Steels (Baosteel Group), Shanghai, 201900, China

    Haijiang Hu  (胡海江) & Yulong Zhang

Authors
  1. Haijiang Hu  (胡海江)
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  2. Guang Xu  (徐光)
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  3. Yulong Zhang
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  4. Zhengliang Xue
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  5. Mingxing Zhou
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Corresponding author

Correspondence to Guang Xu  (徐光).

Additional information

Fund by the National Natural Science Foundation of China (No. 51274154), the National High Technology Research and Development Program of China (No. 2012AA03A504) and the State Key Laboratory of Development and Application Technology of Automotive Steels (Baosteel Group) Project

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Hu, H., Xu, G., Zhang, Y. et al. Dynamic observation of bainite transformation in a Fe-C-Mn-Si superbainite steel. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 30, 818–821 (2015). https://doi.org/10.1007/s11595-015-1234-2

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  • DOI: https://doi.org/10.1007/s11595-015-1234-2

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