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Analysis of microstructure and mechanical properties of ultrafine grained low carbon steel

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Abstract

A novel design scheme of hot stamping, quenching and partitioning process was conducted in a quenchable boron steel to obtain the nanometric duplex microstructure comprising ultrafine retained austenite and martensite. It is shown that the materials possess excellent mechanical properties and the ductility can be further improved without compromising the strength. The newly treated steel shows excellent mechanical properties and the total elongation of the steel increases from 6.6% to 14.8% compared with that of hot stamped and quenched steel. Therefore, this kind of steel has become another group of advanced high-strength steels. The microstructure which is mainly responsible for such excellent mechanical properties was investigated.

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Authors and Affiliations

  1. School of Materials Science and Engineering, North University of China, Taiyuan, 030051, China

    Heping Liu  (刘和平), Feng’er Sun, Hu’er Sun, Bin Liu & Yi Wang

  2. School of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024, China

    Heping Liu  (刘和平)

  3. School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China

    Xuejun Jin

Authors
  1. Heping Liu  (刘和平)
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  2. Feng’er Sun
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  3. Hu’er Sun
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  4. Bin Liu
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  5. Yi Wang
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  6. Xuejun Jin
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Corresponding author

Correspondence to Heping Liu  (刘和平).

Additional information

Funded by the School Foundation of North University of China, the National Natural Science Foundation of China (Nos.51206081,51571141), Science and Technology Innovation Project of Shanxi Province(No.2016156), China Postdoctoral Science Foundation(No.2016M590214), Key Research and Development Program of Shanxi Province(No.201603D121002-3) and the Natural Science Foundation of Shanxi Province, China (Nos.2015011036, 2014011024-6)

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Liu, H., Sun, F., Sun, H. et al. Analysis of microstructure and mechanical properties of ultrafine grained low carbon steel. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 31, 1099–1104 (2016). https://doi.org/10.1007/s11595-016-1496-3

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  • DOI: https://doi.org/10.1007/s11595-016-1496-3

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