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Study on Secondary Phase Precipitation Behavior of Ship Plate Steel Slab Under Different Cooling Rates in Continuous Casting Process

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TMS 2024 153rd Annual Meeting & Exhibition Supplemental Proceedings (TMS 2024)

Part of the book series: The Minerals, Metals & Materials Series ((MMMS))

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Abstract

The blank surface quality could be prevented through the control of the second phase precipitation. In this study, the precipitation behavior of carbon-nitrides was studied by a high-temperature confocal laser scanning microscope under the cooling rates of 0.1, 0.5, 1.0, 3.0, and 5.0 ℃/s. And the effects of cooling rate on the morphology and distribution of precipitates were obtained. The results show that the initial precipitation temperature and “fast-growing region” of carbon-nitrides are varied under different cooling rates. As the cooling rate increases, the nucleation location of carbon-nitrides changes from grain boundary to grain interior. Meanwhile, its size and quantity gradually decrease. When the cooling rate is larger than 1 ℃/s, the carbon-nitride mainly precipitates in grain interior. Combining the above research, a new secondary cooling method for ship plate steel slab is proposed and industrial tests are conducted, which improves the surface quality of the slab in continuous casting.

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Acknowledgements

The present work was financially supported by the independent subject of State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, China, (No. 41622007), Nanjing Iron & Steel Co., Ltd., China (No. 2020-0617), Xinjiang Bayi Iron and Steel Co., Ltd., China (No. 2015-275), Innovative & Entrepreneurial Talent Project in Jiangsu province, China (No. 2016A426) and Delong Steel Co., Ltd., China (No. 2019-0509).

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Authors and Affiliations

  1. State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing, 100083, China

    Huisheng Wang & Qing Liu

  2. Nanjing Iron and Steel Co., Ltd., Nanjing, Jiangsu, 225267, China

    Biao Tao & Ming Li

  3. Xinjiang Bayi Iron and Steel Co. Ltd., Urumqi, 830000, China

    Jun Wu

  4. Technology Center, Jiangsu Boji Spray Systems Co., Ltd., Yangzhou, 225267, Jiangsu, China

    Min Guan

  5. Delong Steel Co. Ltd., Xingtai, 054000, Hebei, China

    Weili Huang

Authors
  1. Huisheng Wang
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  2. Qing Liu
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  3. Biao Tao
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  4. Jun Wu
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  5. Ming Li
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  6. Min Guan
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  7. Weili Huang
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Correspondence to Qing Liu .

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    Wang, H. et al. (2024). Study on Secondary Phase Precipitation Behavior of Ship Plate Steel Slab Under Different Cooling Rates in Continuous Casting Process. In: TMS 2024 153rd Annual Meeting & Exhibition Supplemental Proceedings. TMS 2024. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-031-50349-8_96

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