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Comparison and integration of final electromagnetic stirring and thermal soft reduction on continuous casting billet

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Abstract

Final electromagnetic stirring (F-EMS) and thermal soft reduction (TSR) are techniques that improve the inner quality of continuous casting billets, but they have rarely been applied simultaneously. The application effects of F-EMS and TSR were compared, and a process integrating F-EMS and TSR was adopted for a billet continuous caster. A heat transfer model was established to calculate the thermal behavior of 82A tire cord steel billet. The locations of F-EMS and TSR were determined, followed by conducting a series of plant trials, involving F-EMS alone, TSR alone, and the integrated process of F-EMS and TSR. The results showed that F-EMS or TSR could effectively improve the inner quality of the billet under their respective suitable working conditions. Moreover, F-EMS was found to be more helpful in terms of improving central segregation, while TSR tended to improve V-segregation, central porosity, and pipe. The integration of F-EMS and TSR allowed the advantages of each technique to be utilized, thereby better improving the inner quality. Among all the working conditions, 82A steel billet showed optimum inner quality when the current of F-EMS was 240 A and the cooling intensity of TSR was 2.2 m3 h−1. These findings demonstrate that the integration of F-EMS and TSR is promising for application on continuous casting billets.

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Acknowledgements

The authors acknowledge the financial support provided by the independent subject of State Key Laboratory of Advanced Metallurgy, University of Science and Technology Bei**g, China, grant number 41617003, which enabled the successful completion of the study.

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Authors and Affiliations

  1. State Key Laboratory of Advanced Metallurgy, University of Science and Technology Bei**g, Bei**g, 100083, China

    Yan-shen Han, Wei Yan, Jiang-shan Zhang, Wei-qing Chen & Qing Liu

  2. **angtan Iron & Steel Co., Ltd. of Hunan Valin, **angtan, 411101, Hunan, China

    Jun Chen

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  1. Yan-shen Han
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  3. Jiang-shan Zhang
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Correspondence to Qing Liu.

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Han, Ys., Yan, W., Zhang, Js. et al. Comparison and integration of final electromagnetic stirring and thermal soft reduction on continuous casting billet. J. Iron Steel Res. Int. 28, 160–167 (2021). https://doi.org/10.1007/s42243-020-00412-1

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  • DOI: https://doi.org/10.1007/s42243-020-00412-1

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