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A Thermal Simulation Method for Solidification Process of Steel Slab in Continuous Casting

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Abstract

Eighty years after the invention of continuous cast of steels, reproducibility from few mm3 samples in the laboratory to m3 product in plants is still a challenge. We have engineered a thermal simulation method to simulate the continuous casting process. The temperature gradient (G L ) and dendritic growth rate (v) of the slab were reproduced by controlling temperature and cooling intensity at hot and chill end, respectively, in our simulation samples. To verify that our samples can simulate the cast slab in continuous casting process, the heat transfer, solidification structure, and macrosegregation of the simulating sample were compared to those of a much larger continuous casting slab. The morphology of solid/liquid interface, solidified shell thickness, and dendritic growth rate were also investigated by in situ quenching the solidifying sample. Shell thickness (δ) determined by our quenching experiment was related to solidification time (τ) by equation: δ = 4.27 × τ 0.38. The results indicated that our method closely simulated the solidification process of continuous casting.

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Acknowledgements

The authors acknowledge the financial supports from the National Natural Science Foundation of China (Nos. 51227803, 51504148) and National Basic Research Program of China (Granted No. 2011CB012902). A portion of this work was performed at the National High Magnetic Field Laboratory, which is supported by the State of Florida and the National Science Foundation’s Division of Materials Research through DMR-0654118.

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Authors and Affiliations

  1. State Key Laboratory of Advanced Special Steel, Shanghai Key Laboratory of Advanced Ferrometallurgy, School of Materials Science and Engineering, Shanghai University, P.O. Box 275, 149 Yanchang Road, Shanghai, 200072, P.R. China

    Honggang Zhong (Lecture), Xiangru Chen (Lecture) & Qijie Zhai (Professor)

  2. Department of Mechanical Engineering Technology, Purdue University, 401 North Grant Street, West Lafayette, IN, USA

    Qingyou Han (Professor)

  3. National High Magnetic Field Laboratory, 1800 E. Paul Dirac Drive, Tallahassee, FL, USA

    Ke Han (Professor)

Authors
  1. Honggang Zhong
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  2. Xiangru Chen
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  3. Qingyou Han
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  4. Ke Han
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  5. Qijie Zhai
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Correspondence to Qijie Zhai.

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Manuscript submitted September 20, 2015.

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Zhong, H., Chen, X., Han, Q. et al. A Thermal Simulation Method for Solidification Process of Steel Slab in Continuous Casting. Metall Mater Trans B 47, 2963–2970 (2016). https://doi.org/10.1007/s11663-016-0660-7

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  • DOI: https://doi.org/10.1007/s11663-016-0660-7

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