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Effects of Variation of Heat Flux Released from the Meniscus on the Surface Shape of the Solidified Shell During Continuous Casting

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Abstract

Mold oscillations, widely used in continuous casting for infiltrating the mold flux between the mold and the solidified shell, change periodically the heat flux from the meniscus to mold. These variations of the heat flux affect the solidification behavior near an initial solidification position. Because the surface shape of the solidified shell is influenced by the initial solidification behavior, it is important to understand the relation between the mold oscillation, the heat flux and initial solidification behavior. In the present study, we developed a numerical model that simulates the flow and thermal behavior of the mold flux near the meniscus. Using this model, we analyze the effects of the variations of the heat flux from the meniscus on the initial solidification position and suggest the formation mechanism of the oscillation marks (OMs) and the hooks. Also, we will present quantitative results about the depth of the OMs and the length of the hooks at the conditions used in the present study. The factors that influence the hooks’ types and the causes of the irregularity of the shell surface are also discussed.

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Acknowledgements

The authors would like to express their gratitude to the Center for Iron and Steel Research at Research Institute of Advanced Materials (RIAM) in Seoul National University for their financial support of this work.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, Seoul National University, Seoul, 08826, Republic of Korea

    Yong-tae Kim & Kyung-woo Yi

  2. Center for Iron and Steel Research, Research Institute of Advanced Materials (RIAM), Seoul National University, Seoul, 08826, Republic of Korea

    Kyung-woo Yi

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  1. Yong-tae Kim
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Correspondence to Kyung-woo Yi.

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Kim, Yt., Yi, Kw. Effects of Variation of Heat Flux Released from the Meniscus on the Surface Shape of the Solidified Shell During Continuous Casting. Met. Mater. Int. 27, 5346–5359 (2021). https://doi.org/10.1007/s12540-020-00860-0

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