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Stress and Friction Distribution around Slab Corner in Continuous Casting Mold with Different Corner Structures

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Abstract

The non-uniform friction and thermal stress in the mold are important as causes of the transverse cracks around strand corner. To analyze the stress distribution features around strand corner, a three-dimensional thermo-elastoplastic finite-element mold model with different corner structures (right-angle, big-chamfer, multi-chamfer, and fillet) was established. The temperature field in the mold was indirectly coupled through a three-dimensional fluid flow and heat transfer model. In addition, the non-uniform mold friction stress loaded on the strand surface was calculated through a friction model. The results show that the stress distribution on the shell is similar to the temperature distribution. The stress concentration appears in the strand corner and the lower part of wide face. The friction stress enhances the corner stress around the edge of the air-gap. For chamfered molds, the stress around the corner between the wide face and chamfer face is larger than that between the narrow face and chamfer face. Around the corner region, both the stress peak and the area of the large stress zone of the right-angle strand are the largest, while those of big-chamfered, multi-chamfered, and fillet strands decrease in that order. The stress peak position of the chamfered strands is closer to the mold exit than that of the right-angle strand. Compared with the use of the right-angle mold, the application of chamfered molds is able to reduce the stress concentration around the strand corner.

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Acknowledgments

This work is financially supported by the Natural Science Foundation of China (NSFC), Project Nos. 51374260, 51504048 and 51611130062.

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Authors and Affiliations

  1. Laboratory of Metallurgy and Materials, College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, People’s Republic of China

    Sheng Yu, Mujun Long, Huabiao Chen, Dengfu Chen, Tao Liu, Huamei Duan & Junsheng Cao

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  1. Sheng Yu
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  2. Mujun Long
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  3. Huabiao Chen
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  4. Dengfu Chen
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  5. Tao Liu
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Correspondence to Mujun Long or Dengfu Chen.

Additional information

Manuscript submitted July 12, 2017.

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Yu, S., Long, M., Chen, H. et al. Stress and Friction Distribution around Slab Corner in Continuous Casting Mold with Different Corner Structures. Metall Mater Trans B 49, 866–876 (2018). https://doi.org/10.1007/s11663-018-1210-2

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