SIMULATION OF THERMAL BEHAVIOR DURING STEEL SOLIDIFICATION IN SLAB CONTINUOUS CASTING MOLD I. Mathematical Model

doi:10.3724/SP.J.1037.2010.00663

Acta Metall Sin

2011, Vol. 47

Issue (6): 671-677 DOI: 10.3724/SP.J.1037.2010.00663

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SIMULATION OF THERMAL BEHAVIOR DURING STEEL SOLIDIFICATION IN SLAB CONTINUOUS CASTING MOLD I. Mathematical Model

CAI Zhaozhen, ZHU Miaoyong

School of Materials and Metallurgy, Northeastern University, Shenyang 110004

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CAI Zhaozhen ZHU Miaoyong. SIMULATION OF THERMAL BEHAVIOR DURING STEEL SOLIDIFICATION IN SLAB CONTINUOUS CASTING MOLD I. Mathematical Model. Acta Metall Sin, 2011, 47(6): 671-677.

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Abstract Thermal behavior of the solidifying shell in continuous casting mold is very important to final steel products. In the present work, one two–dimension transient thermal–mechanical coupling finite element model was developed to simulate the thermal behavior of steel solidifying in slab continuous casting mold by using the sequential coupling method. In this model, in order to get the physical properties of steel at high temperature, a microsegregation model which would give the relationship of phase fractions and temperature for acquiring the physical properties with δ/γ transformation in mushy zone was established. And the heat flux was obtained according to the displacement between the surface of solidifying shell and the hot face of mold as solidification contraction, the liquid/solid structure and distribution of mold flux, the temperature distribution of slab surface and mold hot face, and air gap distribution. In addition, the rate–dependent elastic–viscoplastic constitutive equation was applied to account for the evolution of shell stress in the mold.

Key words: slab continuous casting mold mold flux δ/γ transformation thermal behavior

Received: 09 December 2010

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Supported by National Outstanding Young Scientist Foundation of China (No.50925415) and Fundamental Research Funds for the Central University of China (No.N100102001)

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https://www.ams.org.cn/EN/10.3724/SP.J.1037.2010.00663 OR https://www.ams.org.cn/EN/Y2011/V47/I6/671

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