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Modélisation thermomécanique de la coulée continue d'acier en deux dimensions

Abstract : In this work, we introduce a thermo-mechanical model of the steel continuous casting process, in two dimensions. With our approach, it is possible to obtain thermo-mechanical steady-state solution of the process, for the whole product. The thermo-mechanical history of the product can thus be deduced, by viewing the stress and temperature fields, for instance. One of the expected results deals with the bulging between rolls, which is known to give birth to segregation phenomena. We base our study on the global non steady-state strategy using a Lagrangian approach. The flow of matter in the studied domain is simulated through one injection tool located in the upper face of the domain. The lower face is supposed to be driven down at the starting block velocity. Thus the matter is led throughout the CC machine. Concerning the model, non-steady thermo-mechanical conservation equations are solved. The thermal problem is for the enthalpy variable. The approach to the mechanical problem is of monophasic type (velocity and pressure are the unknows). In our approach, natural convection and macrosegregation are neglected. Solid, mushy and liquid states obey respectively to elasto-viscoplastic, viscoplastic and Newtonian behaviours. The rheology of the solid state is calculated thanks laws from the litterature. The liquid and mushy states are modelled with high consistencies so that natural convection may be neglected. These developments have been validated on industrial cases, showing a good qualitative and quantitative agreement.
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https://pastel.archives-ouvertes.fr/pastel-00001342
Contributor : Ecole Mines Paristech <>
Submitted on : Tuesday, July 26, 2005 - 8:00:00 AM
Last modification on : Thursday, September 24, 2020 - 5:22:54 PM
Long-term archiving on: : Thursday, September 30, 2010 - 6:36:18 PM

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  • HAL Id : pastel-00001342, version 1

Citation

Alban Heinrich. Modélisation thermomécanique de la coulée continue d'acier en deux dimensions. Sciences de l'ingénieur [physics]. École Nationale Supérieure des Mines de Paris, 2003. Français. ⟨NNT : 2003ENMP1140⟩. ⟨pastel-00001342⟩

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