Modélisation de la trempe gazeuse haute pression : application aux aciers de cémentation et de trempe

Abstract : The use of non vaporizable fluids such as gas to quench steel bodies makes the simulation of all the coupled physical phenomena involved in this heat treatment possible thanks to current numerical simulation tools. It gives access to the prediction of thermal, metallurgical and mechanical behaviour of steel pieces during quenching operation. Several authors have tried and build such kind of models in order to promote gas quenching use either by trying to replace less environmental friendly oil treatments or by trying to control distortions during or after quenching. In our work a model describing the physical coupled phenomena, from gas flow to distortion has been built step by step by coupling both commercial numerical codes Fluent and Sysweld. Simulation results have then been compared to gas flow velocities measurements (by PIV), temperature measurements and in situ distortions measurements (contour's detection method). This confrontation revealed a very good agreement between calculated and experimental data despite some slight differences, which have been analysed in detail. This validated the calculation method used in the model. One of the perspectives of this work could be the validation of the model for higher quenching rate. However, some industrial applications (tridimensional more complex bodies quenching simulation, quenching of full loads, ) can be run from now on with confidence
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Jean-François Douce. Modélisation de la trempe gazeuse haute pression : application aux aciers de cémentation et de trempe. Autre [cond-mat.other]. Institut National Polytechnique de Lorraine, 2008. Français. ⟨NNT : 2008INPL085N⟩. ⟨tel-01753044⟩

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