Multiphysics Approach to Model Solidification during Enamelling

F. Van den Abeele, and P. Goes
ArcelorMittal Research and Development, Ghent, Belgium

When an enamelled steel part is cooled down after firing, residual stresses are induced due to the difference in thermal dilatation between the enamel and the steel grade. At room temperature, the steel substrate is under tensile stress state, while the enamel is under compression.

The thermal stress distribution can be measured with a Klotz test device. Here, a cantilever steel/enamel sample is heated by an electric current, and the deflection of the specimen is plotted versus temperature.

COMSOL Multiphysics provides unique functionalities to perform coupled simulations that allow for validation of our thermo-mechanical models.

First, we calculate the electric current in the sample by means of the conductive media module. Then, the corresponding temperature distribution is obtained through a conductive heat transfer analysis. At the end, solutions for stresses and displacements are derived after a structural mechanics simulation.