Towards the Prediction of Damage Of Peritectic Steels During Continuous Casting Process

In the Continuous Casting (CC) process, products are sometimes rejected or called defective due to the presence of transversal cracks. This type of macroscopic damage is expected to be due to a ductility loss during cooling in the bending and unbending areas of the CC line. In order to study this damage, a 2D model has been developed to predict at the mesoscopic level the intergranular crack event taking into account the creep and diffusion of voids. Already validated for a microalloyed steel, the model is identified and used in this study to predict the crack formation for three different grades of peritectic steels. Results show encouraging predictions of the damage. These latter, which depend on the chemical composition, are discussed in terms of microstructure and experimental device.