Temperature and phase transformation strip cooled on the run-out table coupling prediction model of hot rolled strip cooled on the run-out table

A temperature and phase transformation coupling finite element model was established to calculate the temperature field of hot rolled strip cooled on the run-out table along thickness and width direction. In this model, each metal phase's physical parameters such as density, heat conduct coefficient, specific heat etc were considered to be functions of temperature and the linear mean value of all phases was used during calculation. Based on TTT curves of the material studied, Avrami function and Scheil additivity rule were used to calculate the latent heat of phase transformation, and the coupling solving of temperature and phase transformation was carried out. The results of simulation indicate that temperature difference exists along the thickness direction of strip and non-uniform temperature distribution along the width direction of strip, which match well with actual measurement on spot.