Contribution to improving hydrodynamics method for hot strip rolling application

Abstract

The present work is a contribution to the improvement of the hydrodynamic method proposed by Si Li et al [2016] used to predict the pressures and the rolling speeds during hot rolling of aluminum strips. The hydrodynamic model gives good prediction however it is based on empirical coefficients that must be identified for each rolling case. Therefore, a critical analysis of the method has been first made and then a methodology for improving it has been presented. The improvement consists in coming out of the empiric coefficients and considering the variation of viscosity as a function of pressures. Results are much better in good agreement with the experimental data. The validated model can then be admitted as an improved hydrodynamic model for predicting pressures and velocities during hot rolling of thin strips.