Computer simulation of the thermal behaviour of a work roll during hot rolling of steel strip

The basis of a mathematical model able to predict the thermal response of a work roll in a continuous hot strip mill, under typical working conditions, is presented in this work. The model considers that the steady state is reached from dynamic conditions in such parameters as the length of the strip, the temperature variation along the length of the strip, and the temperature variation from the beginning to the end of the process. The phenomena taking place are considered at three different levels: (i) the independent cycle of the roll, (ii) rolling of a strip-rest, and (iii) a whole campaign. The three levels and their effects are then superimposed.