ABSTRACT

The heat transfer phenomenon in work rolls, used for hot rolling steel strip, has been modeled following two different approaches; the first integrating the heat flow, while the second was done integrating the temperature by means of the complex combination method, which lead at Bessel’s Modified Equation, and this, is rewritten in terms of Thomson functions. Both models were developed to compute the temperature distribution at steady-state in work rolls in a hot rolling mill, which are subject to successive heating and cooling cycles, obtaining as a result, a positive heat influx. The caused fatigue, it can originate some damage modes in the rolls, for that reason it is pertinent to know the thermal response in operating conditions to give them an appropriate maintenance to achieve effectiveness during the process. Besides, the models here presented, can be also employed to evaluate the effects that changes in operating conditions might cause, such as, the rolling speed, disposition of the cooling headers and thermal diffusivity effects. These approaches provides for a novel insight when certain rolling conditions are required in the industry.