Fundamental Investigation of Thermal Profile Control in Plate Rolling

Severe demand for thickness and flatness of steel plate has been increased, as users of steel plates are actively promoting the automation and abbreviation of processes. It is important to establish a shape control technology with higher accuracy in rolling process for TMCP steel plate that is produced by controlled rolling and accelerated cooling control process. In this study, to develop a new shape control technology in plate mill concerning the thermal profile control of a work roll, the thermal profile prediction model of a work roll with high accuracy has been firstly constructed by solving the two dimensional heat transfer equation with the perturbation method on thermal conductivity. Secondary, the change of thermal profile of a work roll in a rolling campaign has been investigated by using the newly developed thermal profile prediction model. It is verified that the thermal profile control as a new shape control technology can be realized with the variable roll cooling of work roll inplate mill.