Roll-gap temperature models for hot mills

AbstractA knowledge of heat-transfer mechanisms in hot rolling is essential to the study of many areas of the process including mill pacing, slab- and strip-temperature control, roll thermal-camber effects on strip shape, thermally induced stress fatigue in rolls, and temperature-dependent yield-stress effects on roll force, power, and torque. Mathematical models which can be used to estimate temperature distributions within the rolls and steel strip on a hot mill are described in this paper. The roll-temperature model is an extension of a theory based on the idea of ‘rotating line sources of heat’, and the slab-strip model is based on the theory of heat conduction in a ‘semi-infinite body’.