Two-dimensional Temperature Distribution of Strip in Preheating Furnace of Continuous Annealing Line

Two-dimensional temperature distributions of the steel strip are studied by the energy balance method with the aid of finite-element analysis. The space of the preheating furnace is divided into several enclosures in which the mechanisms of heat convection, heat radiation, and contact heat transfer are taken into account. The longitudinal and transverse temperature distributions of the strip are finally iteratively calculated by using the method of energy balance. The strip exhibits a significant temperature rise after contact with the rolls and shows a nonuniform temperature distribution along the width direction with smaller magnitude at two sides.