Numerical modeling of thermal evolution in hot metal coiling

Abstract

The use of coiling and uncoiling in the transfer table stage has important effects on the downstream temperature evolution throughout the hot bar in hot rolling, consequently, it has significant effects on both the uniformity of final mechanical properties and uniformity of final metallurgical properties. Consideration is given herein to the evolution of bar distribution of temperature in the transfer table, when coiling is present, in order to establish possible causes for the lack of the stated uniformity for eventual possible solutions. To address these issues, the mathematical equation of heat diffusion in a shape changing domain, is solved using a novel numerical strategy that uses both Finite Elements and Finite Differences. Numerical results are presented.