The deformation behavior of high temperature steel plates for different surface heat transfer strength

Abstract

Cooling after hot rolling is an important part of hot rolling process, which affects the internal structure and quality of hot rolling products. In order to deeply understand the deformation degree for the different cooling intensity of up and down strip surface, the method of numerical simulation is adopted. The heat transfer coefficient for 5000W/(m2• °C ), 7500W/(m2• °C) and 10000W/(m2-°C), the change of the temperature distribution for the steel plate thickness and the position of the key nodes are studied. The results show that with the increase of the heat transfer coefficient ratio of the up and down surface, the temperature difference between the up and down surface of the strip increases gradually at first and then remains basically unchanged. Appropriately increasing the heat transfer intensity can improve the strip deformation along the width caused by the uneven heat transfer between the up and down surface.