Effect of process parameters on mechanical behavior in hot-slab rolling

Abstract

This paper studies hot rolling process of typical low carbon steel by using rigid-plastic finite element method. Numerical simulations are carried out to examine the effects of the percentage of reduction rate, work-roll radius, frictional coefficient, rolling speed, tension, initial rolling temperature and initial slab thickness on rolling force and deformation behavior of the slab. It is found that rolling force increases with the increases of reduction rate, rolling speed, frictional coefficient and radius. The initial rolling temperature, initial slab thickness and tension have also important effects on rolling force, and it will decreases remarkably by increasing the parameters. Moreover, it is also found that rolling force remains unchanged when ini-tial slab temperature reaches certain value. The friction and effective stress distribution in the slab are obtained for the steady-state rolling process. The positive friction in back-ward slip zone is found to be greater than the negative fric-tion in forward slip zone along rolling direction, indicating that friction acts as the driving force in the rolling process.