J. Phys. IV France 120 (2004) 209-215
DOI: 10.1051/jp4:2004120024

Modelling descaling during hot rolling of steel

J. Ramírez-Cuellar¹, M.P. Guerrero-Mata², L.A. Leduc¹ and R. Colás<sup>2

1</sup>  División Aceros Planos, Hylsa, S.A. de C.V., Mexico
²  Facultad de Ingeniería Mecánica y Eléctrica, Universidad Autónoma de Nuevo León, Mexico

Abstract
A computer model was developed to study the stresses that develop within the oxide formed on the surface of reheated steel slabs. The model considers that the crust grows during reheating following temperature dependent parabolic rates, and, as result of its thickness and growth rate, it will be stressed. Removal of this crust takes place by the impingement of water from high pressure jets installed in descaling units, which are located prior to deformation to avoid oxide imprint on the steel surface. Removal of the oxide layer depends on the velocity and amount of the water, as well as the force of the impact. A criterion based on these parameters can be established to determine the feasibility for oxide removal.

© EDP Sciences 2004