Development of a FEM-model for the simulation of the transfer of surface structure in cold-rolling processes

Abstract

In the temper rolling process the effect of transferring the roll-surface structure to the steel sheet is purposively used to adjust a defined sheet-surface structure required for further processing. The objective of the investigation presented in this paper is to analyze the transfer behaviour specific to the electron-beam texturing technique (EBT) and, in addition to that, to develop a model for the simulation of these transfer characteristics. For this purpose in the first part the results of a study on the basis of rolling tests on an industrial temper mill are presented. These results do not only point out the basic transfer mechanisms - penetration processes and reverse extrusion phenomena - but beyond that also lead to an explanation of the transfer behaviour specific to the rolling conditions by the application of similarity numbers (substitute profile model). On the basis of these results in the second part a model is developed to simulate the transfer characteristics by the application of the finite element method (FEM).