Computer-aided Investigation of Mechanical Properties for Integrated Casting and Rolling Processes Using Hybrid Numerical-analytical model of Mushy Steel deformation

摘要

The main subject of the current paper is investigation of yield stress for C45 grade steel as well as development of a new methodology of such investigation. The method requires high accuracy model of semi-solid steel deformation. Hence, it requires a dedicated hybrid analytical-numerical model of deformation of steel with variable density. The newly developed methodology allows to compute curves depending on both temperature and strain rate. The experimental work has been done in Institute for Ferrous Metallurgy in Gliwice Poland using Gleeble thermo-mechanical simulator with high temperature testing equipment. A number of compression and tension tests have been done in order to verify the predictive ability of both the developed model and new, modified testing methodology. The comparison between numerical and experimental results is the supplementary subject of the presented paper, as well. The developed methodology allows reliable numerical simulation of deformation of semi-solid steel samples and calculation of realistic flow curve parameters.