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Title: Hot strip interstand model and practical applications
Author: Cornelius, P. A.
Awarding Body: University of Wales Swansea
Current Institution: Swansea University
Date of Award: 2002
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Hot rolling is a highly complex physical problem. The difficult geometry and the hot deformation behaviour of Carbon strip steels during hot rolling render this process difficult to investigate during normal operations or within the laboratory. Numerical models can therefore be used to further understanding of hot rolling with their ability to predict variables that are difficult or even impossible to measure during normal hot rolling operations. A numerical model has been developed using the commercial ABAQUS Finite-Element software package to consider the effect of process variables such as temperature and microstructural evolution with their consequential effects upon the mechanical behaviour of the strip within a seven stand commercial finishing mill. The roll-gap has been described as a thermal-mechanical coupled plane-strain problem with thermal and microstructural algorithms describing the interstand periods. The hot deformation characteristics of a high Carbon material have also been investigated using multi-deformation testing methods within the laboratory and numerically described using constitutive modelling techniques. The numerical results include multi-pass thermal predictions and the calculation of microstructural evolution between successive deformations for high Carbon, Carbon Manganese and low Carbon strip steels. Rolling parameters such as rolling loads have been predicted as functions of strain, strain rate, temperature and retained strain from previous deformations. Rolling forces and thermal results have been shown to be in reasonable agreement with measured data from trials at the Corus strip mills at Port Talbot and Llanwern, Wales, UK. The research programme has developed constitutive relationships for a high Carbon steel and demonstrated that coupled thermal-mechanical and microstructural algorithms can create sensitive and accurate numerical simulations of commercial hot rolling.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Eng.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available