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VERSION:2.0
METHOD:PUBLISH
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ORGANIZER;CN=ESTAD 2023:mailto:info@metec-estad.com
LOCATION:Room 27
SUMMARY:Characterization of thermomechanical effects in heavy plate hot rolling as a function of process settings
DESCRIPTION:As accuracy requirements for tolerances of heavy plates are continually increasing, precisely tuned process control is indispensable. The aim of this work is to characterize the relevant thermomechanical effects on a heavy plate mill depending on the pass configuration. This was done by performing a parametric study with a high-resolution 2D Finite Element (FE) offline model of the roll gap. Particular attention was paid to thermomechanical coupling. As a cross-section of the heavy plate moves through the roll gap, its temperature distribution is influenced by the heat flow within the plate, the heat exchanged with the work rolls, the heat generated by plastic deformation as well as frictional dissipation at the interface between work rolls and heavy plate. The implemented FE model considers the described effects as well as the elastic flattening of the work rolls. It also contains temperature dependent material behavior, identified by laboratory measurements, and a limit for the transmissible frictional shear stresses as a function of the current yield stress of the rolled material at its contacting surface. The calibration of non-measurable parameters like heat transfer coefficients and friction coefficients was accomplished based on a broad spectrum of measurement data extracted from the process. By incorporating all relevant physical phenomena, the employed FE model represents a benchmark for the prediction of the roll separating force, the roll torque, and the temperature distribution over the plate thickness. The results of the parametric study indicate which thermodynamic effects dominate in which area of the parameter range. Furthermore, they help to improve the overall comprehension of the system and open the door to the condensation of the model to a reduced online model that allows the calculation of one pass within milliseconds without substantial loss of accuracy. 
CLASS:PUBLIC
DTSTART:20230615T111000
DTEND:20230615T113000
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