Concept of thermal modelling for hot strip rolling of magnesium

Concept of thermal modelling for hot strip rolling of magnesium

Alexander Nam1, Uwe Prüfert2, Michael Eiermann2, Rudolf Kawalla1

1Institute of Metal Forming, Technische Universität Bergakademie Freiberg Bernhard von Cotta Straße 4, Freiberg, Germany.
2Institute of Numerical Analysis and Optimization, Technische Universität Bergakademie Freiberg Akademiestraße 9, Freiberg, Germany.

DOI:

https://doi.org/10.7494/cmms.2015.1.0498

Abstract:

The paper introduces a concept for the reversing hot rolling of magnesium strip consisting of reheating of twin roll casted rough strip, carrying of coil from a furnace to coiler, setting down on mandrel, uncoiling, hot rolling and coiling of the magnesium strip. In the first stage the thermal models should be established. These models shall serve in the subsequent stages in order to support by developing of a roll gap model as well as model for forecasting the microstructure and material properties of the magnesium strip. Moreover, the paper represents the state of the concept development of the thermal models. Up to now, the following technological steps are implemented: reheating of the coil, transport of coil from furnace to the coiler, setting down on the mandrel and uncoiling of coil. The modelling of these models is worked out in three dimensions and are calculated numerically by using the Finite Element Method.

Cite as:

Nam, A., Prüfert, U., Eiermann, M., & Kawalla, R. (2015). Concept of thermal modelling for hot strip rolling of magnesium. Computer Methods in Materials Science, 15(1), 23-29. https://doi.org/10.7494/cmms.2015.1.0498

Article (PDF):

Keywords:

Hot strip magnesium rolling, Heating, Numerical modelling

Publication dates:

Received: 29.10.2014, accepted: 20.12.2014, published: 10.01.2015

Publication type:

Original scientific paper

References:

Beck, J.V., Blackwell, B., Haji-Sheikh, A., 1996, Comparison of some Inverse Heat Conduction Methods using Experimental Data, Int J Heat Mass Tran, 3649–3657.

Kawalla, R., Ullmann, M., Oswald, M., Schmidt, Chr., 2006, Properties of Strips and Sheets of Magnesium Alloy Produced by Casting-Rolling Technology, Proceedings of the 7th International Conference on Magnesium Alloys and Their Applications, ed., Kainer, K.U., Dresden, Germany, 364–369.

Meyer, Th., 2005 Ein Beitrag zur Auslegung Temperierter Tiefziehwerkzeuge für die Umformung von Magnesiumfeinblechen., PhD thesis, TU Bergakademie, Freiberg.

Nam, A., Prüfert, U., Kawalla, R., 2014, Thermal Modelling for Production of Hot Strip of Magnesium Alloy, Journal of Machine Engineering, 14, 29–38

Ozisik, M.N., 1993, Heat Conduction, John Wiley & Sons, New York.
Prüfert, U., 2014, OOPDE – An Object Oriented Approach to Finite Elements in MATLAB, Quickstart Guide, http://www.mathe.tufreiberg.de/nmo/mitarbeiter/uwepruefert/software (access: November 2014).

Troyani, N., 1996, Nonlinear Geometrically Adaptive Finite Element Model of the Coilbox, Numer Heat Tr A-Appl, 849–858.

Troyani, N., Montano, L., 1999, A Temperature Predicting Model for Manufacturing Processes Requiring Coiling, Journal of the Brazilian Society of Mechanical Sciences, 655–663.