Prediction of temperature evolution by FEM during multi-pass hot flat rolling of aluminium alloys

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Abstract
In rolling, deformation is applied by a series of passes, which are necessarily separated by holding periods between passes. The formation of the temperature profile therefore has a complex history. Accurate information on the time variation of temperature is essential for predicting microstructural development during hot working conditions and for the design of an acceptable rolling pass schedule. In the present paper, the finite-element method is employed to compute temperature changes under both laboratory and industrial breakdown rolling conditions. The calculated results are then compared with temperature records extracted from the literature. The difference between laboratory and industrial rolling is discussed. By using inverse analysis methods, appropriate heat transfer coefficients can be ascertained.