Modelling of Cooling and Recrystallization Kinetics during Self-Annealing of Aluminium Coils

Abstract

Study proposes a coil temperature model for aluminium alloys. The mathematical model is based on the 3D finite element method, which is implemented in MATLAB® using object-oriented programming approach. Owing to the used approach, several cooling steps of the coil can be performed including the coil transport and cooling in the storage area after the hot rolling. Individual cooling phases feature specific boundary conditions and time segments. The coefficients for the boundary conditions of the specific cooling phase were determined using parameter identification strategy. Furthermore, the temperature distribution of coil is used for the calculation the static recrystallization and grain size during coil cooling. The temperature model was validated within sufficient accuracy for each cooling phase using experimental data of the coil cooling after the conventional hot rolling at the Arconic’s plant in Samara, Russia.