This work proposes a method for the optimisation of the parameters during the rolling of aluminium sheets in order to reduce its anisotropy index that is harmful during aluminium stamping works. The method suggested takes into account the evolution of the anisotropy index of a metal according to the hardening rate before annealing and dependent on the alloy type, the mode of reheating, the ranges of rolling and the conditions of annealing, as well as the variability of the various parameters. The results obtained show that the anisotropy index of products was reduced from 8% to less than 4% for aluminium sheets with thicknesses from 1.2 mm to 2.8 mm.
展开▼
