Saldatura Friction stir tra estrusi e laminati

Nowadays, companies need to innovate their production techniques, both improving products and holding costs down, in order to meet market demands. Aluminium alloyed partlyfinished-products play an important role in the optimization of production processes, although assembling of extruded and rolled parts could result into great difficulties due to residual stresses and distortions. Thanks to its low thermal supply and high productivity rate, Friction Stir Welding (FSW) could provide a solution to such problems. The asymmetry of the FSW process induces different thermal supplies into the pieces to be joined. This can be an advantage when welding materials characterized by very different thermal capacity, as it happens by welding extruded and rolled products. This work is aimed to identify the optimal FSW parameters. Particular attention will be paid to heat supply in the welded materials, so compensate their different thermal capacity.