METHOD FOR WELDING WITH A FRICTION STIR TOOL WITH OPTIMAL WELDING PARAMETER SEARCH

摘要

According to the invention, two factors influence the welding properties in welding with a friction stir tool: the dynamic flow of material at the point of welding (which principally affects the material flow and the production of a stable welding regime, the production of heat by plastic power and subsequently the microstructure) and the thermal history within the weld ( which influences the mechanism of precipitation and recrystallisation during the generation of the weld). In order to simplify the welding operations using a friction stir tool an analytical model was produced which expresses the welding properties as a function of the operational parameters of the welding, in particular the geometrical and kinematic parameters of the friction stir tool. According to the invention, the optimum welding conditions can more easily be selected using said model.