Friction stir welding（FSW） is used to conduct different welding process contrast experiment of 3 mm thick 6005A alloy plate. Through the mechanical tensile,hardness,forward bending,macro metallographic and micro metallogra-phic analysis of the weld position,the optimal welding process is finally determined. Research shows that when the rotational speed of the friction head is 1 200 r·min,-1, and the welding speed is 700 mm ·min,-1,the mechanical tensile fracture occurs near the heat affected zone and the fracture surface shows "necking" phenomenon,the Vickers hardness distribu-tion is W-shaped,and there are small S-lines in the micro-structure. The mechanical value is higher than the standard and better than the other three welding parameters,which meets the production process requirements and provides technical support for the production process.
6005A aluminum alloyfriction stir weldingmechanicshardnessmacro metallographicmicro metallographicbending test