Study on friction stir welding process of Al alloys
CAO Zhao-xia 1,2 , LIU Shu-hua 1,WANG De-qing 1, GAO Ping 3 (1.Dalian Railway College, Dalian 116011, China;2.Baotou Vocational Technical Institute, Batou 014030, China;3.No.52 Institute of China Ordnance Industries, Baotou 014034, China)
Friction stir welding is a novel solid-phase joining technique. In this paper, butt joint, fillet joint and longitudinal seam joint of pipes of 3mm thick aluminium alloy sheets carried out with FSW are introduced. The influence of the size and shape of welding heads and the process parameters on the weld quality are studied. The results of experiments show that the optimal size of cylindrical welding heads for 3mm thick aluminum alloy plates is that the diameter of shoulder is 9mm and the diameter of welding pin is 3mm. Utilizing this welding-head, high-quality joints can be achieved by FSW when the rotating speed is in the range of 1500rpm～2000rpm, the welding speed is in the range of 73mm/min～111mm/min and the pressure force is 218N.
【CateGory Index】： TG453.9