Friction stir welding is a solid-state connection method. In terms of connection principle, for the metal materials to be connected, as long as the material has a stirring head material that can work effectively in the forging state, the friction stir welding method can be used. to connect. In the past applications, the most successful application is on aluminum alloys, and great progress has also been made in the research on applications on copper alloys, magnesium alloys, zinc alloys, and lead alloys.

       The main applications in the aerospace field are: propellant storage for launch vehicles, fuel tanks for aircraft, cryogenic fuel tanks in spacecraft, and aluminum alloy thin-walled pressure vessels; skins for military or civil aircraft, aircraft wing panels , the auxiliary fuel tank of military aircraft, military or technological detection rockets, aviation engines, etc.

       The main applications in shipbuilding and marine industry are: tailor welding of ship decks, siding, clapboards and other plates, welding of aluminum extrusions, welding of hulls and reinforcements, welding of helicopter landing platforms, etc.
      With the deepening of research and the development of this technology, the scope of its application will become wider and wider.