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The application of friction stir welding on marine light alloy preformed structural parts has obvious advantages in appearance, weight, performance, cost and manufacturing time. It can be used not only for the manufacture of marine light alloy structural parts, but also for on-site use. Assembling, it provides a new connection method for modern shipbuilding. It is a leap forward in the development of modern welding technology to inform friction stir welding instead of welding to realize the manufacture of light alloy structural parts.
FSW technology has broad application prospects in the shipbuilding, marine industry and aerospace industries. The structures suitable for welding with FSW technology include: tailor welding of decks, siding, partitions, etc., welding of aluminum extrusions, hull and Welding of reinforcements, welding of helicopter landing platforms, etc. At present, this technology has been used to weld aluminum alloy structural members with a length of 20 m in the speedboat, and the total length of the weld is more than 500 Km.
At present, based on the great advantages of friction stir welding in welding methods, mechanical properties, manufacturing costs and environment, and potential industrial application prospects, in the field of shipbuilding, friction stir welding has been thoroughly researched and developed. Shipbuilding not only requires an increase in speed, but also requires an increase in unit price load performance, so the ship is manufactured with as much aluminum alloy as possible to reduce the weight of the ship. However, the traditional joining method of aluminum alloy materials is rivet joint and arc welding joint. Riveting increases the manufacturing time, manpower and material usage, while aluminum alloy is prone to deformation, defects and soot during welding, and also limits arc welding. The use of aluminum alloy components, so with the development of friction stir welding technology, the use of friction stir welding to achieve high integration of pre-formed modular manufacturing to replace the traditional ship to the plate - reinforcement structure manufacturing, is the shipbuilding technology The inevitable and revolutionary progress of development.