Friction stir Welding technology was invented by The Welding Institute (TWI) in 1991, and applied for a patent in the United Kingdom the following year, and successively applied for patent protection in the world. "FSW" friction stir welding technology has attracted wide attention for its efficient and high-quality welding effect, and is known as the future road of metal welding.

TWI is mainly working with large companies such as aerospace, Marine, road transportation, aluminum and welding equipment manufacturers to develop this technology in the form of group sponsorship or cooperation and expand its application range. The Edisonwelding Institute (EWI) in the United States is also working on the FSW process in close collaboration with TWI. The United States Lockheed Martin Aerospace Company, Marshall Space Flight Center, the United States Naval Research Institute, Dartmouth University, the University of Texas, the University of Arkansas, the University of South Carolina, the University of Stuttgart in Germany, the University of Adelaide in Australia, and the Australian Welding Institute are all mixed from different angles Friction welding with mixed materials has been studied.

SWT is the world's only original use of "FSW" friction stir welding, the use of different types of aluminum alloy combined with A356.2 cast aluminum alloy, modular, low-carbon way to produce ultra-lightweight automotive wheels of high-tech enterprises, light quality and high safety performance, weight is lower than the traditional low-pressure casting products about 15%-20%.

Friction stir welding (FSW) is an advanced technique for welding materials by stirring them and in their plastic state. Compared with the traditional welding method, this technology has the advantages of low heat input, small deformation and high weld quality, and has gradually become the preferred welding process in aerospace, automotive industry and other fields.

This innovative welding technique uses a combination of rotation and pressure to generate enormous frictional heat between the contact surfaces of the materials and optimally joins them together in their plastic state by stirring the movement of the materials. Compared with the traditional fusion welding method, the weld produced by FSW is more uniform and strong. Moreover, because there is no molten metal in the welding process, the heat input is relatively low, and the deformation of the material is greatly reduced. FSW technology is not only suitable for common aluminum alloy and titanium alloy and other easy welding materials, but also has excellent results for magnesium alloy, copper alloy and other difficult welding materials.

In the future, this new welding technology characterized by efficient and high-quality welding will bring huge development opportunities for industrial manufacturing, and provide more reliable and efficient solutions for metal welding operations in all walks of life. With the continuous progress and improvement of technology, FSW will show its unlimited potential in more fields and become the welding technology that leads the development direction of metal welding in the future.