1. When welding light alloys, such as aluminum alloys, magnesium alloys, copper alloys, etc., the microstructure changes in the heat affected zone of the welded joint are small, the residual stress is relatively low, and the welded workpiece is not easy to deform

2. It can complete welding joints with long welds, large sections and different positions at one time, especially suitable for long straight welds, with high efficiency

3. The welding process is easy to automate, simple, low energy consumption, no other consumables, high efficiency, and low requirements for the operating environment

4. Friction stir welding does not need to add welding wire, does not need to remove the oxide film before welding when welding aluminum alloy, does not need inert gas shielding gas, and the cost is low

5. Friction stir welding can weld any grade of aluminum alloys, and can weld materials sensitive to thermal cracks, suitable for welding dissimilar materials

6. The welding process is safe, pollution-free, smoke-free, radiation-free, and green welding process in the true sense, etc.