The design of stirring head is the key to the successful FSW,which determines the range of welding materials and their thickness.

• 搅拌头是搅拌摩擦焊技术的关键,它的好坏决定了搅拌摩擦焊能否扩大待焊材料的种类,能否提高待焊材料的板厚范围。