The invention discloses a conducting-stirring friction
hybrid heat source
welding method and a piece of equipment, wherein, in stirring
friction welding, a stir head and a workpiece are simultaneously insulated from the main body of a
welding machine, the clamp of a fixed workpiece and a worktable, current is galvanized in the
weld seam direction of the workpiece, the current and the
weld seam through which the current flows produce resistance heat with the
contact resistance of a friction stirring
welding area, and the resistance heat together with stirring friction heat forms the
hybrid heat source of the stirring
friction welding. The method and the equipment of the invention have the following remarkable effects: 1. the limitation of the stirring
friction welding on welding materials is broken through, leading the stirring friction welding to be used for welding such structural materials as black
ferrous metals,
superalloy, and the like; 2. the service life of the stir head can be improved; and 3. welding speed and welding quality can be further improved, thus improving the
mechanical property of a
welding joint. The method and the equipment of the invention can be used for the stirring friction welding, the preheating before welding, and the postweld heat treatment of such structural materials as
carbon steel, stainless steel, and
superalloy, etc.