Anode Heat Transfer in GTA Welding

摘要

The physical relation among the arc plasma, the anode heat transfer and the weld penetration was shown. It was concluded that the electron temperature above the anode and current density distribution on the anode decided the heat input density distribution on the anode and then the heat input density on the anode rather than input power of the arc remarkably dominated the size of the weld penetration in the welding process by the free-burning argon arc. Furthermore, it was suggested that the cathode played the important role in the determination of the weld penetration in the welding process.