METHOD FOR CONSUMABLE NOZZLE TYPE TWO ELECTRODE ELECTRO-SLAG WELDING

PURPOSE:To uniformize the weld penetration in an electro-slag welding for an extremely thick steel. CONSTITUTION:In to a groove formed by surrounding with patches 3, 4 and base materials 1, 2, two pieces of electric supplying nozzle 80, 90 are inserted and synchronously shaken in the same direction as these arranging direction and once stopped at the groove end part and near the center part of the groove. Electric current energy Wm at the time of shaking the electric supplying nozzles 80, 90, the electric current energy Wh at the time of stopping at the groove end part and the electric current energy Wc at the time of stopping at near the center part of the groove are made to Wc< Wm< Wh. The welding of the extremely thick steel is executed with the simple and uniform weld penetration to obtain the excellent toughness without any defect.