METHOD OF HIGH EFFICIENCY SUBMERGED ARC WELDING

摘要

PURPOSE:To obtain a good bead with high efficiency by passing a current at the specified high current density and by welding at high speed by utilizing the changing phenomenon of the main arc. CONSTITUTION:Plural electrode wires 12, 13 of <=2.5mm diameter are connected to one unit of the welding power source 10 having DC dropping characteristic via a torch/feeding terminal 11. The welding is performed so that the droplet particle with the wire diameter as the equivalent sphere diameter transfers at >=50pcs/sec by changing the main arc between the electrode wire 12, 13 by approaching the high speed and high current density >=50A/mm<2>. In this way the welding at high speed and high current density becomes possible and the welding efficiency can be increased.