| 摘要 |
PURPOSE:To increase the speed of melting and to obtain a good deposited metal part by using a wire of a specific diameter as a consumable electrode and performing submerged arc welding with low heat input and with the welding current of a specific value by using an electric power source for pulse arc welding. CONSTITUTION:While weld metal is protected and refined by shielding the welding arc from atmospheric air by a flux 5, materials 1 to be welded are subjected to submerged arc welding with low heat input with a welding wire 2 by using a pulse arc power source 3 for transferring globules periodically and securely. Here, the diameter of the wire 2 to be used as a consumable electrode is set at 0.8-2.0mm.; at the same time, welding current is held in a 100-350A range, and the wire extension 9 of the wire 2 from a tip 8 is set at about 25-45mm., so that pulse arcs are generated in the welding slag. Thus globules are transferred efficiently to the objects 1. |
