As to Arc Phenomenon of Multiple Electrode Submerged Arc Welding

Abstract

In the submerged arc welding to analyze the transfer phenomenon of the metal (1) and the fo mation of the crater by arc in the covered flux (2), the X-ray radio photograph and oscilgraphic photograph tests are applied to the single electrode and multiple electrode welding. In taking the X-ray, the constant potential 280 KVP capacity to be used and the selected shutter speed of the photograph for transfering the metal and formation of the crater by arc to be 1/900 sec. and 1/50 sec. respectively. The A.C. welder and D.C. constant potential welder are to be used.
Judging from the X-ray radio and oscilograph tests being practiced it is presumed that the transfering metal of the submerged arc welding is transmitted (dropped) irregularly as the fine grain. And the condition of the crater which is made by arc in other works the shape of the weld puddle and the relative positions between the weld puddles and electrodes differ depending upon the welding current, speed, voltage and electrode distance in the case of the multiple electrode process. It also confirms the relation between the shape of the weld puddle and bead appearance and penetration as well as the distribution of the electric current in the parallel connection welding method.