長方形断面電極法によるサブマージアーク溶接法の研究

概要

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In the case of submerged arc welding using conventional wire, bead width becomes narrow and penetration becomes deep when high current is used. If an electrode has rectangular section, good welding results are obtained without welding defects even at higher current and welding speed. From the observation on the arc phenomena, it is made clear that arc roots move from one edge to another edge of the electrode in the direction of electrode width. The penetration is formed by thermal transfer caused by molten metal flows. In the low current region, surface flow of molten metal makes wide bead. When welding current is increased, bottom flow is becomes active and makes deep penetration. Then, the nuggest becomes bowl section type. By skewing the electrode, the center of bead deviates from the weld line and cross section of penetration is shows unsymmetrical bowl shape. This deviation bead process is applied to the multi-pass welding in the narrow-gap butt joint, resulting in less welding defects.
社団法人溶接学会の論文
1979-08-05