深溶込みサブマージアーク溶接ビードに発生する欠陥とその防止策

概要

論文の詳細を見る
The correlation between occurrence of weld defects and welding parameters in high-current submerged-arc welding was studied over the range of 500 to 2000amp, 25 to 50 volt and 25 to 250cm/min, and a deep penetration multi-electrode submerged-arc welding process was developed. Main results obtained were as follows; (1) Solidification cracks, undercutting and overlapping were apt to occur in the weld bead made by the buried arc at high-current and low-voltage. (2) To prevent such cracks and undercutting it was effective to improve the solidification mode of weld metal by using a multi-electrode submerged-arc system suitably spacing the electrodes. (3) To prevent such overlapping it was necessary to select adequate groove geometry. (4) The multi-electrode submerged-arc welding process, which was characterized by the buried leading arc and the trailing arc operating as hot-top was able to provide a sound weld bead with deep penetration.
社団法人溶接学会の論文
1981-12-05