CO_2 溶接継手の疲れ強さ

概要

論文の詳細を見る
Althouth it is well-known that the weld metal by CO_2 welding has better toughness and static mechanical properties than those by coated electrode manual arc welding, CO_2 welding gives more rough and irregular bead shape in comparison with other welding processes using flux. Therefore, it is not clear, whether CO_2 welded joint with higher toughness and ductility may give the higher fatigue strength than coated electrode welded joint, because fatigue strength of welded joint is strongly influenced by geometry at the toe of bead. This study was carried out to compare fatigue strength of full- and semi-automatic CO_2 welded joint with that of coated electrode manual arc welded joint of previous report. The obtained results were as follows; 1) Fatigue strength by full- and semi-automatic CO_2 welded joint was almost the same level. 2) Full- and semi-automatic welded joint had a little lower fatigue strength than that of coated electrode welded joint; This was attributed to the sharp toe geometry. 3) Fatigue design strength may be proposed as 14kg/(mm)^2 for CO_2 flat positoned full-and semi-automatic, and vertical positioned semi-automatic welded joints.
社団法人溶接学会の論文
1976-10-05