放射性同位元素 S^<35> による研究(第 2 報) : 母材 S の熔着金属えの拡散について

概要

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By using the mother plates containing Radioactive Isotope S^<35> the authors investigated the phenomenon of diffusion of sulphur from the mother plates to the weld-metals under multi-pass electric arc-welding. As the result of this experiment it was revealed that; 1) The influence of sulphur of the parent plate extends clearly to the fifth pass of weld metals in the multi-pass welding. 2) Although the absolute mass of sulphur absorbed by slag from the weld metal increases with sulphur content of parent-metal, the "Desulphurization Ratio" decreases according to the increases of sulphur content of parent plates or weld metal on which the next welding pass may be run in multi-pass welding. 3) It was found by counting test that there is a slightly more sulphur in the heat-affected zone under the weld metal than the other parts of parent-plate, and it is guessed that this phenomenon will be caused by the thermal diffusion of sulphur which existed, at first, in the outside of the heat-affected zone.
社団法人溶接学会の論文
1953-08-01