Oxygen and Nitrogen Contents of three Welding Stage Metals by Submerged Arc Welding in Argon Atmosphere

概要

論文の詳細を見る
It is important to reveal the behavior of absorption and release of gases in the welding process in order to discuss gas contents in the weld metal. A submerged arc welding was carried out in the argon atmosphere. The welding process was divided into three stages : The wire tip metal stage, the metallic droplet stage, and the weld metal stage. The oxygen and nitrogen contents of wire tip metal became high by the effect of atmospheric gas partial pressure. Experimentally estimated values of oxygen and nitrogen of metallic droplets became smaller than those of wire tip metal, and oxygen content of weld metal was the smallest of all three stages, but the nitrogen content of weld metal was the highest of all three stages. The silicon and manganese reaction took place in molten metal at the wire tip, although it stayed at the wire tip for a very short time. Relatively little silicon and manganese reaction took place at the metallic droplet stage. However, reaction time of weld metal was the longest of all three stages, and deoxidation reaction took place efficiently.
社団法人溶接学会の論文
1988-10-01