被覆剤中の Mn 及び Si の脱酸効果に關する研究(第 2 報) : 被覆熔剤の組成と Mn 及び Si の関係

概要

論文の詳細を見る
Flux can be satisfactorily improved by including Mn and Si in it as deoxidizing agents. But the deoxidation effects differ according to the different compositions of the solvents used. On different kinds on flux, experiments have been conducted in this connection under the following conditions : 1) When the flux containing charcoal powder with C as its major component has been compared with one containing ilmenite and dextrin; 2) When only the solvent of CaO and Al_2O_3 is esed; and 3) When SiO_2 or MnO_2 is added to the above solvent. The following are the results ascertained by such experiments : When C on one hand and Mn and Si on the other co-exist, the amounts of C and Mn in the mild steel are welds go up and an avderse effect takes place; ilmenite and organic substanece (dextrine) give a favorable effect on deoxidation; and Mn and Si are effective deoxidation; and Mn and Si are effective deoxidizers even when the CaO-Al_2O_3 slag is basic. It has also been confirmed that, when SiO_2 and MnO_2 are added to the solvent containing deoxidation agent, there is a deteriorating trend in the quality of mild steel are welds as the amount of such addition increases above a certain limit.
社団法人溶接学会の論文