被覆アーク溶接棒の溶滴移行性について(第 2 報) : 溶滴粒度におよぼす各種の要因

概要

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Applying the same method for evaluating the metal transferring characteristics of welding electrode as described in the first report, authors studied on the various factors influencing the metal droplet size from electrode, and the following results were obtained. (1) The size of droplet depends upon the welding current used, rod diameter and the coating thicknesses. It is considered that the existance of the protective sheath at the tip of electrode and its shape are the decisive factor. (2) The droplet size of high iron oxide type electrode is considerably affected by carbon content of core wire; the larger the amount of carbon the finer the droplet size. This is presumably due to growth of CO gas bubble in the droplet and its bursting out. (3) The so-called "Burning" phenomenon in the end part of an electrode may be understood as a transition of spray- to drop type metal transferring characteristics, which is proved by the measurement of droplet size. (4) The relation between the various items of socalled electrode workability and metal transferring characteristics were discussed; and it was shown that d 50,mean droplet size as defined in the 1st report, may be chosen as the most important independent variable for assesing workabillity.
社団法人溶接学会の論文
1963-03-25