被覆アーク溶接棒の溶滴移行性について(第4報)
充填心線被覆アーク溶接棒について
1966 年 35 巻 12 号 p. 1208-1215
詳細
1966 年 35 巻 12 号 p. 1208-1215
The authors studied on the various welding characteristics and droplet transferring phenomena of the newly developed flux-cored covered electrode, whose core wire contained a flux of 4 weight percent chiefly composed of carbonates. The results obtained are as follows:
1. The bare flux-cored wire gives greater specific melting rate as compared with ordinary solid wire, and this merit is retained when it is covered with outer flux.
2. The new electrode gives, independently of the coating type, a greater melting rate and a smaller transferring droplet.
3. The feature of the new electrodes was proved to originate from the inner cored flux, because it is not seen in the ordinary electrode whose outer flux is the same as the sum of the outer and inner flux of the new electrode in its component and total quantity.
4. The new electrode gives more stable and less divergent arc, less spatter and accordingly fine and beautiful bead appearence.
5. The new method of high-speed cine-photography clarified the phenomena inside the electrode sheath. It is considered that finer droplet from the new electrode depends not only upon the mechanical action of the evolving gas from inner flux, but also upon its characteristic arc which separates the droplet sticking to the core wire tip in an earlier stage than in the ordinary electrode.
