Electric heating – Metal heating – By arc
Patent
1975-01-29
1977-04-19
Reynolds, Bruce A.
Electric heating
Metal heating
By arc
219 75, B23K 902
Patent
active
040190188
ABSTRACT:
The narrow gap butt welding of aluminum and aluminum alloy plates of a thickness more than 20 mm with a non-consumable electrode is conducted by inserting a filling material into a welding groove, applying a direct current of more than 300 A between said non-consumable electrode which does not have a sharp end and said plates to be welded with straight polarity, maintaining an arc length from 0.5 to 5 mm and shielding the welding groove area with a shielding gas comprising at least 50% helium.
REFERENCES:
patent: 3374335 (1968-03-01), Reesor et al.
patent: 3549857 (1970-12-01), Needham et al.
patent: 3692973 (1972-09-01), Oku et al.
patent: 3825712 (1974-07-01), Gibbs
D. D. Rager, "Direct Current, Straight Polarity Gas Tungsten-Arc Welding of Aluminum," Welding Journal, 5/1971, pp. 332-341.
Endo Toshihiko
Oishi Minoru
Okuda Naoki
Rokujo Masaharu
Tomita Makoto
(Kobe Steel, Ltd.)
Reynolds Bruce A.
Shaw Clifford C.
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