Kobe Steel, Ltd.

Minoru Oishi

Naoki Okuda

Makoto Tomita

Yasuhiro Nagai

Katsuro Iio

Keiichiro Hirakoso

Hisaaki Yokota

Toshihiko Endo

Toshisada Kashimura

Syozi Koga

Nobumasa Ohkubo

Kazuo Kogane

Kazuo Yonezawa

Tetsurou Nariai

Masaharu Rokujo

The present invention relates to a method of vertically upward arc welding for vertical and inclined joints. More particularly, the invention relates to a vertically upward arc welding method which includes the step of feeding a strip electrode in a direction at which the plane including the width direction of the strip electrode crosses the weld line, generating an arc from the strip electrode to a molten pool and/or an upper base metal disposed above the surface of the molten pool, melting the upper base metal disposed above a sliding backing shoe on the front surface side of the groove, and performing welding by expanding the groove and simultaneously dropping the molten metal onto the lower molten pool and depositing the same therein.

Vertical welding method

Aluminum and aluminum alloys are welded in a horizontal welding position in which the base metals to be welded are vertically disposed in abutting relationship with the welding groove opened sidewise by oscillating the tip of the welding electrode in the widthwise direction of the abutted base metals and welding the base metals while maintaining the angle formed by the surface of the molten pool and the electrode on the advancing side thereof greater than 90.degree.. The surface of the molten pool as used herein is defined as one which is parallel to the crater surface of the weld which results upon termination of welding by extinction of the welding arc.

Process for welding aluminum and aluminum alloys in horizontal welding

A method of vertical welding of aluminum and aluminum alloys comprising welding Al or an Al alloy while oscillating in a welding groove an electrode in a closed pattern corresponding substantially to the groove shape, wherein the welding is conducted by using a welding current higher by 10 to 150 A than the base welding current at least during the course of oscillation of the electrode along the groove face of one of the materials to be welded while the electrode is pursuing courses of oscillation along both groove faces of the materials to be welded.

Method of vertical welding of aluminum and aluminum alloys

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.

Process for narrow gap welding of aluminum alloy thick plates

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Fujisawa, Japan

Minoru Oishi