TWO ELECTRODE SUBMERGED ARC WELDING METHOD FOR BOX COLUMN CORNER JOINT

PROBLEM TO BE SOLVED: To provide a submerged arc welding method which is free from incomplete penetration in the welding of a box column corner joint and which is capable of a weld zone superior in crack resistance at high temperature. SOLUTION: In welding a Y-shaped groove having an angle of 40 deg...

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Hauptverfasser:	YAMAGUCHI MASAMI, MOTOMATSU RYUICHI, MATSUTANI NAOAKI
Format:	Patent
Sprache:	eng
Schlagworte:	CLADDING OR PLATING BY SOLDERING OR WELDING CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR PERFORMING OPERATIONS SOLDERING OR UNSOLDERING TRANSPORTING WELDING WORKING BY LASER BEAM
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a submerged arc welding method which is free from incomplete penetration in the welding of a box column corner joint and which is capable of a weld zone superior in crack resistance at high temperature. SOLUTION: In welding a Y-shaped groove having an angle of 40 deg. or less, sealing welding is performed preliminarily over the entire lines in the groove, making the ratio W/D of the groove width W (mm) on the surface of the sealing weld bead to the wire diameter D (mm) of a preceding electrode to be 0.4-1.5. In addition, the sealing welding is carried out by CO2 gas shielded arc welding using a flux cored wire or a solid wire. As a result, a sound weld zone can be obtained free from complete penetration and superior in crack resistance at high temperature, enabling a highly efficient manufacture of a box column.