Title:
MULTI-ELECTRODE SUBMERGED ARC WELDING METHOD AND WELDING APPARATUS
Document Type and Number:
WIPO Patent Application WO/2018/235701
Kind Code:
A1
Abstract:
Provided is a fillet welding multi-electrode submerged arc welding method and welding apparatus, wherein a leading electrode 4 has a reverse polarity, the torch angle θL of the leading electrode 4 satisfies 5°≤θL≤45°, the torch angle θT of a tailing electrode 5 satisfies 40°≤θT≤60° and θL≤θT, and the current density JL [A/mm2] and the arc voltage VL {V] of the leading electrode 4 satisfy 5.0≤JL/VL≤18.5. As a result, even when the thickness of a base material plate is large, pore defects can be reduced by obtaining a sufficient deep weld penetration effect, and high-speed welding can be carried out while maintaining an optimum bead shape by stabilizing a molten metal.
Inventors:
YAMASAKI RYOTA
MUKAI NAOKI
SUZUKI REIICHI
MUKAI NAOKI
SUZUKI REIICHI
Application Number:
PCT/JP2018/022641
Publication Date:
December 27, 2018
Filing Date:
June 13, 2018
Export Citation:
Assignee:
KOBE STEEL LTD (JP)
International Classes:
B23K9/18; B23K9/02
Foreign References:
| JPS4638003B1 | ||||
| JP2014050854A | 2014-03-20 | |||
| JPS5373448A | 1978-06-29 | |||
| JPH02280968A | 1990-11-16 | |||
| JPS4026167B1 |
Attorney, Agent or Firm:
EIKOH PATENT FIRM, P.C. (JP)
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