Title:
MULTI-ELECTRODE GAS-SHIELDED SINGLE-SIDED ARC WELDING METHOD AND MULTI-ELECTRODE GAS-SHIELDED SINGLE-SIDED ARC WELDING DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/199815
Kind Code:
A1
Abstract:
Provided is a multi-electrode gas-shielded single-sided arc welding method which is capable of resulting in a preferable back bead shape and effectively preventing the occurrence of high-temperature cracking. This multi-electrode gas-shielded single-sided arc welding method involves filling a groove filler into a groove formed by a pair of plates butted together, and welding by using a plurality of electrodes arranged in a row in the weld line direction. The plurality of electrodes includes a preceding electrode and a succeeding electrode that is continuous with the preceding electrode. The polarity of the preceding electrode is DCEP, and the wire type of the preceding electrode is flux-cored wire or solid wire. The polarity of the succeeding electrode is DCEN, the wire type of the succeeding electrode is flux-cored wire, and the welding current of the succeeding electrode is 180A or greater. The inter-pole distance between the preceding electrode and the succeeding electrode is 65 mm to 100 mm, inclusive. The root gap of the groove is 3 mm to 8 mm, inclusive. The surface area of a portion occupied by the groove filler on a surface orthogonal to the weld line direction is 20 mm2 to 50 mm2, inclusive.
Inventors:
MIWA TSUYOSHI
YAMAZAKI KEI
KAKIZAKI TOMONORI
YAMAZAKI KEI
KAKIZAKI TOMONORI
Application Number:
PCT/JP2021/007387
Publication Date:
October 07, 2021
Filing Date:
February 26, 2021
Export Citation:
Assignee:
KOBE STEEL LTD (JP)
International Classes:
B23K9/173
Foreign References:
JPH09206945A | 1997-08-12 | |||
JP2019013980A | 2019-01-31 | |||
JP2000094128A | 2000-04-04 | |||
JPH11226736A | 1999-08-24 | |||
JP2015150571A | 2015-08-24 |
Attorney, Agent or Firm:
EIKOH PATENT FIRM, P.C. (JP)
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