Title:
GAS SHIELD ARC WELDING METHOD, WELDING JOINT, AND METHOD FOR PRODUCING WELDING JOINT
Document Type and Number:
WIPO Patent Application WO/2022/196540
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a gas shield arc welding method, a welding joint, and a method for producing the welding joint. The present invention pertains to a gas shield arc welding method for joining steel materials by narrow-groove multi-layer welding, wherein: the groove of the steel materials is set to a groove angle θ of not more than 20°; the root gap G (mm) is set to 7-15 mm at a lower portion of the groove; and, when initial layer welding is to be performed, a backing material made of ceramic is used, the welding current I (A) is set to 250-400 A and the welding voltage V (V) is set to 25-45 V, and a single pass is conducted by performing control so that the value [Q/G] obtained by dividing, by the root gap G (mm), a welding heat input Q (kj/mm) calculated by a prescribed expression falls within a range of 0.32-0.70.
Inventors:
TAKADA ATSUSHI (JP)
ITO TAKAHITO (JP)
FUJISAWA SEIJI (JP)
ISHIGAMI ATSUSHI (JP)
ITO TAKAHITO (JP)
FUJISAWA SEIJI (JP)
ISHIGAMI ATSUSHI (JP)
Application Number:
PCT/JP2022/010755
Publication Date:
September 22, 2022
Filing Date:
March 11, 2022
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
B23K37/06; B23K9/16
Foreign References:
| JPS5111033A | 1976-01-28 | |||
| JPH05293653A | 1993-11-09 | |||
| JP5861785B2 | 2016-02-16 | |||
| JP6568622B1 | 2019-08-28 |
Attorney, Agent or Firm:
KUMASAKA Akira et al. (JP)
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