Title:
GAS-SHIELDED ARC WELDING METHOD, WELDED JOINT, AND WELDED-JOINT PRODUCTION METHOD
Document Type and Number:
WIPO Patent Application WO/2022/196541
Kind Code:
A1
Abstract:
Provided are a gas-shielded arc welding method, a welded joint, and a production method therefor. According to the present invention, in gas-shielded arc welding for performing one-side butt welding on thick steel plates, a ceramic backing material is attached to a bottom surface of a groove, a welding current I is set to 200-450 A, a welding voltage V is set to 25-50 V, a welding heat input Q is controlled so as to fall within the range of expression 1 below, and one-pass first-layer welding is performed. Expression 1: 0.4×G-1≤Q≤0.6×G+1, where G shown in expression 1 denotes a root gap (mm).
Inventors:
ISHIGAMI ATSUSHI (JP)
TAKADA ATSUSHI (JP)
OKABE TAKATOSHI (JP)
TAKADA ATSUSHI (JP)
OKABE TAKATOSHI (JP)
Application Number:
PCT/JP2022/010756
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:
| JPH05293653A | 1993-11-09 | |||
| JP2007118068A | 2007-05-17 | |||
| JPH1029091A | 1998-02-03 | |||
| JPS5381453A | 1978-07-18 | |||
| JPS62118975A | 1987-05-30 | |||
| JP2000141031A | 2000-05-23 |
Attorney, Agent or Firm:
KUMASAKA Akira et al. (JP)
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