Title:
GAS SHIELDED ARC WELDING METHOD, STRUCTURE OBJECT PRODUCTION METHOD, AND SHIELDING GAS
Document Type and Number:
WIPO Patent Application WO/2022/004032
Kind Code:
A1
Abstract:
Provided is a gas shielded arc welding method with which arc stability is high and incomplete fusion can be suppressed, regardless of the conditions of a welding material, a welding base material, and the like. Also provided are a structure object production method using the welding method, and a shielding gas to be used in the welding method. The shielding gas to be used in the gas shielded arc welding contains, with respect to the total volume of the shielding gas, between 0.5 % by volume and 2.0 % by volume inclusive of CO2, and between 0.5 % by volume and 3.0 % by volume inclusive of H2, the remainder being Ar and unavoidable impurities. When [CO2] represents the CO2 content in percentage by volume with respect to the total volume of the shielding gas, and [H2] represents the H2 content in percentage by volume with respect to the total volume of the shielding gas, the shielding gas satisfies formula (1) and formula (2). (1): 1.30 ≤ [CO2] + [H2] ≤ 4.40 (2): 0.35 ≤ [H2]/([CO2] + [H2]) ≤ 0.74
Inventors:
MUKAI NAOKI
ABE MAYUMI
SUZUKI MASAMICHI
KOZUKI TAKANORI
ABE MAYUMI
SUZUKI MASAMICHI
KOZUKI TAKANORI
Application Number:
PCT/JP2021/003997
Publication Date:
January 06, 2022
Filing Date:
February 03, 2021
Export Citation:
Assignee:
KOBE STEEL LTD (JP)
KAWASAKI HEAVY IND LTD (JP)
KAWASAKI HEAVY IND LTD (JP)
International Classes:
B23K9/173; B23K9/16; B23K35/30; B23K35/368
Foreign References:
| JP2005515899A | 2005-06-02 | |||
| JPS60130496A | 1985-07-11 | |||
| JP2007296535A | 2007-11-15 |
Attorney, Agent or Firm:
EIKOH PATENT FIRM, P.C. (JP)
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