Gas-shielded arc welding method and method for manufacturing welded structure
US12134153B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jun 19, 2017 |
| Grant date | Nov 5, 2024 |
| Priority date | — |
| Expiry date | Apr 12, 2040 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C38/00
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A gas-shielded arc welding method includes welding a steel plate having a tensile strength of 780 MPa or more while feeding a consumable electrode via a welding torch and flowing a shielding gas. The consumable electrode includes, in mass %, C: 0 to 0.20%, Si: 0 to 0.50%, Mn: 0 to 0.50%, Cr: 1.00% to 9.00%, S: 0.0020% to 0.0600%, and Ni: 0 to 0.50%. The shielding gas includes, in vol. %, at least one of CO2 and O2: 1% to 15% in total, with the remainder being Ar and unavoidable impurities. Welding is performed under the condition satisfying the relationship of 1≤{−0.05×[CO2+O2]}+[Cr]≤8.3, and [Cr] represents the content of Cr in the consumable electrode, and [CO2+O2] represents a total content of at least one of CO2 and O2 in the shielding gas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.