Ultrahigh-strength gas metal arc welded joint having excellent impact toughness, and solid wire for producing same
US10266929B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 24, 2013 |
| Grant date | Apr 23, 2019 |
| Priority date | — |
| Expiry date | Oct 20, 2034 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K9/173
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Provided is an ultrahigh-strength gas metal arc welded joint having a high degree of impact toughness. The ultrahigh-strength gas metal arc welded joint comprises, by wt %, carbon (C): 0.05% to 0.1%, silicon (Si): 0.2% to 0.7%, manganese (Mn): 1.5% to 2.5%, nickel (Ni): 2.0% to 3.5%, chromium (Cr): 0.3% to 0.9%, copper (Cu): 0.1% to 0.3%, molybdenum (Mo): 0.5% to 0.8%, titanium (Ti): 0.02% to 0.04%, boron (B): 0.002% to 0.005%, aluminum (Al): 0.001% to 0.03%, nitrogen (N): 0.002% to 0.007%, phosphorus (P): 0.03% or less, sulfur (S): 0.03% or less, oxygen (O): 0.02% to 0.05%, and a balance of iron (Fe) and other inevitable impurities, satisfying 0.4≤Ti/O≤1.2., 2.8≤Ti/N≤9.0, 10≤(2Ti+5B)/N≤20, and 3.5≤Mn+2Cr+3Mo+3Cu≤7.5.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.