Patent US4207121A successfully refreshed from Google Patents.
US4207121A
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High performance fused flux for submerged arc welding
Assignee: ESAB AB
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Filing: 1978-12-06
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Granted: 1980-06-10
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Expires: 1998-12-06
Abstract
Abstract A fused flux for use especially in submerged arc welding of high strength, low-alloy pipe steels, characterized in that the flux is amorphous and nonpowdery and capable of producing low oxygen content weld metal having a high impact strength even at low temperature, the flux containing: 20-60 wt. % CaO; 15-55 wt. % SiO2; 5-10 wt. % CaF2; 5-15 wt. % TiO2; 0-5 wt. % Al2O3; 3-15 wt. % Na3AlF6; and 5-30 wt. % MgO.
Inventors
- 👤 Masahiro Nakabayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:05
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/36; B23K35/362; B23K35/3601; B23K35/3602
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
89 words
A fused flux for submerged arc welding of high strength, low-alloy pipe steels, using AC, DC or multiple AC electrodes; characterized in that the flux is amorphous and non-powdery and capable of producing low oxygen content weld metal having a high impact strength even at low temperatures, the flux consisting essentially of: 20-60 wt. %: CaO 15-55 wt. %: SiO 2 5-10 wt. %: CaF 2 5-15 wt. %: TiO 2 0-5 wt. %: Al 2 O 3 3-15 wt. %: Na 3 AlF 6 5-30 wt. %: MgO
Claim 2
Dependent Claim
89 words
A fused flux for submerged arc welding of high strength, low-alloy pipe steels, using AC, DC or multiple AC electrodes; characterized in that the flux is amorphous and non-powdery and capable of producing low oxygen content weld metal having a high impact strength even at low temperatures, the flux consisting essentially of: 20-60 wt. %: CaO 15-55 wt. %: SiO 2 5-10 wt. %: CaF 2 5-15 wt. %: TiO 2 0-5 wt. %: Al 2 O 3 3-15 wt. %: Na 3 AlF 6 5-30 wt. %: MgO
Claim 3
Dependent Claim
38 words
A fused flux according to claim 1 consisting essentially of 34.0% CaO; 31.0% SiO 2 ; 7.5% CaF 2 ; 8.5% TiO 2 ; 2.0% Al 2 O 3 ; 10.0% Na 3 AlF 6 ; 7.0% MgO.
Claim 4
Dependent Claim
20 words
A fused flux according to claim 1 for use in combination with a welding wire electrode containing titanium and boron.
Claim 5
Dependent Claim
37 words
A fused flux according to claim 1 for use in combination with a welding wire electrode consisting essentially of 0.08 C; 1.37 Mn; 0.07 Si; 0.27 Mo; 0.03 Ti; and 0.005 B, the balance being predominantly iron.
Claim 6
Dependent Claim
33 words
A fused flux according to claim 1 for use in combination with a welding wire electrode consisting essentially of 0.10 C; 1.90 Mn; 0.70 Si; and 0.5 Mo, the balance being predominantly iron.
Claim 7
Dependent Claim
31 words
A fused flux according to claim 1 for use in combination with a welding wire electrode consisting essentially of 1.10 C; 1.6 Mn and 0.90 Si, the balance being predominantly iron.
Claim 8
Independent Claim
120 words
A method for submerged arc welding of high strength, low alloy pipe steels comprising depositing a fused flux consisting essentially of 20-60 wt. % CaO; 15-55 wt. % SiO 2 ; 5-10 wt. % CaF 2 ; 5-15 wt. % TiO 2 ; 0-5 wt. % Al 2 O 3 ; 3-15 wt. % Na 3 AlF 6 and 5-30 wt. % MgO upon the pipeline to be welded introducing a wire containing titanium and boron through the flux into contact with the pipeline to intitiate the submerged arc, supplying AC or DC power to the wire and then providing relative motion between the wire and pipeline to make a weld metal deposit having high impact properties at low temperatures.
Claim 9
Independent Claim
120 words
A method for submerged arc welding of high strength, low alloy pipe steels comprising depositing a fused flux consisting essentially of 20-60 wt. % CaO; 15-55 wt. % SiO 2 ; 5-10 wt. % CaF 2 ; 5-15 wt. % TiO 2 ; 0-5 wt. % Al 2 O 3 ; 3-15 wt. % Na 3 AlF 6 and 5-30 wt. % MgO upon the pipeline to be welded introducing a wire containing titanium and boron through the flux into contact with the pipeline to intitiate the submerged arc, supplying AC or DC power to the wire and then providing relative motion between the wire and pipeline to make a weld metal deposit having high impact properties at low temperatures.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-06-10 | 1983-12-10 | 1984-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-06-10 | 1987-12-10 | 1988-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-06-10 | 1991-12-10 | 1992-06-10 | $7700.00 | Window Closed / Lapsed |