US4566916A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low-hydrogen, low-nitrogen, low-oxygen welding flux
Assignee: Nippon Steel Corp
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Filing: 1984-12-06
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Granted: 1986-01-28
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Expires: 2004-12-06
Abstract
Abstract A welding flux which forms a weld metal simultaneously satisfying low-oxygen, low-nitrogen, and low-hydrogen contents, gives weld beads in good form, and joins given metal pieces without entailing weld defects is obtained by formulating the flux in a composition such that a four-component system used therein is formed of CaO, MgO, Al2O3, and SiO2 in the following proportions based on the total amount of the system taken as unity (100%), CaO: 10 to 60% MgO: Not more than 30% Al2O3: 20 to 70% SiO2: 5 to 40% that the total amount of the four components accounts for not less than 35% of the total weight of the flux less the CO2 component thereof, that the composition incorporates therein CaF2 in an amount of from 25 to 65% of the total weight of the flux less the CO2 component thereof, and that the composition fulfills a specific set of other requirements, concerning a fused substance and a non-fused substance, as selected to suit the particular application in which the flux is to be used.
Inventors
- 👤 Kyoichi Nagano
- 👤 Hiroshi Naganuma
- 👤 Koichi Shinada
- 👤 Motonori Tamura
- 👤 Shigenobu Soneda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:15
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/36; B23K35/3601; B23K35/361; B23K35/3603
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
188 words
A welding flux suitable for submerged arc welding, which comprises CaO, MgO, Al 2 O 3 and SiO 2 , wherein the proportions of the above four components to the total amount thereof taken as 100% fall in the following respective ranges: CaO: 10 to 60% MgO: Not more than 30% Al 2 O 3 : 20 to 70% SiO 2 : 5 to 40% and wherein the total amount of said four components accounts for not less than 35% of the total weight of said flux less any CO 2 component thereof, said flux further contains CaF 2 in an amount of from 25 to 60% of the total weight of said flux less the CO 2 component thereof, the basicity (B) of said flux is not less than 1.0 calculated in accordance with the formula (I) ##EQU4## wherein N denotes the mol percentage of the respective components, said flux contains both a fused substance and a non-fused substance, said fused substance has undergone a water-cooling treatment, and the basicity (B) of said fused substance calculated in accordance with the formula (I) is not more than 2.7.
Claim 2
Dependent Claim
188 words
A welding flux suitable for submerged arc welding, which comprises CaO, MgO, Al 2 O 3 and SiO 2 , wherein the proportions of the above four components to the total amount thereof taken as 100% fall in the following respective ranges: CaO: 10 to 60% MgO: Not more than 30% Al 2 O 3 : 20 to 70% SiO 2 : 5 to 40% and wherein the total amount of said four components accounts for not less than 35% of the total weight of said flux less any CO 2 component thereof, said flux further contains CaF 2 in an amount of from 25 to 60% of the total weight of said flux less the CO 2 component thereof, the basicity (B) of said flux is not less than 1.0 calculated in accordance with the formula (I) ##EQU4## wherein N denotes the mol percentage of the respective components, said flux contains both a fused substance and a non-fused substance, said fused substance has undergone a water-cooling treatment, and the basicity (B) of said fused substance calculated in accordance with the formula (I) is not more than 2.7.
Claim 3
Dependent Claim
188 words
A welding flux suitable for submerged arc welding, which comprises CaO, MgO, Al 2 O 3 and SiO 2 , wherein the proportions of the above four components to the total amount thereof taken as 100% all in the following respective ranges: CaO: 10 to 60% MgO: Not more than 30% Al 2 O 3 : 20 to 70% SiO 2 : 5 to 40% and wherein the total amount of said four components accounts for not less than 35% of the total weight of said flux less any CO 2 component thereof, said flux further contains CaF 2 in an amount of from 25 to 65% of the total weight of said flux less the CO 2 component thereof, the basicity (B) of said flux is not less than 1.0 calculated in accordance with the formula (I) ##EQU5## wherein N denotes the mol percentage of the respective components, said flux contains both a fused substance and a non-fused substance, said fused substance has undergone an air-cooling treatment, and the basicity (B) of said fused substance calculated in accordance with the formula (I) is not more than 3.0.
Claim 4
Dependent Claim
188 words
A welding flux suitable for submerged arc welding, which comprises CaO, MgO, Al 2 O 3 and SiO 2 , wherein the proportions of the above four components to the total amount thereof taken as 100% all in the following respective ranges: CaO: 10 to 60% MgO: Not more than 30% Al 2 O 3 : 20 to 70% SiO 2 : 5 to 40% and wherein the total amount of said four components accounts for not less than 35% of the total weight of said flux less any CO 2 component thereof, said flux further contains CaF 2 in an amount of from 25 to 65% of the total weight of said flux less the CO 2 component thereof, the basicity (B) of said flux is not less than 1.0 calculated in accordance with the formula (I) ##EQU5## wherein N denotes the mol percentage of the respective components, said flux contains both a fused substance and a non-fused substance, said fused substance has undergone an air-cooling treatment, and the basicity (B) of said fused substance calculated in accordance with the formula (I) is not more than 3.0.
Claim 5
Dependent Claim
240 words
A welding flux suitable for submerged arc welding, which comprises CaO, MgO, Al 2 O 3 and SiO 2 , wherein the proportions of the above four components to the total amount thereof taken as 100% fall in the following respective ranges: CaO: 10 to 60% MgO: Not more than 30% Al 2 O 3 : 20 to 70% SiO 2 : 5 to 40% and wherein the total amount of said four components accounts for not less than 35% of the total weight of said flux less any CO 2 component thereof, said flux further contains CaF 2 in an amount of from 15 to 60% of the total weight of said flux less the CO 2 component thereof, the basicity (B) of said flux is not less than 1.0 calculated in accordance with the formula (I) ##EQU6## wherein N denotes the mol percentage of the respective components, said flux contains both a fused substance and a non-fused substance, said fused substance has undergone a water-cooling treatment, the basicity (B) of said fused substance calculated in accordance with the formula (I) is not more than 2.7, and said non-fused substance contains a carbonate mineral or carbonate minerals in an amount such that the CO 2 constituting said carbonate mineral or minerals, as reduced to CO 2 gas, accounts for a proportion of from 0.2 to 5.0% of the total weight of said flux less the CO 2 component thereof.
Claim 6
Dependent Claim
240 words
A welding flux suitable for submerged arc welding, which comprises CaO, MgO, Al 2 O 3 and SiO 2 , wherein the proportions of the above four components to the total amount thereof taken as 100% fall in the following respective ranges: CaO: 10 to 60% MgO: Not more than 30% Al 2 O 3 : 20 to 70% SiO 2 : 5 to 40% and wherein the total amount of said four components accounts for not less than 35% of the total weight of said flux less any CO 2 component thereof, said flux further contains CaF 2 in an amount of from 15 to 60% of the total weight of said flux less the CO 2 component thereof, the basicity (B) of said flux is not less than 1.0 calculated in accordance with the formula (I) ##EQU6## wherein N denotes the mol percentage of the respective components, said flux contains both a fused substance and a non-fused substance, said fused substance has undergone a water-cooling treatment, the basicity (B) of said fused substance calculated in accordance with the formula (I) is not more than 2.7, and said non-fused substance contains a carbonate mineral or carbonate minerals in an amount such that the CO 2 constituting said carbonate mineral or minerals, as reduced to CO 2 gas, accounts for a proportion of from 0.2 to 5.0% of the total weight of said flux less the CO 2 component thereof.
Claim 7
Dependent Claim
240 words
A welding flux suitable for submerged arc welding, which comprises CaO, MgO, Al 2 O 3 and SiO 2 , wherein the proportions of the above four components to the total amount thereof taken as 100% fall in the following respective ranges: CaO: 10 to 60% MgO: Not more than 30% Al 2 O 3 : 20 to 70% SiO 2 : 5 to 40% and wherein the total amount of said four components accounts for not less than 35% of the total weight of said flux less any CO 2 component thereof, said flux further contains CaF 2 in an amount of from 15 to 65% of the total weight of said flux less the CO 2 component thereof, the basicity (B) of said flux is not less than 1.0 calculated in accordance with the formula (I) ##EQU7## wherein N denotes the mol percentage of the respective components, said flux contains both a fused substance and a non-fused substance, said fused substance has undergone an air-cooling treatment, the basicity (B) of said fused substance calculated in accordance with the formula (I) is not more than 3.0, and said non-fused substance contains a carbonate mineral or carbonate minerals in an amount such that the CO 2 constituting said carbonate mineral or minerals, as reduced to CO 2 gas, accounts for a proportion of from 0.2 to 5.0% of the total weight of said flux less the CO 2 component thereof.
Claim 8
Dependent Claim
240 words
A welding flux suitable for submerged arc welding, which comprises CaO, MgO, Al 2 O 3 and SiO 2 , wherein the proportions of the above four components to the total amount thereof taken as 100% fall in the following respective ranges: CaO: 10 to 60% MgO: Not more than 30% Al 2 O 3 : 20 to 70% SiO 2 : 5 to 40% and wherein the total amount of said four components accounts for not less than 35% of the total weight of said flux less any CO 2 component thereof, said flux further contains CaF 2 in an amount of from 15 to 65% of the total weight of said flux less the CO 2 component thereof, the basicity (B) of said flux is not less than 1.0 calculated in accordance with the formula (I) ##EQU7## wherein N denotes the mol percentage of the respective components, said flux contains both a fused substance and a non-fused substance, said fused substance has undergone an air-cooling treatment, the basicity (B) of said fused substance calculated in accordance with the formula (I) is not more than 3.0, and said non-fused substance contains a carbonate mineral or carbonate minerals in an amount such that the CO 2 constituting said carbonate mineral or minerals, as reduced to CO 2 gas, accounts for a proportion of from 0.2 to 5.0% of the total weight of said flux less the CO 2 component thereof.
Claim 9
Dependent Claim
222 words
A welding flux suitable for submerged arc welding, which comprises CaO, MgO, Al 2 O 3 and SiO 2 , wherein the proportions of the above four components to the total amount thereof taken as 100% fall in the following respective ranges: CaO: 10 to 60% MgO: Not more than 30% Al 2 O 3 : 20 to 70% SiO 2 : 5 to 40% and wherein the total amount of said four components accounts for not less than 35% of the total weight of said flux less any CO 2 component thereof, said flux further contains CaF 2 in an amount of from 15 to 65% of the total weight of said flux less the CO 2 component thereof, the basicity (B) of said flux is not less than 1.0 calculated in accordance with the formula (I) ##EQU8## wherein N denotes the mol percentage of the respective components, said flux contains both a fused substance and a non-fused substance, said fused substance has undergone a quick air-cooling treatment, and said non-fused substance contains a carbonate mineral or carbonate minerals in an amount such that the CO 2 constituting said carbonate mineral or minerals, as reduced to CO 2 gas, accounts for a proportion of from 0.2 to 5.0% of the total weight of said flux less the CO 2 component thereof.
Claim 10
Dependent Claim
222 words
A welding flux suitable for submerged arc welding, which comprises CaO, MgO, Al 2 O 3 and SiO 2 , wherein the proportions of the above four components to the total amount thereof taken as 100% fall in the following respective ranges: CaO: 10 to 60% MgO: Not more than 30% Al 2 O 3 : 20 to 70% SiO 2 : 5 to 40% and wherein the total amount of said four components accounts for not less than 35% of the total weight of said flux less any CO 2 component thereof, said flux further contains CaF 2 in an amount of from 15 to 65% of the total weight of said flux less the CO 2 component thereof, the basicity (B) of said flux is not less than 1.0 calculated in accordance with the formula (I) ##EQU8## wherein N denotes the mol percentage of the respective components, said flux contains both a fused substance and a non-fused substance, said fused substance has undergone a quick air-cooling treatment, and said non-fused substance contains a carbonate mineral or carbonate minerals in an amount such that the CO 2 constituting said carbonate mineral or minerals, as reduced to CO 2 gas, accounts for a proportion of from 0.2 to 5.0% of the total weight of said flux less the CO 2 component thereof.
Claim 11
Dependent Claim
235 words
A welding flux suitable for submerged arc welding, which comprises CaO, MgO, Al 2 O 3 and SiO 2 , wherein the proportions of the above four components to the total amount thereof taken as 100% fall in the following respective ranges: CaO: 10 to 60% MgO: Not more than 30% Al 2 O 3 : 20 to 70% SiO 2 : 5 to 40% and wherein the total amount of said four components accounts for not less than 35% of the total weight of said flux less any CO 2 component thereof, said flux further contains CaF 2 in an amount of from 25 to 65% of the total weight of said flux less the CO 2 component thereof, the basicity (B) of said flux is not less than 1.0 calculated in accordance with the formula (I) ##EQU9## wherein N denotes the mol percentage of the respective components, said flux contains both a fused substance and a non-fused substance, said fused substance has undergone an air-cooling treatment, said fused substance contains CaF 2 in an amount of not less than 25% and said non-fused substance contains a carbonate mineral or carbonate minerals in an amount such that the CO 2 constituting said carbonate mineral or minerals, as reduced to CO 2 gas, accounts for a proportion of from 0.2 to 5.0% of the total weight of said flux less the CO 2 component thereof.
Claim 12
Dependent Claim
235 words
A welding flux suitable for submerged arc welding, which comprises CaO, MgO, Al 2 O 3 and SiO 2 , wherein the proportions of the above four components to the total amount thereof taken as 100% fall in the following respective ranges: CaO: 10 to 60% MgO: Not more than 30% Al 2 O 3 : 20 to 70% SiO 2 : 5 to 40% and wherein the total amount of said four components accounts for not less than 35% of the total weight of said flux less any CO 2 component thereof, said flux further contains CaF 2 in an amount of from 25 to 65% of the total weight of said flux less the CO 2 component thereof, the basicity (B) of said flux is not less than 1.0 calculated in accordance with the formula (I) ##EQU9## wherein N denotes the mol percentage of the respective components, said flux contains both a fused substance and a non-fused substance, said fused substance has undergone an air-cooling treatment, said fused substance contains CaF 2 in an amount of not less than 25% and said non-fused substance contains a carbonate mineral or carbonate minerals in an amount such that the CO 2 constituting said carbonate mineral or minerals, as reduced to CO 2 gas, accounts for a proportion of from 0.2 to 5.0% of the total weight of said flux less the CO 2 component thereof.
Claim 13
Dependent Claim
220 words
A welding flux suitable for submerged arc welding, which comprises CaO, MgO, Al 2 O 3 and SiO 2 , wherein the proportions of the above four components to the total amount thereof taken as 100% fall in the following respective ranges: CaO: 10 to 60% MgO: Not more than 30% Al 2 O 3 : 20 to 70% SiO 2 : 5 to 40% and wherein the total amount of said four components accounts for not less than 35% of the toal weight of said flux less any CO 2 components thereof, said flux further contains CaF 2 in an amount of from 25 to 65% of the total weight of said flux less the CO 2 component thereof, the basicity (B) of said flux is not less than 1.0 calculated in accordance with formula (I) ##EQU10## wherein N denotes the mol percentage of the respective components, said flux contains both a fused substance and a non-fused substance, said fused substance has undergone a quick air-cooling treatment, and said non-fused substance contains a carbonate mineral or carbonate minerals in an amount such that the CO 2 constituting said carbonate mineral or minerals, as reduced to CO 2 gas, accounts for a proportion of from 0.2 to 5.0% of the total weight of said flux less the CO 2 thereof.
Claim 14
Dependent Claim
220 words
A welding flux suitable for submerged arc welding, which comprises CaO, MgO, Al 2 O 3 and SiO 2 , wherein the proportions of the above four components to the total amount thereof taken as 100% fall in the following respective ranges: CaO: 10 to 60% MgO: Not more than 30% Al 2 O 3 : 20 to 70% SiO 2 : 5 to 40% and wherein the total amount of said four components accounts for not less than 35% of the toal weight of said flux less any CO 2 components thereof, said flux further contains CaF 2 in an amount of from 25 to 65% of the total weight of said flux less the CO 2 component thereof, the basicity (B) of said flux is not less than 1.0 calculated in accordance with formula (I) ##EQU10## wherein N denotes the mol percentage of the respective components, said flux contains both a fused substance and a non-fused substance, said fused substance has undergone a quick air-cooling treatment, and said non-fused substance contains a carbonate mineral or carbonate minerals in an amount such that the CO 2 constituting said carbonate mineral or minerals, as reduced to CO 2 gas, accounts for a proportion of from 0.2 to 5.0% of the total weight of said flux less the CO 2 thereof.
Claim 15
Dependent Claim
237 words
A welding flux suitable for submerged arc welding, which comprises CaO, MgO, Al 2 O 3 and SiO 2 , wherein the proportions of the above four components to the total amount thereof taken as 100% fall in the following respective ranges: CaO: 10 to 60% MgO: Not more than 30% Al 2 O 3 : 20 to 70% SiO 2 : 5 to 40% and wherein the total amount of the above four components accounts for not less than 35% of the total weight of said flux less any CO 2 component thereof, said flux further contains CaF 2 in an amount of from 25 to 65% of the total weight of said flux less the CO 2 component thereof, the basicity (B) of said flux is not less than 1.0 calculated in accordance with the formula (I) ##EQU11## wherein N denotes the mol percentage of the respective components, said flux contains both a fused substance and a non-fused substance, said fused substance has undergone a quick air-cooling treatment, said fused substance contains CaF 2 in an amount of not less than 25%, and said non-fused substance contains a carbonate mineral of carbonate minerals in an amount such that the CO 2 constituting said carbonate mineral or minerals, as reduced to CO 2 gas, accounts for a proportion of from 0.2 to 5.0% of the total weight of said flux less the CO 2 component thereof.
Claim 16
Dependent Claim
237 words
A welding flux suitable for submerged arc welding, which comprises CaO, MgO, Al 2 O 3 and SiO 2 , wherein the proportions of the above four components to the total amount thereof taken as 100% fall in the following respective ranges: CaO: 10 to 60% MgO: Not more than 30% Al 2 O 3 : 20 to 70% SiO 2 : 5 to 40% and wherein the total amount of the above four components accounts for not less than 35% of the total weight of said flux less any CO 2 component thereof, said flux further contains CaF 2 in an amount of from 25 to 65% of the total weight of said flux less the CO 2 component thereof, the basicity (B) of said flux is not less than 1.0 calculated in accordance with the formula (I) ##EQU11## wherein N denotes the mol percentage of the respective components, said flux contains both a fused substance and a non-fused substance, said fused substance has undergone a quick air-cooling treatment, said fused substance contains CaF 2 in an amount of not less than 25%, and said non-fused substance contains a carbonate mineral of carbonate minerals in an amount such that the CO 2 constituting said carbonate mineral or minerals, as reduced to CO 2 gas, accounts for a proportion of from 0.2 to 5.0% of the total weight of said flux less the CO 2 component thereof.
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) | 1989-01-27 | 1989-07-29 | 1990-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-27 | 1993-07-29 | 1994-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-27 | 1997-07-29 | 1998-01-28 | $7700.00 | Window Closed / Lapsed |