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US4017339A
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Flux for use in submerged arc welding of steel
Assignee: Kobe Steel Ltd
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Filing: 1974-11-29
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Granted: 1977-04-12
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Expires: 1994-11-29
Abstract
Abstract A flux for use in submerged arc welding of steel, is formed from 10 - 70% iron powder, 10 - 50% MgO, 3 - 25% CaO, 2 - 25% carbonate based on the CO 2 content, 0.03 - 1.5% of a compound or mixture containing boron oxide, the weight being based on the B 2 O 3 content, less than 15% TiO 2 , and at least one deoxidizing metallic agent selected from the group consisting of Si, Mn, Al, Ti and alloys thereof.
Inventors
- 👤 Naoki Okuda
- 👤 Kazuo Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:08
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/36; B23K35/362; B23K35/3601; B23K35/3602
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
94 words
A flux composition which is useful in submerged arc welding of steel, which comprises: 10 - 70% iron powder, 10 - 50% MgO, 3 - 25% CaO, 2 - 25% CO 2 as derived from a carbonate compound, 0.03 - 1.5% B 2 O 3 as derived from B 2 O 3 itself, a boron compound from which B 2 O 3 can be derived or mixtures thereof, less than 15% TiO 2 , and at least one deoxidizing metallic agent selected from the group consisting of Si, Mn, Al, Ti and alloys thereof.
Claim 2
Dependent Claim
94 words
A flux composition which is useful in submerged arc welding of steel, which comprises: 10 - 70% iron powder, 10 - 50% MgO, 3 - 25% CaO, 2 - 25% CO 2 as derived from a carbonate compound, 0.03 - 1.5% B 2 O 3 as derived from B 2 O 3 itself, a boron compound from which B 2 O 3 can be derived or mixtures thereof, less than 15% TiO 2 , and at least one deoxidizing metallic agent selected from the group consisting of Si, Mn, Al, Ti and alloys thereof.
Claim 3
Dependent Claim
53 words
The flux composition of claim 1, which additionally contains Si in an amount of 1.2 - 5.0% in the form of Fe--Si or Si--Mn, Mn in an amount of 1.0 - 6.0% in the form of Fe--Mn, metallic manganese or Si--Mn, and Ti and Al in an amount of up to 4.5% total.
Claim 4
Dependent Claim
23 words
The flux composition of claim 1, wherein the boron oxide is present in the form of borosilicate, borosilicon glass or borosilicate mineral anhydride.
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) | 1980-04-11 | 1980-10-11 | 1981-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-11 | 1984-10-11 | 1985-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-11 | 1988-10-11 | 1989-04-12 | $7700.00 | Window Closed / Lapsed |