US4437906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flux composition for electro-slag over-lay welding of a cylindrical vessel with a strip electrode
Assignee: JFE Steel Corp
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Filing: 1983-03-14
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Granted: 1984-03-20
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Expires: 2003-03-14
Abstract
Abstract A flux composition suitable for electro-slag over-lay welding a stainless steel on a circumferential inner surface of a cylindrical vessel with a strip electrode under controlling a flow of molten slag and metal with an outer electro-magnetic field, which contains 50-60% by weight of CaF 2 , 10-20% by weight of SiO 2 , 5-25% by weight of CaO and 10-30% by weight of Al 2 O 3 in a ratio of SiO 2 /CaF 2 of at least 0.20 and a ratio of CaO/SiO 2 of at least 0.50.
Inventors
- 👤 Junji Tateishi
- 👤 Takeharu Ishikawa
- 👤 Shozaburo Nakano
- 👤 Noboru Nishiyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:49
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/36; B23K35/3601; B23K35/3603; B23K35/3605
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
90 words
A flux composition for horizontal electro-slag over-lay welding a stainless steel on a circumferential inner surface of a cylindrical vessel with a strip electrode under controlling a flow of molten slag and metal with an outer electro-magnetic field, which contains 50-60% by weight of CaF 2 , 10-20% by weight of SiO 2 , 5-25% by weight of CaO and 10-30% by weight of Al 2 O 3 in a ratio of SiO 2 /CaF 2 of at least 0.20 and a ratio of CaO/SiO 2 of at least 0.50.
Claim 2
Dependent Claim
90 words
A flux composition for horizontal electro-slag over-lay welding a stainless steel on a circumferential inner surface of a cylindrical vessel with a strip electrode under controlling a flow of molten slag and metal with an outer electro-magnetic field, which contains 50-60% by weight of CaF 2 , 10-20% by weight of SiO 2 , 5-25% by weight of CaO and 10-30% by weight of Al 2 O 3 in a ratio of SiO 2 /CaF 2 of at least 0.20 and a ratio of CaO/SiO 2 of at least 0.50.
Claim 3
Dependent Claim
46 words
The flux composition as claimed in claim 1, wherein at least one of manganese oxide and chromium oxide is added in an amount of each component being less than 10% by weight and in a total amount of both components being less than 15% by weight.
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) | 1987-03-20 | 1987-09-19 | 1988-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-20 | 1991-09-19 | 1992-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-20 | 1995-09-19 | 1996-03-20 | $7700.00 | Window Closed / Lapsed |