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US4408652A
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US
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Method of continuously casting nickel containing steel wherein surface cracks are prevented
Assignee: JFE Engineering Corp
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Filing: 1981-07-22
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Granted: 1983-10-11
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Expires: 2001-07-22
Abstract
Abstract An improved method of continuously casting nickel containing steel wherein the formation of surface cracks is prevented. The molten steel which is cast contains less than 0.0020% S, less than 0.0045% N, Ca in an amount of from 0.0020 to 0.0070%, Ni in an amount from 5.5 to 10%, the remainder being Fe and unavoidable impurities.
Inventors
- 👤 Chiaki Ouchi
- 👤 Tetsuya Sampei
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:32
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/08
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
68 words
An improved method of continuously casting nickel-containing steel wherein the formation of surface cracks is prevented comprising continuously casting molten nickel steel in the form of a continuous casting, the improvement wherein said molten nickel-containing steel comprises less than 0.0020% S, less than 0.0045% N, Ca in an amount from 0.0020 to 0.0070%, Ni in an amount from 5.5 to 10%, the remainder being Fe and unavoidable impurities.
Claim 2
Dependent Claim
68 words
An improved method of continuously casting nickel-containing steel wherein the formation of surface cracks is prevented comprising continuously casting molten nickel steel in the form of a continuous casting, the improvement wherein said molten nickel-containing steel comprises less than 0.0020% S, less than 0.0045% N, Ca in an amount from 0.0020 to 0.0070%, Ni in an amount from 5.5 to 10%, the remainder being Fe and unavoidable impurities.
Claim 3
Dependent Claim
18 words
The method of claim 1 wherein said steel also contains Ti in an amount from 0.005 to 0.015%.
Claim 4
Dependent Claim
30 words
The method of claim 1 or 2 wherein said steel also contains 0.02 to 0.10% C, 0.02 to 0.50% Si, 0.35 to 0.85% Mn, and 0.005 to 0.05% sol Al.
Claim 5
Dependent Claim
42 words
The method of claim 1 or 2 wherein said steel also contains one metal selected from the group consisting of Cu in an amount less than 0.5%, Cr in an amount less than 0.5% and Mo in an amount less than 0.5%.
Claim 6
Dependent Claim
40 words
The method of claim 3 wherein said steel also contains one metal selected from the group consisting of Cu in an amount less than 0.5%, Cr in an amount less than 0.5% and Mo in an amount less than 0.5%.
Claim 7
Dependent Claim
34 words
The method of claim 1 or 2 wherein said steel also contains Cu in an amount less than 0.5%, Cr in an amount less than 0.5%, and Mo in an amount less than 0.5%.
Claim 8
Dependent Claim
32 words
The method of claim 3 wherein said steel also contains Cu in an amount less than 0.5%, Cr in an amount less than 0.5% and Mo in an amount less than 0.5%.
References Cited (Backward Citations)
SU595418A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-10-10 | 1987-04-11 | 1987-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-10 | 1991-04-11 | 1991-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-10 | 1995-04-11 | 1995-10-11 | $7700.00 | Window Closed / Lapsed |