Patent US3872704A successfully refreshed from Google Patents.
US3872704A
Expired / Lapsed
US
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Method for manufacturing grain-oriented electrical steel sheet and strip in combination with continuous casting
Assignee: Nippon Steel Corp
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Filing: 1972-12-12
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Granted: 1975-03-25
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Expires: 1992-12-12
Abstract
Abstract A method for manufacturing grain-oriented electrical steel sheet and strip having excellent and stabilized magnetic characteristics in the rolling direction by continuous casting, in which a continuously cast steel slab containing 0.005-0.06 percent of C, not more than 4.0 percent of Si, 0.030-0.090 percent of Mn and 0.010-0.030 percent of S is, after heating to a temperature from 1250* to 1350*C, hot rolled continuously under the condition that the material is kept for 30-200 seconds in the temperature range between 1200* and 950*C, and then the material is cold rolled and annealed.
Inventors
- 👤 Tatsuo Ohya
- 👤 Eizo Sakuma
- 👤 Minoru Motoyoshi
- 👤 Masafumi Okamoto
- 👤 Kiyoshi Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:30
CPC Classifications
C; C21; C21D; C21D8/00; C21D8/12; C21D8/1216; C21D8/1222
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A METHOD FOR MANUFACTURING GRAIN-ORIENTED ELECTRICAL STEEL AND SRIP HAVING EXCELLENT AND STABILIZED MAGNETIC CHARACTERISTICS IN THE ROLLING DIRECTION BY CONTINUOUS CASTING, COMPRISING HEATING A CONTINUOUS CAST STEEL SLAB CONTAINING 0.005 -0.060 PERCENT OF CARBON, NOT MORE THAN 4.0 PERCENT OF SILICON, 0.030 - 0.090 PERCENT OF MANGANESE AND 0.010 - 0.030 PERCENT OF SULFUR TO A TEMPERATURE FROM 1250* TO 1350*C, HOT ROLLING THE SLAB CONTINUOUSLY UNDER THE CONDITION THAT THE MATERIAL IS KEPT FOR 30-200 SECONDS IN THE TEMPERATURE RANGE BETWEEN 1200* AND 950*C, AND THE COLD ROLLING AND ANNEALING THE SHEET.
Claim 2
Independent Claim
94 words
A METHOD FOR MANUFACTURING GRAIN-ORIENTED ELECTRICAL STEEL AND SRIP HAVING EXCELLENT AND STABILIZED MAGNETIC CHARACTERISTICS IN THE ROLLING DIRECTION BY CONTINUOUS CASTING, COMPRISING HEATING A CONTINUOUS CAST STEEL SLAB CONTAINING 0.005 -0.060 PERCENT OF CARBON, NOT MORE THAN 4.0 PERCENT OF SILICON, 0.030 - 0.090 PERCENT OF MANGANESE AND 0.010 - 0.030 PERCENT OF SULFUR TO A TEMPERATURE FROM 1250* TO 1350*C, HOT ROLLING THE SLAB CONTINUOUSLY UNDER THE CONDITION THAT THE MATERIAL IS KEPT FOR 30-200 SECONDS IN THE TEMPERATURE RANGE BETWEEN 1200* AND 950*C, AND THE COLD ROLLING AND ANNEALING THE SHEET.
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) | 1978-03-24 | 1978-09-23 | 1979-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-24 | 1982-09-23 | 1983-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-24 | 1986-09-23 | 1987-03-25 | $7700.00 | Window Closed / Lapsed |