US4280856A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing grain-oriented silicon steel sheets having a very high magnetic induction and a low iron loss
Assignee: JFE Steel Corp
•
Filing: 1980-01-04
•
Granted: 1981-07-28
•
Expires: 2000-01-04
Abstract
Abstract Grain-oriented silicon steel sheets having a very high magnetic induction and a low iron loss are produced by using a small amount of Mo and Sb and a slight amount of at least one of Se and S as an inhibitor for growing crystal grains.
Inventors
- 👤 Yukio Inokuti
- 👤 Yoh Shimizu
- 👤 Hiroshi Shimanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:10
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/12; H01F1/14; H01F1/147; H01F1/14766; H01F1/14775; C; C21; C21D; C21D8/00; C21D8/12; C22; C22C; C22C38/00; C22C38/02; C21D8/1216; C21D8/1233; C21D8/1244
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
130 words
In a method for producing grain-oriented silicon steel sheets having a very high magnetic induction and a low iron loss, in which a silicon steel material containing not more than 0.06% of C, 2.0-4.0% of Si, 0.005-0.20% of Sb and not more than 0.10% of at least one of Se and S is hot rolled and the hot rolled sheet is repeatedly subjected to annealing and cold rolling to obtain a cold rolled steel sheet having a final gauge, then subjected to primary recrystallizing annealing concurrently to effect decarburization, and to final annealing at a temperature of 820°-900° C. for 10-80 hours, and to grow secondary recrystallized grains of [110] <100> orientation, the improvement comprises adding Mo of 0.01 to 0.10% to the above-described silicon steel material as an inhibitor.
Claim 2
Dependent Claim
130 words
In a method for producing grain-oriented silicon steel sheets having a very high magnetic induction and a low iron loss, in which a silicon steel material containing not more than 0.06% of C, 2.0-4.0% of Si, 0.005-0.20% of Sb and not more than 0.10% of at least one of Se and S is hot rolled and the hot rolled sheet is repeatedly subjected to annealing and cold rolling to obtain a cold rolled steel sheet having a final gauge, then subjected to primary recrystallizing annealing concurrently to effect decarburization, and to final annealing at a temperature of 820°-900° C. for 10-80 hours, and to grow secondary recrystallized grains of [110] <100> orientation, the improvement comprises adding Mo of 0.01 to 0.10% to the above-described silicon steel material as an inhibitor.
Claim 3
Dependent Claim
28 words
The method as claimed in claim 1, wherein not more than 0.10% of at least one of Se, S and Te is added to the silicon steel material.
References Cited (Backward Citations)
US3218202A
Cited
US3853641A
Cited
US3556873A
Cited
US3802936A
Cited
US3932234A
Cited
US3908432A
Cited
US3986902A
Cited
US4174235A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-07-27 | 1985-01-26 | 1985-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-27 | 1989-01-26 | 1989-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-27 | 1993-01-26 | 1993-07-28 | $7700.00 | Window Closed / Lapsed |