US4501316A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of casting amorphous metals
Assignee: Allegheny Ludlum Corp
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Filing: 1983-08-31
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Granted: 1985-02-26
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Expires: 2003-08-31
Abstract
Abstract An amorphous Fe-B-Si alloy and article made therefrom is provided having improved castability while maintaining good magnetic properties, ductility and improved thermal stability. Fe-B-Si alloys containing 0.1-4.0% Cr, in atomic percent, have improved castability and amorphousness. An alloy is provided generally consisting essentially of 6-10% B, 14-17% Si, 0.1-4.0% Cr, and the balance iron, and no more than incidental impurities. A method of casting an amorphous strip material from the alloy is also provided.
Inventors
- 👤 S. Leslie Ames
- 👤 Thomas H. Gray
- 👤 Lewis L. Kish
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:23
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/12; H01F1/14; H01F1/147; H01F1/153; H01F1/15341; C; C22; C22C; C22C45/00; C22C45/02
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
162 words
A method of casting an amorphous strip material having a width of at least one inch, a thickness of at least 0.001 inch, a 60 Hertz core loss of less than 0.163 watts per pound at 12.6 kilogauss, saturation magnetization (B 75H ) of at least 14 kilogauss, a coercive force of less than 0.045 oersteds and is at least singularly ductile, comprising the steps of: melting an alloy consisting essentially of 6-10% boron and 14-17% silicon, 0.5-3.0% chromium, by atomic percentages, with no more than incidental impurities, and the balance iron; while maintaining the alloy molten, continuously delivering a stream of molten alloy through a slotted nozzle and onto a casting surface disposed within 0.025 inch of the nozzle; continuously moving the casting surface past the nozzle at a speed of 200 to 10,000 linear surface feet per minute; at least partially solidifying the strip on the casting surface; and separating the at least partially solidified strip from the casting surface.
Claim 2
Independent Claim
162 words
A method of casting an amorphous strip material having a width of at least one inch, a thickness of at least 0.001 inch, a 60 Hertz core loss of less than 0.163 watts per pound at 12.6 kilogauss, saturation magnetization (B 75H ) of at least 14 kilogauss, a coercive force of less than 0.045 oersteds and is at least singularly ductile, comprising the steps of: melting an alloy consisting essentially of 6-10% boron and 14-17% silicon, 0.5-3.0% chromium, by atomic percentages, with no more than incidental impurities, and the balance iron; while maintaining the alloy molten, continuously delivering a stream of molten alloy through a slotted nozzle and onto a casting surface disposed within 0.025 inch of the nozzle; continuously moving the casting surface past the nozzle at a speed of 200 to 10,000 linear surface feet per minute; at least partially solidifying the strip on the casting surface; and separating the at least partially solidified strip from the casting surface.
Claim 3
Dependent Claim
47 words
The method as set forth in claim 1 wherein said alloy consists essentially of 6 up to less than 10% boron, from more than 15% up to 17% silicon and 0.5 to 3.0% chromium, by atomic percentages, with no more than incidental impurities and the balance iron.
References Cited (Backward Citations)
US4236946A
Cited
JPS56257A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-02-26 | 1988-08-27 | 1989-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-26 | 1992-08-27 | 1993-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-26 | 1996-08-27 | 1997-02-26 | $7700.00 | Window Closed / Lapsed |