US4134779A
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Iron-boron solid solution alloys having high saturation magnetization
Assignee: Honeywell International Inc
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Filing: 1977-06-21
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Granted: 1979-01-16
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Expires: 1997-06-21
Abstract
Abstract Ferromagnetic substitutional solid solution alloys characterized by high saturation magnetization and having a bcc structure are provided. The alloys consist essentially of about 4 to 12 atom percent boron, balance essentially iron plus incidental impurities.
Inventors
- 👤 Ranjan Ray
- 👤 Ryusuke Hasegawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:40
CPC Classifications
C; C22; C22C; C22C45/00; C22C45/02; H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/12; H01F1/14; H01F1/147; H01F1/153; H01F1/15308
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
61 words
A ferromagnetic material, having a saturation magnetization ranging from 16.6 to 20.0 k Gauss, a hardness ranging from 425 to 919 kg/mm 2 and an ultimate tensile strength ranging from 206 to 360 ksi and having a single phase formed in body centered cubic structure, consisting essentially of about 4 to 12 atom percent boron, balance essentially iron plus incidental impurities.
Claim 2
Dependent Claim
61 words
A ferromagnetic material, having a saturation magnetization ranging from 16.6 to 20.0 k Gauss, a hardness ranging from 425 to 919 kg/mm 2 and an ultimate tensile strength ranging from 206 to 360 ksi and having a single phase formed in body centered cubic structure, consisting essentially of about 4 to 12 atom percent boron, balance essentially iron plus incidental impurities.
Claim 3
Dependent Claim
22 words
The ferromagnetic material of claim 1 consisting essentially of about 4 to 6 atom percent boron, balance essentially iron plus incidental impurities.
Claim 4
Dependent Claim
13 words
The ferromagnetic material of claim 1 in the form of substantially continuous filaments.
Claim 5
Dependent Claim
109 words
A process for fabricating substantially continuous filaments of a ferromagnetic material, having a saturation magnetization ranging from 16.6 to 20.0 k Gauss, a hardness ranging from 425 to 919 kg/mm 2 and an ultimate tensile strength from 206 to 306 ksi and having a single phase formed in body centered cubic structure, consisting essentially of about 4 to 12 atom percent boron, balance essentially iron plus incidental impurities, which comprises (a) forming a melt of the material; (b) depositing the melt on a rapidly rotating quench surface; and (c) quenching the melt at a rate of about 10 4 to 10 6 ° C./sec to form the continuous filament.
Claim 6
Dependent Claim
109 words
A process for fabricating substantially continuous filaments of a ferromagnetic material, having a saturation magnetization ranging from 16.6 to 20.0 k Gauss, a hardness ranging from 425 to 919 kg/mm 2 and an ultimate tensile strength from 206 to 306 ksi and having a single phase formed in body centered cubic structure, consisting essentially of about 4 to 12 atom percent boron, balance essentially iron plus incidental impurities, which comprises (a) forming a melt of the material; (b) depositing the melt on a rapidly rotating quench surface; and (c) quenching the melt at a rate of about 10 4 to 10 6 ° C./sec to form the continuous filament.
Claim 7
Dependent Claim
18 words
The process of claim 4 in which the quench rate is at least about 10 5 ° C./sec.
Claim 8
Dependent Claim
26 words
The process of claim 4 in which the ferromagnetic material consists essentially of about 4 to 6 atom percent boron, balance essentially iron plus incidental impurities.
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) | 1982-01-15 | 1982-07-17 | 1983-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-15 | 1986-07-17 | 1987-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-15 | 1990-07-17 | 1991-01-16 | $7700.00 | Window Closed / Lapsed |