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US4482402A
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Dynamic annealing method for optimizing the magnetic properties of amorphous metals
Assignee: General Electric Co
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Filing: 1983-08-01
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Granted: 1984-11-13
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Expires: 2003-08-01
Abstract
Abstract The magnetic properties of metallic alloys in amorphous form are optimized in as-formed configurations by the dynamic annealing process of this invention.
Inventors
- 👤 Alan I. Taub
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:14
CPC Classifications
C; C21; C21D; C21D9/00; C21D9/52; C21D9/54; C21D9/56; H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/12; H01F1/14; H01F1/147; H01F1/153; H01F1/15341; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49071
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
112 words
A method for dynamically annealing amorphous metallic material comprising the steps of: (a) forming a single thickness of amorphous metallic material to a predetermined configuration; (b) heating the formed single thickness of amorphous metallic material to the highest peak temperature at the most rapid heating rate attainable subject to the proviso that substantially no crystallization is induced in said material in the time required during this heating step to reduce the stresses in said material by at least 90% of the stresses present in said material immediately prior to initiation of said heating step; and (c) immediately rapidly cooling the formed single thickness of amorphous metallic material while maintaining said predetermined configuration.
Claim 2
Independent Claim
112 words
A method for dynamically annealing amorphous metallic material comprising the steps of: (a) forming a single thickness of amorphous metallic material to a predetermined configuration; (b) heating the formed single thickness of amorphous metallic material to the highest peak temperature at the most rapid heating rate attainable subject to the proviso that substantially no crystallization is induced in said material in the time required during this heating step to reduce the stresses in said material by at least 90% of the stresses present in said material immediately prior to initiation of said heating step; and (c) immediately rapidly cooling the formed single thickness of amorphous metallic material while maintaining said predetermined configuration.
Claim 3
Dependent Claim
18 words
A method of claim 1 wherein said amorphous metallic material is in the form of a ribbon-like body.
Claim 4
Dependent Claim
32 words
The method of claim 1 wherein said stresses in said material are reduced by at least 95% of the stresses present in said material immediately prior to initiation of said heating step.
Claim 5
Dependent Claim
18 words
The method of claim 1 wherein said heating is conducted at a rate greater than about 300° C./min.
Claim 6
Dependent Claim
36 words
The method of claim 1 wherein said heating is performed by means of an impinging beam from a source selected from the group consisting of a laser beam source, electron beam source, and radiant heat source.
Claim 7
Dependent Claim
15 words
The method of claim 1 wherein said heating is performed by means of resistance self-heating.
Claim 8
Dependent Claim
18 words
The method of claim 1 wherein said cooling is conducted at a rate greater than about 100° C./min.
Claim 9
Independent Claim
114 words
A method for dynamically annealing amorphous metallic material comprising the steps of: (a) forming a single thickness of amorphous metallic material to a predetermined configuration; (b) heating the formed single thickness of amorphous metallic material to the highest peak temperature attainable at a rate greater than about 300° C./min subject to the proviso that substantially no crystallization is induced in said material in the time required during this heating step to reduce the stresses in said material by at least 90% of the stresses present in said material immediately prior to initiation of said heating step; and (c) immediately rapidly cooling the formed signal thickness of amorphous metallic material while maintaining said predetermined configuration.
Claim 10
Independent Claim
114 words
A method for dynamically annealing amorphous metallic material comprising the steps of: (a) forming a single thickness of amorphous metallic material to a predetermined configuration; (b) heating the formed single thickness of amorphous metallic material to the highest peak temperature attainable at a rate greater than about 300° C./min subject to the proviso that substantially no crystallization is induced in said material in the time required during this heating step to reduce the stresses in said material by at least 90% of the stresses present in said material immediately prior to initiation of said heating step; and (c) immediately rapidly cooling the formed signal thickness of amorphous metallic material while maintaining said predetermined configuration.
Claim 11
Dependent Claim
18 words
The method of claim 8 wherein said amorphous metallic material is in the form of a ribbon-like body.
Claim 12
Dependent Claim
32 words
The method of claim 8 wherein said stresses in said material are reduced by at least 95% of the stresses present in said material immediately prior to initiation of said heating step.
Claim 13
Dependent Claim
36 words
The method of claim 8 wherein said heating is performed by means of an impinging beam from a source selected from the group consisting of a laser beam source, electron beam source, and radiant heat source.
Claim 14
Dependent Claim
15 words
The method of claim 8 wherein said heating is performed by means of resistance self-heating.
Claim 15
Dependent Claim
18 words
The method of claim 8 wherein said cooling is conducted at a rate greater than about 100° C./min.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-11-13 | 1988-05-14 | 1988-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-13 | 1992-05-14 | 1992-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-13 | 1996-05-14 | 1996-11-13 | $7700.00 | Window Closed / Lapsed |