US5741374A
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High strength, ductile, Co-Fe-C soft magnetic alloy
Assignee: CRS Holdings LLC
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Filing: 1997-05-14
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Granted: 1998-04-21
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Expires: 2017-05-14
Abstract
Abstract A magnetically soft, Co--Fe--C alloy is disclosed which contains in weight percent, about ______________________________________ Carbon 0.05-0.50 Manganese 0.5 max. Silicon 0.5 max. Phosphorus 0.01 max. Sulfur 0.01 max. Chrominum 1.0 max. Nickel 1.0 max. Molybdenum 0.25 max. Cobalt 14-28 Vanadium 0.1 max. Niobium 0.1 max. Tungsten 0.1 max. ______________________________________ and the balance is essentially iron. The alloy provides a yield strength of up to about 580 MPa (84 ksi) while maintaining ductility and magnetic induction comparable to the known 27Co--Fe soft magnetic alloy. Magnetic and mechanical properties are developed through an annealing heat treatment which is performed after the alloy has been mechanically worked and machined to final shape.
Inventors
- 👤 Lin Li
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:13
CPC Classifications
F; F16; F16C; F16C32/00; F16C32/04; F16C32/0406; F16C32/044; F16C32/0459; C; C22; C22C; C22C38/00; C22C38/10; C23; C23C; C23C8/00; C23C8/06; C23C8/08; C23C8/20; C23C8/22; F16C32/0468; H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/12; H01F1/14; H01F1/147
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
64 words
A magnetically soft alloy that provides a unique combination of strength, ductility, and magnetic induction consisting essentially of, in weight percent, about ______________________________________
Carbon 0.05-0.50
Manganese 0.5 max.
Silicon 0.5 max.
Phosphorus 0.01 max.
Sulfur 0.01 max.
Chrominum 1.0 max.
Nickel 1.0 max.
Molybdenum 0.25 max.
Cobalt 14-28
Vanadium 0.1 max.
Niobium 0.1 max.
Tungsten 0.1 max.
______________________________________ and the balance is essentially iron.
Claim 2
Dependent Claim
64 words
A magnetically soft alloy that provides a unique combination of strength, ductility, and magnetic induction consisting essentially of, in weight percent, about ______________________________________
Carbon 0.05-0.50
Manganese 0.5 max.
Silicon 0.5 max.
Phosphorus 0.01 max.
Sulfur 0.01 max.
Chrominum 1.0 max.
Nickel 1.0 max.
Molybdenum 0.25 max.
Cobalt 14-28
Vanadium 0.1 max.
Niobium 0.1 max.
Tungsten 0.1 max.
______________________________________ and the balance is essentially iron.
Claim 3
Dependent Claim
15 words
An alloy as set forth in claim 1 which contains at least about 0.1% carbon.
Claim 4
Dependent Claim
16 words
An alloy as set forth in claim 1 which contains not more than about 0.25% carbon.
Claim 5
Dependent Claim
15 words
An alloy as set forth in claim 1 which contains at least about 22% cobalt.
Claim 6
Dependent Claim
64 words
A magnetically soft alloy that provides a unique combination of strength, ductility, and magnetic induction, consisting essentially of, in weight percent, about ______________________________________
Carbon 0.1-0.5
Manganese 0.5 max.
Silicon 0.5 max.
Phosphorus 0.01 max.
Sulfur 0.01 max.
Chromium 0.8 max.
Nickel 0.8 max.
Molybdenum 0.25 max.
Cobalt 15-27
Vanadium 0.1 max.
Niobium 0.1 max.
Tungsten 0.1 max.
______________________________________ and the balance is essentially iron.
Claim 7
Dependent Claim
64 words
A magnetically soft alloy that provides a unique combination of strength, ductility, and magnetic induction, consisting essentially of, in weight percent, about ______________________________________
Carbon 0.1-0.5
Manganese 0.5 max.
Silicon 0.5 max.
Phosphorus 0.01 max.
Sulfur 0.01 max.
Chromium 0.8 max.
Nickel 0.8 max.
Molybdenum 0.25 max.
Cobalt 15-27
Vanadium 0.1 max.
Niobium 0.1 max.
Tungsten 0.1 max.
______________________________________ and the balance is essentially iron.
Claim 8
Dependent Claim
15 words
An alloy as set forth in claim 5 which contains at least about 0.15% carbon.
Claim 9
Dependent Claim
16 words
An alloy as set forth in claim 5 which contains not more than about 0.25% carbon.
Claim 10
Dependent Claim
15 words
An alloy as set forth in claim 5 which contains at least about 22% cobalt.
Claim 11
Dependent Claim
63 words
A magnetically soft alloy that provides a unique combination of strength, ductility, and magnetic induction, consisting essentially of, in weight percent ______________________________________
Carbon 0.05-0.50
Manganese 0.5 max.
Silicon 0.5 max.
Phosphorus 0.01 max.
Sulfur 0.01 max.
Chromium 0.8 max.
Nickel 0.8 max.
Molybdenum 0.25 max.
Cobalt 22-28
Vanadium 0.1 max.
Niobium 0.1 max.
Tungsten 0.1 max.
______________________________________ and the balance is essentially iron.
Claim 12
Dependent Claim
63 words
A magnetically soft alloy that provides a unique combination of strength, ductility, and magnetic induction, consisting essentially of, in weight percent ______________________________________
Carbon 0.05-0.50
Manganese 0.5 max.
Silicon 0.5 max.
Phosphorus 0.01 max.
Sulfur 0.01 max.
Chromium 0.8 max.
Nickel 0.8 max.
Molybdenum 0.25 max.
Cobalt 22-28
Vanadium 0.1 max.
Niobium 0.1 max.
Tungsten 0.1 max.
______________________________________ and the balance is essentially iron.
Claim 13
Dependent Claim
15 words
An alloy as set forth in claim 9 which contains at least about 0.1% carbon.
Claim 14
Dependent Claim
16 words
An alloy as set forth in claim 9 which contains not more than about 0.25% carbon.
Claim 15
Dependent Claim
15 words
An alloy as set forth in claim 9 which contains at least about 24% cobalt.
Claim 16
Dependent Claim
63 words
A magnetically soft alloy that provides a unique combination of strength, ductility, and magnetic induction, consisting essentially of, in weight percent ______________________________________
Carbon 0.05-0.50
Manganese 0.5 max.
Silicon 0.5 max.
Phosphorus 0.01 max.
Sulfur 0.01 max.
Chromium 0.8 max.
Nickel 0.8 max.
Molybdenum 0.25 max.
Cobalt 14-20
Vanadium 0.1 max.
Niobium 0.1 max.
Tungsten 0.1 max.
______________________________________ and the balance is essentially iron.
Claim 17
Dependent Claim
63 words
A magnetically soft alloy that provides a unique combination of strength, ductility, and magnetic induction, consisting essentially of, in weight percent ______________________________________
Carbon 0.05-0.50
Manganese 0.5 max.
Silicon 0.5 max.
Phosphorus 0.01 max.
Sulfur 0.01 max.
Chromium 0.8 max.
Nickel 0.8 max.
Molybdenum 0.25 max.
Cobalt 14-20
Vanadium 0.1 max.
Niobium 0.1 max.
Tungsten 0.1 max.
______________________________________ and the balance is essentially iron.
Claim 18
Dependent Claim
15 words
An alloy as set forth in claim 13 which contains at least about 0.1% carbon.
Claim 19
Dependent Claim
16 words
An alloy as set forth in claim 13 which contains not more than about 0.25% carbon.
Claim 20
Dependent Claim
15 words
An alloy as set forth in claim 9 which contains at least about 15% cobalt.
Claim 21
Dependent Claim
86 words
A magnetically soft alloy article that provides a unique combination of yield strength, ductility, and magnetic induction in the annealed condition comprising: a core formed of a magnetically soft alloy consisting essentially of, in weight percent, about ______________________________________
Carbon 0.05
Manganese 0.5 max.
Silicon 0.5 max.
Phosphorus 0.01 max.
Sulfur 0.01 max.
Chromium 1.0 max.
Nickel 1.0 max.
Molybdenum 0.25 max.
Cobalt 14-28
Vanadium 0.1 max.
Niobium 0.1 max.
Tungsten 0.1 max.
Iron Balance
______________________________________ and a carburized case layer containing about 0.1 to 0.50% carbon.
Claim 22
Dependent Claim
86 words
A magnetically soft alloy article that provides a unique combination of yield strength, ductility, and magnetic induction in the annealed condition comprising: a core formed of a magnetically soft alloy consisting essentially of, in weight percent, about ______________________________________
Carbon 0.05
Manganese 0.5 max.
Silicon 0.5 max.
Phosphorus 0.01 max.
Sulfur 0.01 max.
Chromium 1.0 max.
Nickel 1.0 max.
Molybdenum 0.25 max.
Cobalt 14-28
Vanadium 0.1 max.
Niobium 0.1 max.
Tungsten 0.1 max.
Iron Balance
______________________________________ and a carburized case layer containing about 0.1 to 0.50% carbon.
Claim 23
Dependent Claim
23 words
An alloy article as set forth in claim 17 wherein the core is formed of an alloy containing at least about 22% cobalt.
Claim 24
Dependent Claim
21 words
An alloy article as set forth in claim 17 wherein the carburized case layer contains not more than about 0.25% carbon.
Claim 25
Dependent Claim
24 words
An alloy article as set forth in claim 17 wherein the core is formed of an alloy containing not more than about 0.02% carbon.
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| 3.5 Years (Year 4) | 2001-04-20 | 2001-10-20 | 2002-04-21 | $2000.00 | Window Closed / Lapsed |
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