US4337087A
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Microcrystalline thin strip for magnetic material having high permeability, a method of producing the same and articles made from the thin strip
Assignee: Proterial Ltd
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Filing: 1980-05-10
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Granted: 1982-06-29
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Expires: 2000-05-10
Abstract
Abstract PCT No. PCT/JP80/00100 Sec. 371 Date Jan. 16, 1981 Sec. 102(e) Date Jan. 9, 1981 PCT Filed May 10, 1980 PCT Pub. No. WO80/02620 PCT Pub. Date Nov. 27, 1980. Microcrystalline thin strips for highly permeable magnetic material having a tensile strength of more than 35 kg/mm2 and a bending fracture strain of more than 8x10-3 and consisting of 7.0-9.6% of Si, 5.5-7.5% of Al, 0.3-3.0% of Mo, 0.3-4.0% of Ni, 0-0.5% of Ca and the remainder being substantially Fe. The thin strips are easy to produce and have high tensile strength and flexibility. Thus the thin strips can be used for a variety of magnetic materials by working the thin strips. Two examples of commercial utility of the invention include a core for a voltage or current transformer and a magnetic head core for use in recording devices.
Inventors
- 👤 Kiyoyuki Esashi
- 👤 Hisae Minatono
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:06
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/06; B; B22; B22D; B22D11/00; B22D11/06; C22C38/02; C22C45/00; C22C45/02; H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/12; H01F1/14; H01F1/147; H01F1/14766; H01F1/14791; H01F1/153; H01F1/15308
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
52 words
A microcrystalline thin strip for magnetic material having high permeability which consists of 7.0-9.6% of Si, 5.5-7.5% of Al, 0.3-3.0% of Mo, 0.3-4.0% of Ni and the remainder being substantially Fe has a tensile strength of more than 35 kg/mm 2 and a bending fracture strain of more than 8×10 -3 .
Claim 2
Dependent Claim
52 words
A microcrystalline thin strip for magnetic material having high permeability which consists of 7.0-9.6% of Si, 5.5-7.5% of Al, 0.3-3.0% of Mo, 0.3-4.0% of Ni and the remainder being substantially Fe has a tensile strength of more than 35 kg/mm 2 and a bending fracture strain of more than 8×10 -3 .
Claim 3
Dependent Claim
79 words
A microcrystalline thin strip for magnetic material having high permeability, a tensile strength of more than 35 kg/mm 2 and a bending rupture strain of more than 8×10 -3 , which is obtained by ejecting a molten metal consisting of 7.0-9.6% of Si, 5.5-7.5% of Al, 0.3-3.0% of Mo, 0.3-4.0% of Ni, and the remainder being ssubstantially Fe onto the moving cooling surface of one or more cooling substances from a nozzle and quenching and solidifying the molten metal.
Claim 4
Dependent Claim
79 words
A microcrystalline thin strip for magnetic material having high permeability, a tensile strength of more than 35 kg/mm 2 and a bending rupture strain of more than 8×10 -3 , which is obtained by ejecting a molten metal consisting of 7.0-9.6% of Si, 5.5-7.5% of Al, 0.3-3.0% of Mo, 0.3-4.0% of Ni, and the remainder being ssubstantially Fe onto the moving cooling surface of one or more cooling substances from a nozzle and quenching and solidifying the molten metal.
Claim 5
Independent Claim
84 words
A method for producing a microcrystalline thin strip for magnetic material having high permeability, a tensile strength of more than 35 kg/mm 2 and a bending rupture strain of more than 8×10 -3 , which comprises ejecting a molten metal consisting of 7.0-9.6% of Si, 5.5-7.5% of Al, 0.3-3.0% of Mo, 0.3-4.0% of Ni, 0-0.5% of Ca and the remainder being substantially Fe onto the moving cooling surface of one or more cooling substances from a nozzle and quenching and solidifying the molten metal.
Claim 6
Independent Claim
84 words
A method for producing a microcrystalline thin strip for magnetic material having high permeability, a tensile strength of more than 35 kg/mm 2 and a bending rupture strain of more than 8×10 -3 , which comprises ejecting a molten metal consisting of 7.0-9.6% of Si, 5.5-7.5% of Al, 0.3-3.0% of Mo, 0.3-4.0% of Ni, 0-0.5% of Ca and the remainder being substantially Fe onto the moving cooling surface of one or more cooling substances from a nozzle and quenching and solidifying the molten metal.
Claim 7
Dependent Claim
66 words
A core for a voltage or current transformer manufactured from a microcrystalline thin strip for magnetic material having high permeability which consists of 7.0-9.6% of Si, 5.5-7.5% of Al, 0.3-3.0% of Mo, 0.3-4.0% of Ni, 0-0.5% of Ca and the remainder being substantially Fe and has a tensile strength of more than 35 kg/mm 2 and a bending fracture strain of more than 8×10 -3 .
Claim 8
Dependent Claim
66 words
A core for a voltage or current transformer manufactured from a microcrystalline thin strip for magnetic material having high permeability which consists of 7.0-9.6% of Si, 5.5-7.5% of Al, 0.3-3.0% of Mo, 0.3-4.0% of Ni, 0-0.5% of Ca and the remainder being substantially Fe and has a tensile strength of more than 35 kg/mm 2 and a bending fracture strain of more than 8×10 -3 .
Claim 9
Dependent Claim
62 words
A magnetic head core manufactured from a microcrystalline thin strip for magnetic material having high permeability which consists of 7.0-9.6% of Si, 5.5-7.5% of Al, 0.3-3.0% of Mo, 0.3-4.0% of Ni, 0-0.5% of Ca and the remainder being substantially Fe and has a tensile strength of more than 35 kg/mm 2 and a bending fracture strain of more than 8×10 -3 .
Claim 10
Dependent Claim
62 words
A magnetic head core manufactured from a microcrystalline thin strip for magnetic material having high permeability which consists of 7.0-9.6% of Si, 5.5-7.5% of Al, 0.3-3.0% of Mo, 0.3-4.0% of Ni, 0-0.5% of Ca and the remainder being substantially Fe and has a tensile strength of more than 35 kg/mm 2 and a bending fracture strain of more than 8×10 -3 .
Claim 11
Dependent Claim
65 words
A microcrystalline thin strip for magnetic material having high permeability which consists of 7.0-9.6% of Si, 5.5-7.5% of Al, 0.3-3.0% of Mo, 0.3-4.0% of Ni, Ca which does not include O but includes not more than 0.5%, and the remainder being substantially Fe and has a tensile strength of more than 35 kg/mm 2 and a bending fracture strain of more than 8×10 -3 .
Claim 12
Dependent Claim
65 words
A microcrystalline thin strip for magnetic material having high permeability which consists of 7.0-9.6% of Si, 5.5-7.5% of Al, 0.3-3.0% of Mo, 0.3-4.0% of Ni, Ca which does not include O but includes not more than 0.5%, and the remainder being substantially Fe and has a tensile strength of more than 35 kg/mm 2 and a bending fracture strain of more than 8×10 -3 .
Claim 13
Dependent Claim
91 words
A microcrystalline thin strip for magnetic material having high permeability, a tensile strength of more than 35 kg/mm 2 and a bending fracture strain of more than 8×10 -3 , which is obtained by ejecting a molten metal consisting of 7.0-9.6% of Si, 5.5-7.5% of Al, 0.3-3.0% of Mo, 0.3-4.0% of Ni, Ca which does not include O but includes not more than 0.5%, and the remainder being substantially Fe onto the moving cooling surface of one or more cooling substances from a nozzle and quenching and solidifying the molten metal.
Claim 14
Dependent Claim
91 words
A microcrystalline thin strip for magnetic material having high permeability, a tensile strength of more than 35 kg/mm 2 and a bending fracture strain of more than 8×10 -3 , which is obtained by ejecting a molten metal consisting of 7.0-9.6% of Si, 5.5-7.5% of Al, 0.3-3.0% of Mo, 0.3-4.0% of Ni, Ca which does not include O but includes not more than 0.5%, and the remainder being substantially Fe onto the moving cooling surface of one or more cooling substances from a nozzle and quenching and solidifying the molten metal.
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) | 1985-06-28 | 1985-12-28 | 1986-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-28 | 1989-12-28 | 1990-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-28 | 1993-12-28 | 1994-06-29 | $7700.00 | Window Closed / Lapsed |