Patent US4648437A successfully refreshed from Google Patents.
US4648437A
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Method for producing a metal alloy strip
Assignee: Olin Corp
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Filing: 1985-12-16
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Granted: 1987-03-10
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Expires: 2005-12-16
Abstract
Abstract A method for producing a metallic strip is disclosed. A metallic melt containing above about 20% by weight of iron is formed into a strip so that fine iron particles are distributed throughout. The strip may be rolled to elongate the iron particles.
Inventors
- 👤 Michael J. Pryor
- 👤 Michael L. Santella
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:57
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/62; G11B5/64; G11B5/65; G11B5/653; B; B22; B22D; B22D11/00; B22D11/06; B22D11/0611
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
90 words
A method for producing a metal alloy strip, comprising the steps of: (a) providing a melt of metal alloy consisting essentially of about 20 to 60% by weight of iron and the balance being a material selected from the group consisting of copper and alloys thereof, said material forming a matrix; and (b) rapidly solidifying said melt into said metallic strip having substantially fine, equiaxed particles of iron or iron alloy distributes substantially homogenously throughout said matrix, said equixed particles having a width between about 0.05 to about 0.5 microns.
Claim 2
Independent Claim
90 words
A method for producing a metal alloy strip, comprising the steps of: (a) providing a melt of metal alloy consisting essentially of about 20 to 60% by weight of iron and the balance being a material selected from the group consisting of copper and alloys thereof, said material forming a matrix; and (b) rapidly solidifying said melt into said metallic strip having substantially fine, equiaxed particles of iron or iron alloy distributes substantially homogenously throughout said matrix, said equixed particles having a width between about 0.05 to about 0.5 microns.
Claim 3
Dependent Claim
37 words
The method of claim 1 wherein said step of providing a melt further includes the step of maintaining said melt at a temperature of not more than about 100° C. above the liquidus point of the melt.
Claim 4
Dependent Claim
32 words
The method of claim 1 wherein said step of providing a melt further includes the step of providing an additional metal in the melt which partitions to the copper or copper alloy.
Claim 5
Dependent Claim
34 words
The method of claim 1 wherein said step of providing a melt further includes the step of providing transition metal additions in said melt to enhance the magnetic performance of the iron alloy particles.
Claim 6
Dependent Claim
34 words
The method of claim 3 wherein said step of providing a melt further includes the step of providing transition metal additions in said melt to enhance the magnetic performance of the iron alloy particles.
Claim 7
Dependent Claim
44 words
The method of claim 1 wherein said step of solidifying said strip includes the step of cooling said melt at a rate whereby the majority of said iron or iron alloy particles are in a size range of about 0.05 to about 0.5 microns.
Claim 8
Dependent Claim
26 words
The method of claim 6 wherein said step of cooling said melt occurs at a rate of about 10 2 to about 10 8 ° K./sec.
Claim 9
Dependent Claim
21 words
The method of claim 1 further including the step of rolling said strip to elongate the iron or iron alloy particles.
Claim 10
Dependent Claim
31 words
The method of claim 8 wherein said step of rolling said strip includes forming said iron or iron alloy particles with an aspect ratio of between about 4:1 to about 15:1.
Claim 11
Dependent Claim
31 words
The method of claim 9 wherein said step of rolling said strip includes forming said iron or iron alloy particles with as aspect ratio of between about 5:1 to about 7:1.
Claim 12
Dependent Claim
28 words
The method of claim 7 wherein said step of solidifying said strip includes the step of depositing said melt on a chill surface to form a continuous strip.
Claim 13
Dependent Claim
26 words
The method of claim 8 further including the step of annealing the rolled strip at a temperature in the range of about 200° to 900° C.
Claim 14
Dependent Claim
28 words
The method of claim 8 wherein the step of rolling said strip aligns a longitudinal axis of the elongated particles substantially with a longitudinal axis of said strip.
Claim 15
Dependent Claim
17 words
The method of claim 1 further including the step of plating said strip with a protective coating.
Claim 16
Dependent Claim
17 words
The method of claim 14 further including the step of providing said protective coating from primarily copper.
Claim 17
Dependent Claim
25 words
The method of claim 15 further including the step of coating said protective coating with a stain inhibitor to prevent tarnishing, corrosion, and improve lubricity.
References Cited (Backward Citations)
US2754194A
Cited
US2754193A
Cited
US3186707A
Cited
US2967794A
Cited
US3073728A
Cited
US3265472A
Cited
US3432279A
Cited
US3583864A
Cited
US3940262A
Cited
US3838982A
Cited
US4330027A
Cited
US4257830A
Cited
US4221257A
Cited
EP0076618A2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-03-09 | 1990-09-08 | 1991-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-09 | 1994-09-08 | 1995-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-09 | 1998-09-08 | 1999-03-10 | $7700.00 | Window Closed / Lapsed |