US3710844A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing superconducting strips
Assignee: Hitachi Ltd
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Filing: 1968-02-20
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Granted: 1973-01-16
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Expires: 1988-02-20
Abstract
Abstract A method of producing a superconducting strip, comprising continuously passing a superconducting wire or tape through a mold, casting a molten stabilizing metal for said wire into said mold, cooling the molten stabilizing metal during its passage through said mold along the travelling path of said wire with said wire embedded therein to thereby solidify said molten stabilizing metal in close contact with said wire and continuously drawing the resultant superconducting strip from said mold; and an apparatus for practicing said method. The superconducting strip produced according to the present invention is free from breakage of the wire, has highly uniform and excellent properties and can be produced at lower cost than the conventional ones.
Inventors
- 👤 T Doi
- 👤 M Kudo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:39
CPC Classifications
H; H10; H10N; H10N60/00; H10N60/01; H10N60/0128; B; B22; B22D; B22D11/00; B22D11/008; Y; Y10; Y10S; Y10S505/00; Y10S505/825; Y10S505/912; Y10S505/913; Y10S505/915; Y10S505/916; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49014
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
151 words
A method of producing a superconducting strip comprising the steps of: a. continuously passing a superconducting wire made of at least one member selected from the group consisting of Nb-Zr binary alloy-type and Nb-Zr side Nb-Zr-Ti ternary alloy-type through a mold defining therein a passage having the same transverse cross-sectional shape as that of said superconducting strip; then b. continuously casting molten aluminum at a temperature in the range from 700* to 800* C into said mold; then c. applying a heat treatment to said superconducting wire by cooling said aluminum and maintaining said cast aluminum coated superconducting wire at a temperature in the range from 600* to 700* C for a predetermined period of time of between 10 to 60 minutes; and then d. further cooling said cast aluminum coated superconducting wire to room temperature to thereby obtain a superconducting strip and continuously drawing the resultant strip from said mold.
Claim 2
Independent Claim
151 words
A method of producing a superconducting strip comprising the steps of: a. continuously passing a superconducting wire made of at least one member selected from the group consisting of Nb-Zr binary alloy-type and Nb-Zr side Nb-Zr-Ti ternary alloy-type through a mold defining therein a passage having the same transverse cross-sectional shape as that of said superconducting strip; then b. continuously casting molten aluminum at a temperature in the range from 700* to 800* C into said mold; then c. applying a heat treatment to said superconducting wire by cooling said aluminum and maintaining said cast aluminum coated superconducting wire at a temperature in the range from 600* to 700* C for a predetermined period of time of between 10 to 60 minutes; and then d. further cooling said cast aluminum coated superconducting wire to room temperature to thereby obtain a superconducting strip and continuously drawing the resultant strip from said mold.
Claim 3
Independent Claim
136 words
A method of producing a superconducting strip consisting of a superconducting wire made of at least one member selected from the group consisting of Nb-Zr binary alloy-type Nb-Zr side Nb-Zr-Ti ternary alloy-type superconducting material embedded in a stabilizing metal, which comprises the steps of: a. subjecting said superconducting wire to a pre-heat treatment at a temperature in the range from 500* to 700* C for 30 to 60 minutes; then b. continuously passing said pre-heated superconducting wire through a mold defining therein a passage having a desired transverse cross-sectional shape then c. casting a molten aluminum metal at a temperature in the range from 700* to 800* C into said mold and then d. cooling said cast aluminum and superconducting wire to room temperature within 10 minutes and continuously drawing the resultant strip from said mold.
Claim 4
Independent Claim
136 words
A method of producing a superconducting strip consisting of a superconducting wire made of at least one member selected from the group consisting of Nb-Zr binary alloy-type Nb-Zr side Nb-Zr-Ti ternary alloy-type superconducting material embedded in a stabilizing metal, which comprises the steps of: a. subjecting said superconducting wire to a pre-heat treatment at a temperature in the range from 500* to 700* C for 30 to 60 minutes; then b. continuously passing said pre-heated superconducting wire through a mold defining therein a passage having a desired transverse cross-sectional shape then c. casting a molten aluminum metal at a temperature in the range from 700* to 800* C into said mold and then d. cooling said cast aluminum and superconducting wire to room temperature within 10 minutes and continuously drawing the resultant strip from said mold.
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) | 1976-01-16 | 1976-07-17 | 1977-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-16 | 1980-07-17 | 1981-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-16 | 1984-07-17 | 1985-01-16 | $7700.00 | Window Closed / Lapsed |