EP0113186A2
Expired / Lapsed
EP
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Method of manufacturing fine filamentary Nb-Ti based alloy superconducting wire
Assignee: Toshiba Corp
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Filing: 1983-11-29
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Granted: —
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Expires: 2003-11-29
Abstract
Abstract A method of manufacturing a fine multifilamentary Nb-Ti based superconducting wire was disclosed, which comprises a first step of processing an alloy consisting essentially of 10 to 50 atomic % of niobium, 40 to 75 atomic % of titanium and no higher than 30 atomic % of least one element selected from a group consisting of hafnium, tantalum and tungsten to form an alloy wire, a second step of covering said alloy wire with a stabilizer, cold drawing the resultant wire, bundling a plurality of a stabilizer-clad wires thus obtained, covering the bundle of wires with a stabilizer, and extruding and cold drawing the resultant bundled wire to thereby form a multifilamentary wire, and a third step of thermally treating the resultant multifilamentary wire at a temperature of 250 to 600°C and drawing the resultant treated multifilamentary wire to a reduction rate of 30 to 99.9 %. The third step is carried out more than once.
Inventors
- 👤 Hitoshi Wada
- 👤 Kyoji Tachikawa
- 👤 Yutaka Yamada
- 👤 Satoru Murase
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 04:01
CPC Classifications
H; H10; H10N; H10N60/00; H10N60/80; H10N60/85; H10N60/01; H10N60/0156; Y; Y10; Y10S; Y10S505/00; Y10S505/80; Y10S505/815; Y10S505/825; Y10S505/917; Y10S505/918; Y10S505/919; Y10S505/921; Y10S505/928; Y10S505/929; Y10S505/93; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49014
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
156 words
A method of manufacturing a fine multi- filamentary Nb-Ti based superconducting wire comprising: a first step of processing an alloy consisting essentially of 10 to 50 atomic %of niobium, 40 to 75 atomic % of titanium and no higher than 30 atomic % of at least one element selected from a group consisting of hafnium, tantalum and tungsten to form an alloy wire; and a second step of covering said alloy wire with a stabilizer, cold drawing the resultant wire, bundling a plurality of stabilizer-clad wires thus obtained, covering the bundle of wires with a stabilizer, and extruding and cold drawing the resultant bundled wires to thereby form a multifilamentary wire, characterized by further comprising a third step of thermally treating said multifilamentary wire at a temperature of 250 to 600°C and drawing the resultant treated filamentary wire to a reduction rate of 30 to 99.9 %, said third step being carried out more than once.
Claim 2
Independent Claim
156 words
A method of manufacturing a fine multi- filamentary Nb-Ti based superconducting wire comprising: a first step of processing an alloy consisting essentially of 10 to 50 atomic %of niobium, 40 to 75 atomic % of titanium and no higher than 30 atomic % of at least one element selected from a group consisting of hafnium, tantalum and tungsten to form an alloy wire; and a second step of covering said alloy wire with a stabilizer, cold drawing the resultant wire, bundling a plurality of stabilizer-clad wires thus obtained, covering the bundle of wires with a stabilizer, and extruding and cold drawing the resultant bundled wires to thereby form a multifilamentary wire, characterized by further comprising a third step of thermally treating said multifilamentary wire at a temperature of 250 to 600°C and drawing the resultant treated filamentary wire to a reduction rate of 30 to 99.9 %, said third step being carried out more than once.
Claim 3
Dependent Claim
43 words
The method according to claim 1, characterized in that said alloy consists essentialy of 15 to 40 atmoic % of niobium, 45 to 75 atomic % of titanium and 0.5 to 20 atomic % of an element selected from hafnium, tantalum and tungsten.
Claim 4
Dependent Claim
18 words
The method according to claim 1, characterized in that the drawing in said third step is clod drawing.
Claim 5
Dependent Claim
18 words
The method according to claim 1, characterized in that the drawing in said third step is warm drawing.
Claim 6
Dependent Claim
19 words
The method according to claim 4, characterized in that the temperature of said warm drawing is 300°C or less.
Claim 7
Dependent Claim
27 words
The method according to claim 1, characterized in that the thermal treatment in said third step is carried out in an inert gas atmosphere or in vacuum.
Claim 8
Dependent Claim
23 words
The method according to claim 1, characterized in that the temperature of the thermal treatment in said third step is 300 to 500°C.
Claim 9
Dependent Claim
26 words
The method according to claim 1, characterized in that said third step is carried out a plurality of times and includes cold drawing and warm drawing.
Claim 10
Dependent Claim
23 words
The method according ot claim 1, characterized in that the thermal treatment in said third step is done for 2 to 1,000 hours.
Claim 11
Dependent Claim
29 words
The method according to claim 1, characterized in that the drawing in said third step is accompanied by cooling of the wire immediately after passing through the drawing die.
Claim 12
Dependent Claim
32 words
The method according to claim 1, characterized in that the extrusion and drawing in said first and second steps is done to a reduction ratio of 10 3 to 10 6 .
Claim 13
Dependent Claim
17 words
The method according to claim 1, characterized in that said stabilizer is made of copper or aluminum.
References Cited (Backward Citations)
No citation records indexed.
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