US3618206A - Process for the production of superconductive metallic conductors - Google Patents

Process for the production of superconductive metallic conductors Download PDF

Info

Publication number
US3618206A
US3618206A US811478A US3618206DA US3618206A US 3618206 A US3618206 A US 3618206A US 811478 A US811478 A US 811478A US 3618206D A US3618206D A US 3618206DA US 3618206 A US3618206 A US 3618206A
Authority
US
United States
Prior art keywords
wires
superconductive
group
profiled
lengths
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US811478A
Other languages
English (en)
Inventor
Paul Gubler
Gundolf Meyer
Jean Marie Rayroux
Hansueli Schurch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BBC Brown Boveri AG Germany
Original Assignee
Bbc Brown Boveri & Cie
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bbc Brown Boveri & Cie filed Critical Bbc Brown Boveri & Cie
Application granted granted Critical
Publication of US3618206A publication Critical patent/US3618206A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B12/00—Superconductive or hyperconductive conductors, cables, or transmission lines
    • H01B12/02—Superconductive or hyperconductive conductors, cables, or transmission lines characterised by their form
    • H01B12/10—Multi-filaments embedded in normal conductors
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N60/00—Superconducting devices
    • H10N60/01—Manufacture or treatment
    • H10N60/0128—Manufacture or treatment of composite superconductor filaments
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/60—Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S505/00—Superconductor technology: apparatus, material, process
    • Y10S505/825—Apparatus per se, device per se, or process of making or operating same
    • Y10S505/917—Mechanically manufacturing superconductor
    • Y10S505/928—Metal deforming
    • Y10S505/93—Metal deforming by drawing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49014—Superconductor

Definitions

  • a first group of these lengths is then drawn or rolled to provide a first group of profiled wires having ribs along opposite sides, a second group of these lengths is similarly worked to provide a second group of profiled wires having grooves along opposite sides, and the wires of the first and second groups are then joined together in alternation and in side-by-side relation such that the ribs and grooves interconnect.
  • the joined together lengths are then Worked again to establish the final profile of the conductor.
  • the invention relates to a process for the production of superconductive metallic conductors consisting of a normally conductive stabilizer metal in which superconductive wires distributed over the cross-section of the conductor are embedded.
  • a copper strip comprising a plurality of suitably shaped longitudinal grooves is first produced.
  • a superconductive Wire is now pressed into each of these longitudinal grooves, and the grooves are thereafter closed up to a suitable smaller cross-section by rolling or drawing the conductor strip.
  • This process involves the Patented Nov. 9, 1971 use of superconductive wires of relatively small diam-' eter which are themselves very expensive to produce.
  • the process according to the invention is characterized by shaping superconductive rods, by introducing these rods into bores in a plurality of press-blocks of stabilizer metal, by gas-tight closure of the bores in each pressblock in the absence of oxygen by at least one closure piece of stabilizer metal, by continuous pressing of these press-blocks and subsequent drawing and/ or rolling out to profiled wires with grooves and ribs, by subsequent joining of these profiled wires in such a manner that each rib on a profiled Wire engages in a groove in a neighboring profiled wire, and by rolling and/or drawing the joined profiled wires together to the final profile of the conductor.
  • FIG. 1 is a view in section of an ingot of superconductive material encased by a copper sheath prior to being pressed out;
  • FIG. 2a is a vieW in section of a short piece of the ingot after being drawn out into a continuous length
  • FIG. 2b is a view similar to FIG. Zn from which the copper sheath has been removed;
  • FIG. 3 is a view in section of a press-block in which are incorporated a plurality of the short lengths of the ingot as shown in FIG. 2b;
  • FIGS. 4a, 4b and 40 show three different variants of ⁇ he press-block after being pressed out into a continuous ength.
  • the superconductive material with a composition of for example 58% by weight of niobium and 42% by Weight of titanium, is available in the form of ingots of about 35 kg. each.
  • a cylindrical member 1 (FIG. 1) is produced from each ingot by suitable treatment.
  • This superconductive member 1 is inserted into a pot-like sheath 2 made of copper which is closed in air-tight fashion by a conical closure piece 3 by electron-beam welding in a vacuum.
  • the member 1 thus provided with a copper sheath 2, 3 constitutes a press-block which is pressed out into a continuous length in a suitable press at a temperature of about 700 to 850 C.
  • the pressed-out continuous length is now subjected to a drawing operation and finally straightened. While hot-pressing is in progress, the airtight copper sheath prevents any contact between the superconductive niobium-titanium alloy and the atmospheric oxygen and thus prevents the formation of troublesome oxides of the components of the alloy.
  • the continuous length thus produced comprising a superconductive core inside an external copper jacket is now cut up into a plurality of pieces 4 (FIG. 2a) of equal length from which the copper jacket is removed, for
  • Each of these pressblocks 6 consists of a substantially cylindrical main member 7 made of copper and comprising, for example, four bores 8 distributed over its cross-section, a rod 5 of superconductive material being inserted into each bore.
  • the main member 7 is closed in air-tight fashion by closure pieces 10 and 11 by electron-beam welding at 9 in a vacuum.
  • Each of the press-blocks 6 thus completed is thereafter pressed out into a continuous length of substantially rectangular cross-sectional profile at a temperature of 700 to 850 C.
  • Two types of profiled wires are now produced from these continuous pressings by multiple cold drawing.
  • profiled wires 12 and 13 having the cross-sectional shapes shown in FIG. 4a are produced.
  • the shape of the profile imparted in the course of the preparatory continuous pressing closely approaches the shape of the profile which it is desired subsequently to obtain in each case by cold drawing. After the drawing operation, the profiled wires are straightened with the aid of traditional means.
  • the profiled wires 12 comprise a rib with parallel flanks on each of two opposite sides, the surfaces of the crowns of the ribs being made slightly concave, while the profiled wires 13 comprise a swallow-tail groove on each of two opposite sides.
  • an odd number of profiled wires 12 and an even number of profiled wires 13 are joined together, as shown by the variant according to FIG. 4a and in the sequence which may be seen thereon, with profiled copper wires 14 and 15 each provided on one side with a swallow-tail groove, in such a manner that each rib on a profiled wire engages in a groove in the neighboring profiled wire.
  • the profiled wires joined in this way are now drawn together through a d e having a substantially rectangular aperture.
  • the ribs on the profiled wires 14 are pressed into the adjoining swallow-tail grooves, and are deformed in such a manner that finally they completely fill the said grooves. This ensures that there will be a permanent positive link between the profiled wires to form the desired final profile of the strip-shaped conductor 16 illustrated in cross-section in. FIG. 5.
  • profiled wires 17 and 18 are now produced in a similar manner to the profiled wires 12 and 13 according to the first variant in order to produce the conductor strip 16 (FIG. 5).
  • the profiled wires 17 comprise ribs of swallow-tail cross-section on two opposite sides, while the profiled wires 18 are provided on two opposite sides with grooves of rectangular cross-section each bounded by two ribs increasing in width from the foot of the rib to the crown thereof.
  • the plane surface 19 of the crown of the rib is at least substantially at right-angles to the oblique external flank 20 of the relevant rib.
  • an odd number of profiled wires 17 and an even number of profiled wires 18 are now also joined together in the case of this variant (FIG. 4b), in the sequence which may be seen therefrom, with two profiled copper wires 21, 22 whereof each comprises on one side a groove after the manner of the grooves in the profiled wires 18.
  • the profiled wires thus joined are now rolled together to form the coductor strip 16 of substantially rectangular final profile.
  • the ribs on the profiled wires 18, 21 and 22 are forced inwards until they engage flush behind the swallow-tail ribs on the neighboring profiled wires 17, and thus positively link the profiled wires tofit 4 gether to form the conductor strip 16, in a similar manner to the first variant.
  • step of shaping superconductor rods includes the steps of enclosing a cylindrical member of superconductive material in a gas-tight sheath of stabilizer metal in the absence of oxygen to establish a press block, pressing out said block into a continuous length, drawing and/or rolling said pressed out block to form a superconductive rod sheathed with the stabilizer metal, and cutting up said sheathed rod into lengths.
  • each rib portion which bounds a groove is a plane surface disposed at least substantially at a right-angle to an external oblique surface of said rib portion.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
US811478A 1968-04-05 1969-03-28 Process for the production of superconductive metallic conductors Expired - Lifetime US3618206A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH519768A CH482325A (de) 1968-04-05 1968-04-05 Verfahren zur Herstellung von supraleitenden metallischen Leitern

Publications (1)

Publication Number Publication Date
US3618206A true US3618206A (en) 1971-11-09

Family

ID=4289553

Family Applications (1)

Application Number Title Priority Date Filing Date
US811478A Expired - Lifetime US3618206A (en) 1968-04-05 1969-03-28 Process for the production of superconductive metallic conductors

Country Status (5)

Country Link
US (1) US3618206A (de)
CH (1) CH482325A (de)
DE (1) DE1903533A1 (de)
FR (1) FR2005608A1 (de)
GB (1) GB1215438A (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3811185A (en) * 1973-03-23 1974-05-21 Us Navy Method for enhancing v{11 ga thin film growth
US3837066A (en) * 1973-02-14 1974-09-24 Atomic Energy Commission Method of extruding aluminum coated nb-ti
US5475915A (en) * 1994-10-31 1995-12-19 Igc Advance Superconductors, Inc. Method for increasing extrusion yield in forming a superconducting rod
US5620798A (en) * 1995-05-17 1997-04-15 The Babcock & Wilcox Company Aluminum stabilized superconductor supported by aluminum alloy sheath
US20070251288A1 (en) * 2006-04-26 2007-11-01 Cole David J Method of manufacturing elongate members and workpiece therefor
US8637771B1 (en) * 2010-02-26 2014-01-28 Greald W Yankie Electromotive coil with improved conductor packing ratio

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2251854C3 (de) * 1972-10-23 1982-06-16 Freudenberger, Konrad, 8069 Aufham Scheibenförmige Magnetspule

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3837066A (en) * 1973-02-14 1974-09-24 Atomic Energy Commission Method of extruding aluminum coated nb-ti
US3811185A (en) * 1973-03-23 1974-05-21 Us Navy Method for enhancing v{11 ga thin film growth
US5475915A (en) * 1994-10-31 1995-12-19 Igc Advance Superconductors, Inc. Method for increasing extrusion yield in forming a superconducting rod
WO1996013867A1 (en) * 1994-10-31 1996-05-09 Igc Advance Superconductors, Inc. Method of extruding a superconducting rod
US5620798A (en) * 1995-05-17 1997-04-15 The Babcock & Wilcox Company Aluminum stabilized superconductor supported by aluminum alloy sheath
US20070251288A1 (en) * 2006-04-26 2007-11-01 Cole David J Method of manufacturing elongate members and workpiece therefor
US8637771B1 (en) * 2010-02-26 2014-01-28 Greald W Yankie Electromotive coil with improved conductor packing ratio

Also Published As

Publication number Publication date
CH482325A (de) 1969-11-30
GB1215438A (en) 1970-12-09
DE1903533A1 (de) 1970-02-05
FR2005608A1 (de) 1969-12-12

Similar Documents

Publication Publication Date Title
US3623221A (en) Method of fabricating a tubular superconductor assembly
US3699647A (en) Method of manufacturing long length composite superconductors
US3760092A (en) Superconducting composite
US4161062A (en) Method for producing hollow superconducting cables
US3618206A (en) Process for the production of superconductive metallic conductors
GB1247832A (en) Electrical conductors including superconductor material
US4554407A (en) Superconducting conductors having a stabilizing sheath brazed to its matrix and a process for making the same
GB1228113A (de)
JPS62170111A (ja) 多芯細線超電導線の製造方法
US5534219A (en) Method for producing multifilamentary niobium-tin superconductor
US5501746A (en) Process for preparing superconducting wire
EP0087691A2 (de) Verfahren zur Herstellung eines stabilisierten Supraleiters mit einer diffusionshemmenden Schicht
GB1286599A (en) Method of manufacturing hollow superconducting bodies
US3868768A (en) Method of producing a composite superconductor
US3783503A (en) Method of producing a composite conductor band for use in making a tubular superconductor
RU2122253C1 (ru) СПОСОБ ИЗГОТОВЛЕНИЯ КОМПОЗИТНОГО СВЕРХПРОВОДНИКА НА ОСНОВЕ СОЕДИНЕНИЯ Nb3Sn
US5228928A (en) Method of manufacturing Nb3 Sn superconducting wire
GB1387621A (en) Composite materials and a method of manufacture thereof
US5661113A (en) Near net shape processing of continuous lengths of superconducting wire
DE69609778T2 (de) Superleiter-Strangpressbolzen
JPS6329921B2 (de)
GB1247319A (en) Improvements in process for making superconductors
JPS5830682B2 (ja) チヨウデンドウホロ−コンダクタ−ノ セイゾウホウホウ
JPH05234626A (ja) 超電導線の接合方法
DE3803285A1 (de) Strompfad aus hochtemperatur-supraleitern