JPH03283321A - Manufacture of nb3al multicore superconductor - Google Patents
Manufacture of nb3al multicore superconductorInfo
- Publication number
- JPH03283321A JPH03283321A JP2085905A JP8590590A JPH03283321A JP H03283321 A JPH03283321 A JP H03283321A JP 2085905 A JP2085905 A JP 2085905A JP 8590590 A JP8590590 A JP 8590590A JP H03283321 A JPH03283321 A JP H03283321A
- Authority
- JP
- Japan
- Prior art keywords
- alloy
- solid solution
- copper
- heat treatment
- supersaturated solid
- 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.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 239000002887 superconductor Substances 0.000 title 1
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 15
- 239000006104 solid solution Substances 0.000 claims abstract description 14
- 238000010438 heat treatment Methods 0.000 claims abstract description 13
- 239000010949 copper Substances 0.000 claims abstract description 8
- 239000011159 matrix material Substances 0.000 claims abstract description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052802 copper Inorganic materials 0.000 claims abstract description 7
- 229910000881 Cu alloy Inorganic materials 0.000 claims abstract description 5
- 239000002131 composite material Substances 0.000 claims description 10
- 238000010894 electron beam technology Methods 0.000 claims description 4
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 230000009466 transformation Effects 0.000 abstract description 3
- 229910045601 alloy Inorganic materials 0.000 abstract description 2
- 239000000956 alloy Substances 0.000 abstract description 2
- 239000013078 crystal Substances 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 3
- 238000005491 wire drawing Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000009749 continuous casting Methods 0.000 description 2
- 235000015110 jellies Nutrition 0.000 description 2
- 239000008274 jelly Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910000714 At alloy Inorganic materials 0.000 description 1
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 229910001007 Tl alloy Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005324 grain boundary diffusion Methods 0.000 description 1
- 238000000886 hydrostatic extrusion Methods 0.000 description 1
- 239000011812 mixed powder Substances 0.000 description 1
Classifications
-
- 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
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は超電導線の製造方法に係わり、特に加工性に優
れ、従って長尺の線材を安定に製造することができる上
、高い臨界電流密度（Ｊｃ）を有するＮｂ、Ａｌ多芯超
電導線を製造する方法の改良に関する。[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a method for manufacturing superconducting wires, which has particularly excellent workability and can therefore stably manufacture long wires, as well as having a high critical current density. The present invention relates to an improvement in a method for manufacturing a Nb, Al multicore superconducting wire having (Jc).
［従来の技術］
化合物系の超電導材料は合金系の超電導材料に比較して
優れた超電導特性を有しており、特にＮｂ３＾Ｉは上部
臨界磁界が高く、かつ機械的性質に優れることが知られ
ているが、その生成温度が高い上、熱処理に長時間を要
するという問題がある。[Prior art] Compound-based superconducting materials have superior superconducting properties compared to alloy-based superconducting materials, and it is known that Nb3^I in particular has a high upper critical magnetic field and excellent mechanical properties. However, there are problems in that the generation temperature is high and the heat treatment takes a long time.
このような熱処理の条件を改善する方法として、ジェリ
ーロール法や粉末法が知られている。A jelly roll method and a powder method are known as methods for improving such heat treatment conditions.
ジェリーロール法は、ＮｂとＡｌのシートを積層して巻
回し、これを金属管中に収容して加工後熱処理を施す方
法であり、一方、粉末法はＮｂとＡｌの混合粉末を金属
管中に充填して加工後熱処理を施すものである。The jelly roll method is a method in which Nb and Al sheets are laminated and wound, then placed in a metal tube and subjected to heat treatment after processing.On the other hand, in the powder method, a mixed powder of Nb and Al is layered in a metal tube. After processing, heat treatment is performed.
上記の方法においては、ＮｂをＡｌ中に薄くまたは微細
に分散させ、粒界拡散を支配的に進行させることにより
熱処理条件を改善するものであるが、ＮｂとＡｌの拡散
距離を短くするため強加工を施す必要があり、このため
断線し易く、安定して長尺の線材を製造することが困難
であるという問題がある。また臨界電流密度（Ｊｃ）を
高めるために９００℃以上の高温度で熱処理を施す必要
があり、このためＮｂ等の高融点材料をマトリックスに
使用しなければならずＣｕマトリックス等を用いた場合
に比較して加工性が低下するという欠点があった。In the above method, the heat treatment conditions are improved by thinly or finely dispersing Nb in Al and allowing grain boundary diffusion to proceed dominantly, but in order to shorten the diffusion distance between Nb and Al, strong There is a problem in that it is necessary to perform processing, and therefore it is easy to break, making it difficult to stably manufacture long wire rods. In addition, in order to increase the critical current density (Jc), it is necessary to perform heat treatment at a high temperature of 900°C or higher, and for this reason, a high melting point material such as Nb must be used for the matrix, and when using a Cu matrix etc. There was a drawback that processability was lower than that.
［発明が解決しようとする課題］
本発明は上記の問題点を解決するためになされたもので
、加工性を改善することにより長尺の線材を安定に製造
し、かつ高い臨界電流密度（Ｊｃ）を有するＮｂ３Ａｌ
多芯超電導線を製造する方法を提供することをその目的
とする。[Problems to be Solved by the Invention] The present invention has been made to solve the above problems, and it is possible to stably manufacture long wire rods by improving workability, and to achieve high critical current density (Jc ) with Nb3Al
The object is to provide a method for manufacturing multicore superconducting wire.
［課題を解決するための手段］
上記目的を達成するために、本発明に係わるＮｂ３Ａｌ
多芯超電導線の製造方法は、銅または銅合金マトリック
ス中に、ＡＩを過飽和に固溶したＮｂ−Ａｌ合金ロッド
あるいはＮｂ−Ａｌ合金線の複数本を配置して複合体を
形成し、前記複合体に減面加工を施した後、７００〜９
００℃の温度で熱処理を施すものである。[Means for Solving the Problem] In order to achieve the above object, the Nb3Al according to the present invention
A method for manufacturing a multicore superconducting wire involves arranging a plurality of Nb-Al alloy rods or Nb-Al alloy wires in which AI is supersaturated as a solid solution in a copper or copper alloy matrix to form a composite. After surface reduction processing on the body, 700-9
Heat treatment is performed at a temperature of 00°C.
上記のＡｌを過飽和に固溶したＮｂ−Ａｌ合金ロッドあ
るいはＮｂ−Ａｌ合金線は、電子ビーム照射によりＮｂ
−Ａｔ合金を溶解後、急冷したものを使用することが好
ましい。このような例としては、電子ビーム溶解後、連
続鋳造する方法が好適する。The Nb-Al alloy rod or Nb-Al alloy wire containing the above-mentioned Al in a supersaturated solid solution is made of Nb by electron beam irradiation.
-It is preferable to use an At alloy that has been melted and then rapidly cooled. For such an example, a method of continuous casting after electron beam melting is suitable.
複合体は、銅または銅合金マトリックス中に、Ａｌを過
飽和に固溶したＮｂ−Ａｌ合金の複数本を配置して構成
されるが、多芯線を製造する場合には、銅または銅合金
管中にＡｌを過飽和に固溶したＮｂ−Ａｌ合金ロッドを
収容し、これに伸線加工を施した複合線の多数本を鋼管
中に収容して複合体を構成することが好適する。The composite is constructed by arranging multiple pieces of Nb-Al alloy in which Al is supersaturated as a solid solution in a copper or copper alloy matrix, but when producing a multifilamentary wire, it is necessary to It is preferable to construct a composite body by accommodating a Nb-Al alloy rod in which Al is supersaturated as a solid solution, and accommodating a large number of composite wires obtained by wire-drawing the rod in a steel pipe.
本発明の方法においては、Ａｌを過飽和に固溶したＮｂ
−Ａｌ合金を用いるため、７００〜９００℃の比較的低
温度で熱処理を施すことが可能になる。In the method of the present invention, Nb in which Al is supersaturated as a solid solution is used.
- Since an Al alloy is used, heat treatment can be performed at a relatively low temperature of 700 to 900°C.
［作用〕
本発明の方法においては、熱力学的に準安定なりｃｃ過
飽和固溶体であるＮｂ−Ａｌ合金が、加工後の比較的低
温度の熱処理により、変態析出する。このようにｂｃｃ
過飽和固溶体から相変態により析出したＮｂ３ ＡＩ相
は非常に微細な結晶組織を有しており、高い臨界電流密
度（Ｊｃ）を有する。またマトリックスに銅を用いてい
るため、加工性、特に伸線加工性はＮｂ−Ｔｌ合金と同
様に良好な結果が得られる。[Function] In the method of the present invention, the Nb-Al alloy, which is thermodynamically metastable and is a cc-supersaturated solid solution, is transformed and precipitated by heat treatment at a relatively low temperature after processing. bcc like this
The Nb3 AI phase precipitated from a supersaturated solid solution by phase transformation has a very fine crystal structure and a high critical current density (Jc). Furthermore, since copper is used in the matrix, good results in workability, particularly wire drawability, can be obtained similar to that of the Nb-Tl alloy.
［実施例］ 以下本発明の一実施例について説明する。[Example] An embodiment of the present invention will be described below.
２０ａｔ％のＡｌを配合したＮｂ−Ａｌ合金を、電子ビ
ーム照射により溶解して連続鋳造法により直径６■φ、
長さ５００− のＮｂ−Ａｌ合金ロッドを製造した。A Nb-Al alloy containing 20 at% Al was melted by electron beam irradiation, and a diameter of 6 φ was formed by continuous casting.
A Nb-Al alloy rod with a length of 500 mm was manufactured.
このＮｂ−Ａｌ合金ロッドは急冷によりｂｅｅ過飽和固
溶体となっている。This Nb-Al alloy rod becomes a bee supersaturated solid solution by rapid cooling.
上記のＮｂ−Ａｌ合金ロッドを外径８ｍ１ｌφ、内径６
．１■φの鋼管中に収容して、これに伸線加工を施し対
辺間距離２．７１の断面六角形の線材を製造した。この
線材の１８７本をその側面を当接して外径４９腸■φ、
内径Ａｌｍｍφの銅管内に収容収容して複合体を形成し
た。次いで、この複合体にに静水圧押出加工および伸線
加工を施して外径１．０■φの複合線を製造した。この
の複合線に８５０℃で７２時間の熱処理を施して多芯超
電導線を製造した。The above Nb-Al alloy rod has an outer diameter of 8mlφ and an inner diameter of 6mm.
．． It was housed in a 1 φ steel pipe and subjected to wire drawing to produce a wire rod having a hexagonal cross section with a distance between opposite sides of 2.71 mm. 187 pieces of this wire are brought into contact with their sides, and the outer diameter is 49 mm,
A composite body was formed by housing it in a copper tube with an inner diameter of Al mmφ. Next, this composite was subjected to hydrostatic extrusion and wire drawing to produce a composite wire with an outer diameter of 1.0 mm. This composite wire was heat treated at 850° C. for 72 hours to produce a multicore superconducting wire.
このようにして得られた多芯超電導線の臨界電流密度（
Ｊｃ）は４．２に、 ＋５Ｔで１００ＯＯＡ／ ｃシ、
また臨界温度（Ｔｃ）は１５．５にの値を示した。The critical current density of the multicore superconducting wire obtained in this way (
Jc) is 4.2, 100OOA/c at +5T,
Moreover, the critical temperature (Tc) showed a value of 15.5.
Ｃ発明の効果］
以上述べたように、本発明によれば、多フイラメント構
造の長尺の線材を安定に製造することができるとともに
、高い臨界電流密度（」Ｃ）を有するＮｂａ Ａｌ多芯
超電多芯超電導線を製造することが可能になる。Effects of the invention C] As described above, according to the present invention, it is possible to stably produce a long wire rod with a multifilament structure, and also to produce an Nba Al multifilament super wire rod having a high critical current density ('C). It becomes possible to manufacture multicore superconducting wire.
疑咲シMisakishi
Claims (2)
に固溶したＮｂ−Ａｌ合金ロッドあるいはＮｂ−Ａｌ合
金線の複数本を配置して複合体を形成し、前記複合体に
減面加工を施した後、７００〜９００℃の温度で熱処理
を施すことを特徴とするＮｂ＿３Ａｌ多芯超電導線の製
造方法。(1) A composite is formed by arranging a plurality of Nb-Al alloy rods or Nb-Al alloy wires containing a supersaturated solid solution of Al in a copper or copper alloy matrix, and the composite is subjected to area reduction processing. A method for producing a Nb_3Al multicore superconducting wire, which comprises performing heat treatment at a temperature of 700 to 900° C.
ーム溶解後、急冷されてなる請求項１記載のＮｂ＿３Ａ
ｌ多芯超電導線の製造方法。(2) The Nb_3A according to claim 1, wherein the Nb-Al alloy containing Al in a supersaturated solid solution is rapidly cooled after electron beam melting.
l A method for manufacturing multicore superconducting wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2085905A JPH03283321A (en) | 1990-03-30 | 1990-03-30 | Manufacture of nb3al multicore superconductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2085905A JPH03283321A (en) | 1990-03-30 | 1990-03-30 | Manufacture of nb3al multicore superconductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03283321A true JPH03283321A (en) | 1991-12-13 |
Family
ID=13871858
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2085905A Pending JPH03283321A (en) | 1990-03-30 | 1990-03-30 | Manufacture of nb3al multicore superconductor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03283321A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5620532A (en) * | 1992-11-30 | 1997-04-15 | Hitachi, Ltd. | Method for manufacturing Nb3 Al group superconductor |
-
1990
- 1990-03-30 JP JP2085905A patent/JPH03283321A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5620532A (en) * | 1992-11-30 | 1997-04-15 | Hitachi, Ltd. | Method for manufacturing Nb3 Al group superconductor |
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