JPH05135636A - Manufacture of compound superconductive wire - Google Patents
Manufacture of compound superconductive wireInfo
- Publication number
- JPH05135636A JPH05135636A JP3295593A JP29559391A JPH05135636A JP H05135636 A JPH05135636 A JP H05135636A JP 3295593 A JP3295593 A JP 3295593A JP 29559391 A JP29559391 A JP 29559391A JP H05135636 A JPH05135636 A JP H05135636A
- Authority
- JP
- Japan
- Prior art keywords
- heat treatment
- wire
- temperature
- high magnetic
- specified configuration
- 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.)
- Granted
Links
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
Landscapes
- Wire Processing (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、例えば高磁界用超電
導材料として、核融合その他に用いることのできる超電
導マグネット用などの超電導線の製造方法に関するもの
である。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a superconducting wire for a superconducting magnet which can be used for nuclear fusion or the like as a superconducting material for high magnetic fields.
【０００２】[0002]
【従来の技術】Ｎｂ3 Ｘ系超電導線の製造方法は、従来
より、その性質によってさまざまなものが検討されてい
る。その中で、Ｎｂ3 Ａｌ系超電導材料は、高磁界の臨
界電流特性および耐ひずみ特性が良好であり、有望視さ
れている。しかしながら、Ｎｂ 3 Ａｌ系超電導材料は、
１６００℃以上の高温でのみ安定に存在し、高温かつ短
時間の熱処理によってしか超電導材料を得ることができ
なかった。2. Description of the Related Art Nb3The X-type superconducting wire has been manufactured by the conventional method.
Therefore, various things have been studied depending on their nature.
It Among them, Nb3The Al-based superconducting material has a high magnetic field.
Good field current characteristics and strain resistance characteristics
Has been. However, Nb 3Al-based superconducting material is
Stable only at high temperatures above 1600 ° C, high temperature and short
Superconducting material can be obtained only by heat treatment for a long time
There wasn't.
【０００３】これに対し、熱処理の際の拡散距離が極め
て短いときには、局所的にＡｌが欠乏した状態からＮｂ
3 Ａｌ系超電導材料が生成することが判明し、この方法
に従う粉末冶金（ＰＭ）法、複合加工法、およびジェリ
ーロール法などの製造方法が開発された。なかでも、ジ
ェリーロール法と呼ばれる製造方法は、安定化および量
産化の点から実用化に一番近い方法として期待されてい
る。On the other hand, when the diffusion distance at the time of heat treatment is extremely short, Nb is changed from the state where Al is locally depleted.
3 Al superconducting material is found to produce a powder metallurgy (PM) process in accordance with this method, composite working method, and a manufacturing method such as jelly roll method has been developed. Above all, the manufacturing method called the jelly roll method is expected to be the closest to practical use in terms of stabilization and mass production.
【０００４】[0004]
【発明が解決しようとする課題】以上のように、Ｎｂ3
Ｘ超電導線は、Ｎｂと、ＸまたはＸを含む合金とを複合
加工することにより製造されているが、化合物自体が脆
弱なため、ひずみに弱く、ＮｂＴｉ等のように線材とし
て自由に加工することができず、巻線等に加工すること
が困難であった。このため、化合物を生成させるための
熱処理は、超電導コイルなどの所望の形状に加工した状
態で行なわれることが多い。このように加工後熱処理し
ようとすると加工後の形態が非常に大きな体積を有し、
このため大きな熱容量を有するので、高温で短時間の熱
処理を現実的に行なうことは不可能であった。As described above, Nb 3
The X superconducting wire is manufactured by composite processing of Nb and X or an alloy containing X. However, since the compound itself is fragile, it is weak against strain and can be freely processed as a wire rod such as NbTi. However, it was difficult to process it into a winding wire. Therefore, the heat treatment for producing the compound is often performed in a state where the superconducting coil or the like is processed into a desired shape. In this way, when trying to heat-treat after processing, the shape after processing has a very large volume,
Therefore, since it has a large heat capacity, it is impossible to practically perform heat treatment at high temperature for a short time.
【０００５】また、超電導線として使用するには、安定
化のためマトリックスとして銅または銅合金を用いるこ
とが必要であるが、銅の融点は１０８３℃であることか
ら、それ以下の温度の熱処理でなければならない。した
がってジェリーロール法において、現実的な熱処理は８
００〜８５０℃で１〜１０時間で行なわれている。Further, in order to use it as a superconducting wire, it is necessary to use copper or a copper alloy as a matrix for stabilization, but since the melting point of copper is 1083 ° C., heat treatment at a temperature below that There must be. Therefore, in the jelly roll method, realistic heat treatment is 8
It is carried out at 00 to 850 ° C. for 1 to 10 hours.
【０００６】このような、ジェリーロール法で得られる
超電導材料は、従来高磁界材料として使われている通常
のブロンズ法のＮｂ3 Ｓｎに比べて１２Ｔ前後以下の磁
界では優れた特性を有しているものの、より高い磁界で
の特性が十分得られておらず、臨界磁界が３０Ｔ前後あ
るとされているのに対して、２０Ｔ程度となっている。Such a superconducting material obtained by the jelly roll method has excellent characteristics in a magnetic field of about 12 T or less as compared with Nb 3 Sn of the usual bronze method conventionally used as a high magnetic field material. However, the characteristics in a higher magnetic field are not sufficiently obtained, and the critical magnetic field is said to be around 30T, whereas it is about 20T.
【０００７】この発明の目的は、高磁界特性が良好なＮ
ｂ系化合物超電導材料の製造方法を提供することにあ
る。The object of the present invention is to provide N with excellent high magnetic field characteristics.
It is to provide a method for producing a b-based compound superconducting material.
【０００８】[0008]
【課題を解決するための手段】この発明の製造方法は、
Ｎｂ系化合物超電導線の原材料を複合化した線材に対し
第１の熱処理を施す工程と、第１の熱処理後に、線材を
所定の形状に加工する工程と、所定の形状の線材に対
し、第１の熱処理より低温でかつ長時間の第２の熱処理
を施す工程とを備えていることを特徴としている。The manufacturing method of the present invention comprises:
A step of performing a first heat treatment on a wire material in which a raw material of an Nb-based compound superconducting wire is composited, a step of processing the wire material into a predetermined shape after the first heat treatment, and And a step of performing a second heat treatment at a lower temperature for a longer time than the heat treatment of.
【０００９】この発明において、Ｎｂ系化合物超電導線
を形成する超電導材料は、純Ｎｂ又はＮｂ合金と、純Ｘ
又はＸ合金（ＸはＮｂと超電導性を示す化合物を作る元
素であり、Ａｌ、Ｓｎ、およびＧｅなどである）を複合
して形成される、Ｎｂ3 ＡｌまたはＮｂ3 （Ｘ−Ｙ）系
の化合物超電導材料が用いられる。ここで、ＹはＮｂ合
金またはＸ合金を構成する元素であり、Ａｌ、Ｇｅ、Ｓ
ｎ、Ｔｉ、Ｓｉ、Ｈｆ、Ｔａ、Ｚｒ、Ｍｇ、およびＢｅ
などである。In the present invention, the superconducting material forming the Nb-based compound superconducting wire is pure Nb or Nb alloy and pure X.
Alternatively, a Nb 3 Al or Nb 3 (X-Y) -based alloy formed by compounding an X alloy (X is an element that forms a compound having superconductivity with Nb and is Al, Sn, Ge, or the like) A compound superconducting material is used. Here, Y is an element forming an Nb alloy or an X alloy, and Al, Ge, S
n, Ti, Si, Hf, Ta, Zr, Mg, and Be
And so on.
【００１０】また、この発明でＮｂ系化合物超電導線の
マトリックスとしては、銅または銅合金が好ましい。In the present invention, copper or copper alloy is preferable as the matrix of the Nb compound superconducting wire.
【００１１】この発明において、第１の熱処理の処理温
度は８５０℃以上１０５０℃以下であることが好まし
く、また第１の熱処理の熱処理時間は１時間未満である
ことが好ましい。In the present invention, the treatment temperature of the first heat treatment is preferably 850 ° C. or higher and 1050 ° C. or lower, and the heat treatment time of the first heat treatment is preferably less than 1 hour.
【００１２】またこの発明において、第２の熱処理の熱
処理温度は８５０℃未満であることが好ましく、第２の
熱処理の熱処理時間は１時間以上であることが好まし
い。In the present invention, the heat treatment temperature of the second heat treatment is preferably lower than 850 ° C., and the heat treatment time of the second heat treatment is preferably 1 hour or more.
【００１３】第１の熱処理の熱処理温度が１０５０℃以
下が好ましいとしているのは、マトリックスの銅の融点
が１０８３℃であるためであり、８５０℃以上が好まし
いとしているのはこれよりに低い温度になると熱処理時
間が長くなりすぎる場合があるからである。The heat treatment temperature of the first heat treatment is preferably 1050 ° C. or lower because the melting point of the matrix copper is 1083 ° C., and 850 ° C. or higher is preferable at a lower temperature. If so, the heat treatment time may be too long.
【００１４】また、第２の熱処理が８５０℃未満１時間
以上が好ましいとしてるのは、体積の大きな対象物に対
し最適な熱処理が安定して行なえるのは１時間以上であ
り、１時間以上での熱処理が最適な特性であるのが８５
０℃未満だからである。Further, the second heat treatment is preferably performed at less than 850 ° C. for 1 hour or more, and the optimum heat treatment for a large volume object can be stably performed for 1 hour or more, and for 1 hour or more. 85 is the optimum property for heat treatment in
This is because it is less than 0 ° C.
【００１５】[0015]
【作用】Ｎｂ3 Ａｌ等は高温でかつ短時間の熱処理によ
り高磁界の特性が向上するが、熱処理後の巻線ではひず
みにより特性が劣化する。このため、巻線後に熱処理を
行なう必要がある。しかしながら、巻線後の熱処理では
少量の処理は可能であるが、現実の問題として体積の大
きなものを高温でかつ短時間に熱処理することは不可能
である。The high magnetic field characteristics of Nb 3 Al and the like are improved by heat treatment at high temperature for a short time, but the characteristics are deteriorated by strain in the winding after the heat treatment. Therefore, it is necessary to perform heat treatment after winding. However, although a small amount of heat treatment is possible after winding, as a practical problem, it is impossible to heat-treat a material having a large volume at a high temperature in a short time.
【００１６】この発明では、所定の形状に加工する前に
第１の熱処理を高温短時間で行なうことにより、高磁界
特性の優れたＮｂ3 Ａｌなどが生成しやすくなった状態
で巻線している。第１の熱処理後コイル巻など所定の形
状に加工した後に低温長時間の第２の熱処理を行ない、
特性を向上させている。このため、巻線などの加工によ
る特性の劣化を最小限に抑えることができる。According to the present invention, the first heat treatment is performed at a high temperature for a short time before processing into a predetermined shape, so that Nb 3 Al having an excellent high magnetic field characteristic is easily generated and wound. There is. After the first heat treatment, the second heat treatment at a low temperature and a long time is performed after processing into a predetermined shape such as coil winding,
The characteristics are improved. Therefore, it is possible to minimize the deterioration of the characteristics due to the processing of the winding wire or the like.
【００１７】[0017]
【発明の効果】この発明に従えば、第１の熱処理により
高磁界特性の優れたＮｂ系化合物超電導材料が生成しや
すいようにしておき、所定の形状に加工した後に、より
低温でかつ長時間の第２の熱処理を施すことにより、特
性を向上させながら、加工による特性の劣化を最小限に
抑えることができる。このため、この発明に従えば、高
磁界特性が良好なＮｂ系化合物超電導材料を得ることが
できる。According to the present invention, the Nb-based compound superconducting material excellent in high magnetic field characteristics is easily produced by the first heat treatment, and after being processed into a predetermined shape, it is processed at a lower temperature for a long time. By performing the second heat treatment described above, it is possible to minimize the deterioration of the characteristics due to processing while improving the characteristics. Therefore, according to the present invention, an Nb-based compound superconducting material having excellent high magnetic field characteristics can be obtained.
【００１８】[0018]
【実施例】長さ８００ｍｍ厚さ０．２ｍｍのＮｂ板と、
長さ６００ｍｍ厚さ０．０６ｍｍのＡｌ箔を重ね合わ
せ、直径５ｍｍの銅棒を中心にまずＮｂ板のみを３回巻
いた後、Ａｌ箔を重ね、６００ｍｍ分巻き合わせた後、
残ったＮｂだけを３回巻きし、これを外径１８ｍｍ内径
１６ｍｍの銅管に挿入した。これを線引き加工して線材
化し９１本束ね合わせ、これをさらに外径１８ｍｍ内径
１６ｍｍの銅管に挿入した。この複合材を直径０．８ｍ
ｍまで線引き加工した。Example: A Nb plate having a length of 800 mm and a thickness of 0.2 mm,
After laminating Al foils having a length of 600 mm and a thickness of 0.06 mm, first winding only the Nb plate 3 times around a copper rod having a diameter of 5 mm, laminating the Al foils, and winding for 600 mm,
Only the remaining Nb was wound three times, and this was inserted into a copper tube having an outer diameter of 18 mm and an inner diameter of 16 mm. This was subjected to wire drawing processing to form a wire rod, and 91 wires were bundled and further inserted into a copper tube having an outer diameter of 18 mm and an inner diameter of 16 mm. This composite is 0.8m in diameter
It was drawn to m.
【００１９】このようにして得られた線材を試験のため
直径８０ｍｍのボビンに５ターン巻いた。なお、熱処理
は以下のように、この巻線の前後の両方あるいはいずれ
か１方において行なった。The wire thus obtained was wound on a bobbin having a diameter of 80 mm for 5 turns for testing. The heat treatment was performed before and / or after the winding as described below.
【００２０】 巻線後８００℃で５時間熱処理した。 ９００℃で１５分間熱処理したものを巻線した。After winding, heat treatment was performed at 800 ° C. for 5 hours. What was heat-treated at 900 ° C. for 15 minutes was wound.
【００２１】 巻線後９００℃で１５分間熱処理し
た。 １０００℃で５分間熱処理した後、７５０℃で１０
０時間熱処理したのものを巻線した。After winding, heat treatment was performed at 900 ° C. for 15 minutes. Heat treatment at 1000 ° C for 5 minutes, then at 750 ° C for 10 minutes
What was heat-treated for 0 hours was wound.
【００２２】 １０００℃で５分間熱処理した後、巻
線したものを７５０℃で１００時間熱処理した。After heat treatment at 1000 ° C. for 5 minutes, the wound one was heat treated at 750 ° C. for 100 hours.
【００２３】巻線後９５０℃で５分間熱処理した後、
７５０℃で１００時間熱処理した。 はこの発明にしたがう実施例であり、〜および
は比較例である。なお、およびにおいては、巻線後
に熱処理しており、５ターンコイルでは所定の熱処理が
可能であったが、現実のコイルに適用した場合には昇温
および降温時の熱履歴を実現することができなかった。After heat treatment at 950 ° C. for 5 minutes after winding,
Heat treatment was performed at 750 ° C. for 100 hours. Are Examples according to the present invention, and are Comparative Examples. In addition, in and, the heat treatment was performed after the winding, and the predetermined heat treatment was possible with the 5-turn coil. However, when applied to an actual coil, it is possible to realize a heat history during temperature increase and decrease. could not.
【００２４】上記のようにして作製した〜のボビン
に巻いた各試料の超電導部の臨界電流密度（Ｊｃ）（８
Ｔ，１２Ｔ，１５Ｔ）と臨界磁界（推定）を表１に示
す。The critical current densities (Jc) (8) of the superconducting parts of the respective samples wound on the bobbins 1 to 8 produced as described above
T, 12T, 15T) and the critical magnetic field (estimation) are shown in Table 1.
【００２５】[0025]
【表１】 [Table 1]
【００２６】、およびの比較から明らかなよう
に、より高温でより短時間の熱処理を施すことにより、
高磁界の特性を向上させることができる。またおよび
から明らかなように、熱処理後に巻線を行なうことに
より、ひずみが発生し、特性が劣化する。この発明に従
い第１の熱処理をコイル巻前に高温短時間で行ない、そ
の後低温長時間で第２の熱処理を行なうことによって、
巻線による特性の劣化を最小限に抑えながら特性を向上
させることができる。As is clear from the comparison between and, by performing heat treatment at a higher temperature for a shorter time,
The characteristics of a high magnetic field can be improved. Further, as is clear from and, when the winding is performed after the heat treatment, distortion occurs and the characteristics deteriorate. According to the present invention, the first heat treatment is performed at a high temperature for a short time before coil winding, and then the second heat treatment is performed at a low temperature for a long time,
It is possible to improve the characteristics while minimizing the deterioration of the characteristics due to the winding.
Claims (1)
あって、 Ｎｂ系化合物超電導線の原材料を複合化した線材に対し
第１の熱処理を施す工程と、 前記第１の熱処理後に、前記線材を所定の形状に加工す
る工程と、 前記所定の形状の線材に対し、前記第１の熱処理より低
温でかつ長時間の第２の熱処理を施す工程とを備える、
化合物系超電導線の製造方法。1. A method for producing an Nb-based compound superconducting wire, comprising: a step of performing a first heat treatment on a wire material obtained by compounding raw materials of an Nb-based compound superconducting wire; and the wire material after the first heat treatment. And a step of subjecting the wire having the predetermined shape to a second heat treatment at a temperature lower than that of the first heat treatment and for a long time.
A method for producing a compound superconducting wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3295593A JP2861545B2 (en) | 1991-11-12 | 1991-11-12 | Method for producing Nb-based compound superconducting coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3295593A JP2861545B2 (en) | 1991-11-12 | 1991-11-12 | Method for producing Nb-based compound superconducting coil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05135636A true JPH05135636A (en) | 1993-06-01 |
| JP2861545B2 JP2861545B2 (en) | 1999-02-24 |
Family
ID=17822639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3295593A Expired - Lifetime JP2861545B2 (en) | 1991-11-12 | 1991-11-12 | Method for producing Nb-based compound superconducting coil |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2861545B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5504984A (en) * | 1993-12-13 | 1996-04-09 | Sumitomo Electric Industries, Ltd. | Methods of manufacturing Nb3 Al superconducting wire and coil |
| WO2005087967A1 (en) * | 2004-03-15 | 2005-09-22 | Gennadij Alexandrovich Markov | Method for transiting a metal conductor into a superconducting state |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01292709A (en) * | 1988-05-19 | 1989-11-27 | Showa Electric Wire & Cable Co Ltd | Manufacture of nb3al superconductor member |
| JPH0251807A (en) * | 1988-08-12 | 1990-02-21 | Natl Res Inst For Metals | Manufacture of nb3al superconducting wire rod with extremely fine multiplex structure |
-
1991
- 1991-11-12 JP JP3295593A patent/JP2861545B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01292709A (en) * | 1988-05-19 | 1989-11-27 | Showa Electric Wire & Cable Co Ltd | Manufacture of nb3al superconductor member |
| JPH0251807A (en) * | 1988-08-12 | 1990-02-21 | Natl Res Inst For Metals | Manufacture of nb3al superconducting wire rod with extremely fine multiplex structure |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5504984A (en) * | 1993-12-13 | 1996-04-09 | Sumitomo Electric Industries, Ltd. | Methods of manufacturing Nb3 Al superconducting wire and coil |
| WO2005087967A1 (en) * | 2004-03-15 | 2005-09-22 | Gennadij Alexandrovich Markov | Method for transiting a metal conductor into a superconducting state |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2861545B2 (en) | 1999-02-24 |
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