JPH0648606B2 - Manufacturing method of Sn superconducting wire of Nb under 3 by internal diffusion method - Google Patents
Manufacturing method of Sn superconducting wire of Nb under 3 by internal diffusion methodInfo
- Publication number
- JPH0648606B2 JPH0648606B2 JP60067492A JP6749285A JPH0648606B2 JP H0648606 B2 JPH0648606 B2 JP H0648606B2 JP 60067492 A JP60067492 A JP 60067492A JP 6749285 A JP6749285 A JP 6749285A JP H0648606 B2 JPH0648606 B2 JP H0648606B2
- Authority
- JP
- Japan
- Prior art keywords
- superconducting wire
- heat treatment
- wire
- manufacturing
- alloy
- 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
Links
- 238000009792 diffusion process Methods 0.000 title claims description 8
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 15
- 239000002131 composite material Substances 0.000 claims description 11
- 229910000881 Cu alloy Inorganic materials 0.000 claims description 7
- 239000011159 matrix material Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 229910001128 Sn alloy Inorganic materials 0.000 claims description 4
- 238000002844 melting Methods 0.000 claims description 2
- 230000008018 melting Effects 0.000 claims description 2
- 238000000465 moulding Methods 0.000 claims description 2
- 238000011946 reduction process Methods 0.000 claims description 2
- 238000005491 wire drawing Methods 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010622 cold drawing Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000462 isostatic pressing Methods 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000005482 strain hardening Methods 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
Landscapes
- Superconductors And Manufacturing Methods Therefor (AREA)
- Manufacturing Of Electric Cables (AREA)
Description
【発明の詳細な説明】 ［発明の技術分野］ 本発明はＮｂ３Ｓｎ超電導線の製造方法、詳しくは内部
拡散型の多芯構造のＮｂ３Ｓｎ超電導線の製造方法に関
する。Description: TECHNICAL FIELD OF THE INVENTION The present invention relates to a method for manufacturing an Nb 3 Sn superconducting wire, and more particularly to an internal diffusion type multi-core structure Nb 3 Sn superconducting wire.
［発明の技術的背景］ 従来、多芯構造のＮｂ３Ｓｎ超電導線はパイプ構造法、
ブロンズ法あるいは内部拡散法等の製法により製造され
ている。これ等の製法によって製造される超電導線は超
電導特性の向上の点から、例えばパルス導体用等におい
て、特に超電導フィラメントの細線化が必要である。[Technical Background of the Invention] Conventionally, a Nb 3 Sn superconducting wire having a multi-core structure has a pipe structure method,
It is manufactured by a manufacturing method such as a bronze method or an internal diffusion method. From the viewpoint of improving superconducting properties, the superconducting wire manufactured by these manufacturing methods requires thinning of the superconducting filament particularly for pulse conductors and the like.
Ｎｂ３Ｓｎ生成の熱処理前のＮｂフィラメントの細線化
を図るには強加工を受けたＮｂフィラメントを再結晶せ
しめ加工性を改善することが当然考えられる。In order to thin the Nb filament before the heat treatment for Nb 3 Sn formation, it is naturally considered that the Nb filament subjected to the strong working is recrystallized to improve the workability.
［背景技術の問題点］ しかしながら、上記の製法においては加工中の複合体中
にＮｂ及びＳｎが存在するため、Ｎｂフィラメントの再
結晶化熱処理時にＮｂ３Ｓｎが生成し、この化合物は脆
弱であるため、実質的にＮｂフィラメントの加工性を向
上させることができないという難点がある。[Problems of the Related Art] However, in the above method the presence of Nb and Sn in the complex during processing, Nb 3 Sn is generated during recrystallization heat treatment Nb filaments, the compound is vulnerable Therefore, there is a drawback that the workability of the Nb filament cannot be substantially improved.
［発明の目的］ 本発明は上記の難点を解消するためになされたもので、
内部拡散法による多芯構造のＮｂ３Ｓｎ超電導線の製造
方法において、Ｎｂフィラメントの細線化、即ち結果と
してＮｂ３Ｓｎフィラメントの細線化を可能にした製造
方法を提供することをその目的とする。[Object of the Invention] The present invention has been made in order to solve the above-mentioned difficulties.
It is an object of the present invention to provide a method for manufacturing a Nb 3 Sn superconducting wire having a multi-core structure by the internal diffusion method, which enables thinning of Nb filaments, that is, as a result, thinning of Nb 3 Sn filaments.
［発明の概要］ 本発明はＣｕ又はＣｕ合金マトリックス中に多数本のＮ
ｂ素線を配置し、断面略正六角形に成形した複合線Ａの
多数本と、Ｓｎ又はＳｎ合金線あるいはこれにＣｕ又は
Ｃｕ合金を被覆した複合線ＢをＣｕ又はＣｕ合金管中に
組込み、これに断面減少加工を施した後、Ｎｂ３Ｓｎ生
成の熱処理を施してＮｂ３Ｓｎ超電導線を製造する方法
において、前記成形後の複合線Ａは組込み前に８００℃
以上でマトリックス材の融点以下の熱処理が施されてい
ることを特徴としており、この熱処理により０．０８μ
ｍφ以下のフィラメントの生成が可能となる。SUMMARY OF THE INVENTION The present invention relates to a large number of N in a Cu or Cu alloy matrix.
Incorporating a large number of composite wires A in which b wires are arranged and formed into a substantially regular hexagonal cross section, and Sn or Sn alloy wires or composite wires B coated with Cu or Cu alloy into a Cu or Cu alloy tube, In the method of manufacturing a Nb 3 Sn superconducting wire by subjecting this to a cross-section reduction process and then subjecting it to a heat treatment for Nb 3 Sn generation, the composite wire A after the molding has a temperature of 800 ° C before being incorporated.
As described above, the heat treatment is performed at a temperature equal to or lower than the melting point of the matrix material.
It is possible to generate filaments of mφ or less.
本発明においては、Ｓｎ又はＳｎ合金と複合化する前の
Ｎｂ素線を含む複合線Ａに熱処理を施すことにより、Ｎ
ｂフィラメントの加工性が改善されるが、その熱処理時
間は０．５〜５時間の範囲で適宜選択され、特に９２０
〜９８０℃で１〜３時間の条件が好適である。In the present invention, the composite wire A containing the Nb element wire before being compounded with Sn or the Sn alloy is subjected to heat treatment to obtain N
Although the workability of the b filament is improved, the heat treatment time thereof is appropriately selected within the range of 0.5 to 5 hours, and particularly 920
The conditions of ˜980 ° C. and 1 to 3 hours are suitable.
［発明の実施例］ 以下本発明の一実施例について説明する。[Embodiment of the Invention] An embodiment of the present invention will be described below.
外径３１．６mmφのＮｂロッドの外周に厚さ約５mmのＣ
ｕパイプを被覆した後、これに冷間加工を施して断面正
六角形状に成形した。この９２５本を外径８００mmφ、
厚さ４．５mmのＣｕパイプ中に組込み、その両端を密封
した後、静水圧押出加工及び冷間伸線加工を施して断面
正六角形状に成形した。さらにこの３０１本を外径４９
mmφ、厚さ４mmのＣｕパイプ中に組込み上記と同様の加
工を施したところ、外径９．５mmφで断線し伸線加工が
不可能となった。この断線前の外径１０．０mmφの複合
線に９５０℃×２時間及び７８０℃×２時間の熱処理を
それぞれ施して、さらに冷間伸線加工を施したところ、
７８０℃の熱処理を施したものは外径約５mmφで断線を
生じたが９５０℃で熱処理を施したものは対辺間距離
２．７mmの断面正六角形状に成形することができた。こ
のＣｕマトリックス中に多数のＮｂフィラメントが配置
された複合線の１２本を同形状のＳｎ線７本の周囲に配
置し、厚さ１．４mmのＣｕパイプ中に組込み冷間加工を
施した結果、中間焼鈍を必要とせずに外径０．３mmφ、
Ｎｂフィラメント数３，３４１，１００本、フィラメン
ト径０．０７５μｍφの多芯線を得た。この多芯線にＳ
ｎの拡散熱処理を施し、次いで７２５℃×１４４時間の
Ｎｂ３Ｓｎ生成の熱処理を施した超電導線の臨界電流密
度は１５Ｔで１５７Ａ／mm2、１３Ｔで２６０Ａ／mm2で
あった。C of about 5 mm in thickness on the outer circumference of Nb rod with outer diameter of 31.6 mmφ
After coating the u pipe, it was cold worked to form a regular hexagonal cross section. These 925 pieces have an outer diameter of 800 mmφ,
After being assembled in a 4.5 mm-thick Cu pipe and sealing both ends thereof, isostatic pressing and cold drawing were performed to form a regular hexagonal cross section. Furthermore, this 301 is the outer diameter 49
When it was incorporated into a Cu pipe of mmφ and a thickness of 4 mm and subjected to the same processing as above, the outer diameter was cut off at 9.5 mmφ and wire drawing became impossible. The composite wire having an outer diameter of 10.0 mmφ before the breakage was subjected to heat treatment at 950 ° C. × 2 hours and 780 ° C. × 2 hours, respectively, and further subjected to cold wire drawing.
The one subjected to the heat treatment at 780 ° C. had a disconnection with an outer diameter of about 5 mmφ, while the one subjected to the heat treatment at 950 ° C. could be formed into a regular hexagonal cross section with a distance between opposite sides of 2.7 mm. Twelve composite wires in which a large number of Nb filaments are arranged in this Cu matrix are arranged around seven Sn wires having the same shape, and the result is obtained by incorporating them into a 1.4 mm thick Cu pipe and performing cold working. , Outer diameter 0.3mmφ without the need for intermediate annealing,
A multifilamentary wire having 3,341,100 Nb filaments and a filament diameter of 0.075 μmφ was obtained. S for this multi-core wire
subjected to diffusion heat treatment of n, the critical current density is then 725 ° C. × 144 hours of Nb 3 superconducting wire was subjected to heat treatment of Sn generation was 260A / mm 2 at 157A / mm 2, 13T at 15T.
［発明の効果］ 以上述べたように、本発明によればＳｎ又はＳｎ合金と
複合化する前のＣｕ又はＣｕ合金マトリックス中に多数
のＮｂフィラメントが配置された複合線に所定の熱処理
を施すことにより、内部拡散法において、極めてフィラ
メント数が大でかつそのフィラメント径の小さな極細多
芯構造のＮｂ３Ｓｎに超電導線を得ることができ、特に
ＡＣロスを低減させることが必要なパルス導体に好適し
ている。[Effects of the Invention] As described above, according to the present invention, a predetermined heat treatment is applied to a composite wire in which a large number of Nb filaments are arranged in Cu or a Cu alloy matrix before being composited with Sn or a Sn alloy. As a result, in the internal diffusion method, it is possible to obtain a superconducting wire in Nb 3 Sn having an extremely thin multifilament structure having an extremely large number of filaments and a small filament diameter. Are suitable.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 青木 伸夫 神奈川県川崎市川崎区小田栄２丁目１番１ 号 昭和電線電纜株式会社内 (72)発明者 熊野 智幸 神奈川県川崎市川崎区小田栄２丁目１番１ 号 昭和電線電纜株式会社内 (56)参考文献 特開 昭49−114389（ＪＰ，Ａ) 特開 昭56−152106（ＪＰ，Ａ) 特開 昭59−98412（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Nobuo Aoki No. 1-1 Oda Sakae, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture, Showa Electric Wire & Cable Co., Ltd. 1-1-1, Showa Densen Denki Co., Ltd. (56) Reference JP-A-49-114389 (JP, A) JP-A-56-152106 (JP, A) JP-A-59-98412 (JP, A)
Claims (2)
のＮｂ素線を配置し、断面略正六角形に成形した複合線
Ａの多数本と、Ｓｎ又はＳｎ合金線あるいはこれにＣｕ
又はＣｕ合金を被覆した複合線ＢをＣｕ又はＣｕ合金管
中に組込み、これに断面減少加工を施した後、Ｎｂ３Ｓ
ｎ生成の熱処理を施してＮｂ３Ｓｎ超電導線を製造する
方法において、前記成形後の複合線Ａは組込み前に８０
０℃以上でマトリックス材の融点以下の熱処理が施され
ていることを特徴とする内部拡散法によるＮｂ３Ｓｎ超
電導線の製造方法。1. A large number of composite wires A formed by arranging a large number of Nb element wires in a Cu or Cu alloy matrix and forming them into a substantially regular hexagonal cross section, and Sn or Sn alloy wires or Cu.
Alternatively, the composite wire B coated with a Cu alloy is incorporated into a Cu or Cu alloy tube, and after subjecting this to a cross-section reduction process, Nb 3 S
In the method of producing a Nb 3 Sn superconducting wire by subjecting it to a heat treatment for generating n, the composite wire A after the molding is
A method of manufacturing a Nb 3 Sn superconducting wire by an internal diffusion method, characterized in that a heat treatment at 0 ° C. or higher and at a temperature not higher than a melting point of a matrix material is performed.
ある特許請求の範囲第１項目記載の内部拡散法によるＮ
ｂ３Ｓｎ超電導線の製造方法。2. The heat treatment time of the composite wire A is 0.5 to 5 hours, and N by the internal diffusion method according to claim 1 is used.
b 3 Sn superconducting wire manufacturing method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60067492A JPH0648606B2 (en) | 1985-03-30 | 1985-03-30 | Manufacturing method of Sn superconducting wire of Nb under 3 by internal diffusion method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60067492A JPH0648606B2 (en) | 1985-03-30 | 1985-03-30 | Manufacturing method of Sn superconducting wire of Nb under 3 by internal diffusion method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61227310A JPS61227310A (en) | 1986-10-09 |
| JPH0648606B2 true JPH0648606B2 (en) | 1994-06-22 |
Family
ID=13346537
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60067492A Expired - Lifetime JPH0648606B2 (en) | 1985-03-30 | 1985-03-30 | Manufacturing method of Sn superconducting wire of Nb under 3 by internal diffusion method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0648606B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5258424B2 (en) * | 2008-07-03 | 2013-08-07 | 株式会社神戸製鋼所 | Precursor for producing Nb3Sn superconducting wire, method for producing the same, and Nb3Sn superconducting wire |
-
1985
- 1985-03-30 JP JP60067492A patent/JPH0648606B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61227310A (en) | 1986-10-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4973365A (en) | Process for producing monocore precursor Nb3 Sn superconductor wire | |
| JPH0377608B2 (en) | ||
| EP0234071A1 (en) | Method of fabricating superconductive electrical conductor | |
| JPH0648606B2 (en) | Manufacturing method of Sn superconducting wire of Nb under 3 by internal diffusion method | |
| US4094059A (en) | Method for producing composite superconductors | |
| JPH0211733A (en) | Manufacture of nb3 sn superconducting wire by internal diffusing method | |
| JP3510351B2 (en) | A3 Method for producing B-type compound superconducting wire | |
| RU96116402A (en) | METHOD FOR PRODUCING COMPOSITE SUPERCONDUCTOR BASED ON NB3SN CONNECTION | |
| JP3124448B2 (en) | Method for manufacturing Nb (3) Sn superconducting wire | |
| JPS62240751A (en) | Manufacture of nb3sn super conducting wire by internal diffusion method | |
| JP2683768B2 (en) | Nb (bottom 3) Method for manufacturing Sn multi-core superconducting wire | |
| JPH0717992B2 (en) | Nb (bottom 3) Method for manufacturing Sn multicore superconducting wire | |
| JP3059570B2 (en) | Superconducting wire and its manufacturing method | |
| JPS58189909A (en) | Method of producing nb3sn superconductor | |
| JP2700249B2 (en) | Method of manufacturing Nb (3) Sn multi-core superconducting wire having high residual resistance ratio | |
| JP3058904B2 (en) | Nb Lower 3 Method for Manufacturing Sn Multicore Superconducting Wire | |
| JPH05334929A (en) | Manufacture of nb3sn superconductor | |
| JPH0815016B2 (en) | Νb ▲ 3 ▼ Manufacturing method of Sn multi-core superconducting wire | |
| JPS61115613A (en) | Production of nb-ti multicore superconductive wire | |
| JPH0211732A (en) | Manufacture of nb3sn multicore superconducting wire | |
| JPS62211359A (en) | Manufacture of nb3sn superconductor element wire | |
| JPH0579408B2 (en) | ||
| JPH03283320A (en) | Manufacture of nb3sn multicore superconductor | |
| JPH0796698B2 (en) | Manufacturing method of multi-core superconducting conductor for alternating current | |
| JPH05123875A (en) | Production of composite pipe |