JPH0815016B2 - Νb ▲ 3 ▼ Manufacturing method of Sn multi-core superconducting wire - Google Patents
Νb ▲ 3 ▼ Manufacturing method of Sn multi-core superconducting wireInfo
- Publication number
- JPH0815016B2 JPH0815016B2 JP58152861A JP15286183A JPH0815016B2 JP H0815016 B2 JPH0815016 B2 JP H0815016B2 JP 58152861 A JP58152861 A JP 58152861A JP 15286183 A JP15286183 A JP 15286183A JP H0815016 B2 JPH0815016 B2 JP H0815016B2
- Authority
- JP
- Japan
- Prior art keywords
- heat treatment
- wire
- tube
- superconducting wire
- mmφ
- 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
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 10
- 229910052802 copper Inorganic materials 0.000 claims description 8
- 229910052718 tin Inorganic materials 0.000 claims description 7
- 229910045601 alloy Inorganic materials 0.000 claims description 6
- 239000000956 alloy Substances 0.000 claims description 6
- 229910017755 Cu-Sn Inorganic materials 0.000 claims description 5
- 229910017927 Cu—Sn Inorganic materials 0.000 claims description 5
- 239000002131 composite material Substances 0.000 claims description 5
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims description 2
- 239000011159 matrix material Substances 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 150000002739 metals Chemical class 0.000 claims 1
- 238000009792 diffusion process Methods 0.000 description 7
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000000137 annealing Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000005491 wire drawing Methods 0.000 description 2
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000004904 shortening 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)
Description
【発明の詳細な説明】 ［発明の技術分野］ 本発明は、多心構造のNb3Sn超電導線、特に最終処理
前の冷間加工中に中間焼鈍を必要としないパイプ構造法
において、CuとSnとの拡散熱処理時間を著しく短縮可能
なNb3Sn多心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 Nb 3 Sn superconducting wire having a multi-core structure, particularly in a pipe structure method that does not require intermediate annealing during cold working before final treatment. The present invention relates to a manufacturing method of Nb 3 Sn multi-core superconducting wire capable of significantly reducing the diffusion heat treatment time with Sn.
［発明の技術的背景］ 従来Nb3Sn多心超電導線の製造方法として、Snロッド
の外周にCuおよびNbを順次同心状に配置し、この外周に
さらにCuを接触させた複合体に断面減少加工を施し、次
いで低温でCuとSnの拡散熱処理を施した後、高温でNb3S
n生成の熱処理を施す方法がパイプ構造法として知られ
ている（特公昭55−16547号公報）。[Technical background of the invention] As a conventional manufacturing method of Nb 3 Sn multi-core superconducting wire, Cu and Nb are sequentially arranged concentrically on the outer circumference of a Sn rod, and the cross-section is reduced to a composite in which Cu is further brought into contact with the outer circumference. Processed, then Cu and Sn diffusion heat treatment at low temperature, then Nb 3 S at high temperature.
A method of performing heat treatment for forming n is known as a pipe structure method (Japanese Patent Publication No. 55-16547).
［背景技術の問題点］ しかしながら、上記の方法においては、低温での拡散
熱処理により均一なCu−Sn合金を生成させる必要がある
が、例えば外径１〜2mmφの多心線材に対して300℃で６
時間以上の熱処理を必要とし、その熱処理時間の短縮が
望まれていた。[Problems of background art] However, in the above method, it is necessary to generate a uniform Cu-Sn alloy by diffusion heat treatment at a low temperature, but for example, 300 ° C for a multifilamentary wire having an outer diameter of 1-2 mmφ. In 6
A heat treatment for more than an hour is required, and it has been desired to shorten the heat treatment time.
［発明の目的］ 本発明はかかる従来の難点を解消すべくなされたもの
で、パイプ構造法におけるCu−Sn合金生成の拡散熱処理
時間を著しく短縮可能なNb3Sn多心超電導線の製造方法
を提供することを目的とする。[Object of the Invention] The present invention has been made to solve such conventional problems, and provides a method for producing a Nb 3 Sn multi-core superconducting wire capable of significantly shortening the diffusion heat treatment time for forming a Cu-Sn alloy in a pipe structure method. The purpose is to provide.
［発明の概要］ すなわち本発明のNb3多心超電導線の製造方法は、Cu
マトリックス中に多数のNb系金属よりなる管を配置し、
前記Nb管中にCuおよびSnを収容してなる複合線に第１段
目の熱処理を施して前記Nb管中のCuおよびSnを拡散させ
てCu−Sn合金とし、次いで第２段目の熱処理を施して前
記Nb管内側にNb3Sn化合物層を生成させる方法におい
て、前記Nb管中にCu被覆Sn線の多数本を収容するととも
に、第１段目の熱処理を250〜350℃の温度で0.5〜1.5時
間施すことを特徴としている。[Summary of the Invention] That is, the manufacturing method of the Nb 3 multi-core superconducting wire of the present invention is Cu
Arranging many Nb-based metal tubes in the matrix,
The first step heat treatment is applied to the composite wire containing Cu and Sn in the Nb tube to diffuse Cu and Sn in the Nb tube into a Cu-Sn alloy, and then the second step heat treatment. In the method of forming a Nb 3 Sn compound layer inside the Nb tube by applying the above method, while accommodating a large number of Cu-coated Sn wires in the Nb tube, the first stage heat treatment is performed at a temperature of 250 to 350 ° C. It is characterized by being applied for 0.5 to 1.5 hours.
本発明において、Nb管中に収容されるCu被覆Sn線の本
数は多い程その熱処理時間が短くなるが、熱処理前の加
工および組込み工程が複雑となるため少なくとも７本以
上とすることが好ましい。In the present invention, the larger the number of Cu-coated Sn wires accommodated in the Nb tube, the shorter the heat treatment time. However, since the processing and assembling steps before the heat treatment become complicated, at least 7 or more wires are preferable.
また、第１段目の熱処理は、250〜350℃で0.5〜1.5時
間施されるが、この範囲に限定した理由は温度が250℃
未満では拡散時間が長くなり、また350℃を越えると溶
融Snが線材の両端末から溶け出してNb3Sn生成に寄与す
るSnが減少して最終的な超電導特性を低下させるためで
あり、一方、この温度範囲では0.5時間未満ではCuとSn
が十分に均一に拡散せず、また1.5時間以下で完全に均
一な状態を得ることができるためである。さらに第２段
目の熱処理は、通常のNb3Sn生成の条件である650〜850
℃で10〜170時間で施される。The first stage heat treatment is performed at 250 to 350 ° C for 0.5 to 1.5 hours. The reason for limiting this range is that the temperature is 250 ° C.
If it is less than 350 ° C, the diffusion time becomes long, and if it exceeds 350 ° C, molten Sn will elute from both ends of the wire and Sn that contributes to Nb 3 Sn formation will decrease, thus deteriorating the final superconducting property. , In this temperature range less than 0.5 hours Cu and Sn
Is not sufficiently uniformly diffused, and a completely uniform state can be obtained in 1.5 hours or less. Further, the second stage heat treatment is 650 to 850, which is a normal condition for Nb 3 Sn formation.
It is applied at 0 to 170 hours.
［発明の実施例］ 以下、本発明の実施例および比較例について説明す
る。[Examples of the Invention] Examples of the present invention and comparative examples will be described below.
実施例 外径13mmφ、内径8mmφのCuパイプ中に、Snロッドを
配置し、これに冷間加工を施して断面正六角形に成形し
た複合線の37本をさらに外径46mmφ、内径41mmφのCuパ
イプ中に充填した後、5.5mmφまで伸線加工した。この
線材の外周に外径8mmφ、内径5.6mmφのNbパイプおよび
外径9.7mmφ、外径8.1mmφのCuパイプを順に配置し、次
いで伸線加工を施して平行面間の距離2.14mmの断面正六
角形の線材とした後、この264本を外径46mmφ、内径41m
mφのCuパイプ中に充填し、次いで冷間加工を施して1.4
mmφの線材を製造した。なお以上の加工工程において中
間焼鈍は一度も施されなかった。Example: A Cu pipe with an outer diameter of 13 mmφ and an inner diameter of 8 mmφ is arranged with Sn rods, and 37 pieces of composite wires that are cold-worked to form a regular hexagonal cross section are further used to form a Cu pipe with an outer diameter of 46 mmφ and an inner diameter of 41 mmφ. After filling the inside, wire drawing was performed up to 5.5 mmφ. A Nb pipe with an outer diameter of 8 mmφ, an inner diameter of 5.6 mmφ and a Cu pipe with an outer diameter of 9.7 mmφ and an outer diameter of 8.1 mmφ are arranged in this order on the outer periphery of this wire rod, and then wire drawing is performed to make a cross section with a distance of 2.14 mm between parallel planes. After forming a square wire rod, these 264 wires have an outer diameter of 46 mmφ and an inner diameter of 41 m.
It was filled into mφ Cu pipe and then cold-worked to 1.4.
A mmφ wire rod was manufactured. The intermediate annealing was never performed in the above processing steps.
このようにして得た線材300℃×１時間の熱処理を施
したところ、各Nbパイプ内に均一なCu−Su合金が生成さ
れた。When the wire rod thus obtained was subjected to heat treatment at 300 ° C. for 1 hour, a uniform Cu—Su alloy was formed in each Nb pipe.
さらに725℃×10時間の熱処理を施してNbパイプ内側
にNb3Sn相を生成させた。この超電導線の臨界電流値は7
Tで1300Aであった。Further, heat treatment was performed at 725 ° C for 10 hours to generate Nb 3 Sn phase inside the Nb pipe. The critical current value of this superconducting wire is 7
It was 1300A at T.
比較例 実施例で用いたNbパイプ内にCu被覆Snの単一線を配置
し、他は実施例と同様の方法により1.4mmφの線材を製
造した。なおこの場合、Nbパイプ内のCu/Sn比は実施例
と同一とした。この線材に300℃で熱処理を施したとこ
ろ、Nbパイプ内のCuとSnを均一に拡散させるのに約６時
間を要した。Comparative Example A single wire of Cu-coated Sn was placed in the Nb pipe used in the example, and a wire rod of 1.4 mmφ was manufactured by the same method as in the example other than the above. In this case, the Cu / Sn ratio in the Nb pipe was the same as that in the example. When this wire was heat-treated at 300 ° C., it took about 6 hours to uniformly diffuse Cu and Sn in the Nb pipe.
［発明の効果］ 以上述べたように本発明によれば、拡散源となるSnが
Cu層を介してNb管内に多数本配置されているため、第１
段目の熱処理におけるCu−Sn合金生成の拡散時間著しく
短縮することができ、Nb3Sn多心超電導線の生産効率を
向上させることができる。[Advantages of the Invention] As described above, according to the present invention, Sn that is a diffusion source is
Since many tubes are arranged in the Nb tube through the Cu layer,
The diffusion time of Cu—Sn alloy formation in the heat treatment of the second step can be significantly shortened, and the production efficiency of the Nb 3 Sn multicore superconducting wire can be improved.
───────────────────────────────────────────────────── 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 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Nobuo Aoki Inventor No. 1-1 Oda Sakae, Kawasaki-ku, Kawasaki-shi, Kanagawa 2-1-1, Showa Electric Cable Co., Ltd. (72) Tomoyuki Kumano 2 Sakae Oda, Kawasaki-ku, Kawasaki, Kanagawa No. 1-1 No. 1 Showa Electric Cable Co., Ltd.
Claims (1)
る管を配置し、前記Nb管中にCuおよびSnを収容してなる
複合線に第１段目の熱処理を施して前記Nb管中のCuおよ
びSnを拡散させてCu−Sn合金とし、次いで第２段目の熱
処理を施して前記Nb管内側にNb3Sn化合物層を生成させ
る方法において、前記Nb管中にCu被覆Sn線の多数本を収
容するとともに、第１段目の熱処理を250〜350℃の温度
で0.5〜1.5時間施すことを特徴とするNb3Sn多心超電導
線の製造方法。1. A composite wire comprising a large number of Nb-based metals arranged in a Cu matrix, the composite wire containing Cu and Sn contained in the Nb tube is subjected to a first-stage heat treatment, and then the Nb tube is subjected to a heat treatment. by diffusing Cu and Sn and the Cu-Sn alloy, in then process to produce Nb 3 Sn compound layer on the Nb tube side heat-treated in the second stage, the Cu coated Sn wire in the Nb tube A method for manufacturing a Nb 3 Sn multi-core superconducting wire, which comprises accommodating a large number of wires and subjecting the first stage heat treatment to a temperature of 250 to 350 ° C. for 0.5 to 1.5 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58152861A JPH0815016B2 (en) | 1983-08-22 | 1983-08-22 | Νb ▲ 3 ▼ Manufacturing method of Sn multi-core superconducting wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58152861A JPH0815016B2 (en) | 1983-08-22 | 1983-08-22 | Νb ▲ 3 ▼ Manufacturing method of Sn multi-core superconducting wire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6044914A JPS6044914A (en) | 1985-03-11 |
| JPH0815016B2 true JPH0815016B2 (en) | 1996-02-14 |
Family
ID=15549721
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58152861A Expired - Lifetime JPH0815016B2 (en) | 1983-08-22 | 1983-08-22 | Νb ▲ 3 ▼ Manufacturing method of Sn multi-core superconducting wire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0815016B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2720071B2 (en) * | 1989-06-02 | 1998-02-25 | 日清製粉株式会社 | Monascus noodles |
-
1983
- 1983-08-22 JP JP58152861A patent/JPH0815016B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6044914A (en) | 1985-03-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB1435459A (en) | Manufacture of a composite electrical conductor including a superconductive conductor | |
| JPS61194155A (en) | Production of nb3sn superconductive wire | |
| JPH0815016B2 (en) | Νb ▲ 3 ▼ Manufacturing method of Sn multi-core superconducting wire | |
| JPH0211733A (en) | Manufacture of nb3 sn superconducting wire by internal diffusing method | |
| JP2544096B2 (en) | Nb (bottom 3) Method for manufacturing Sn superconducting wire | |
| JPH0717992B2 (en) | Nb (bottom 3) Method for manufacturing Sn multicore superconducting wire | |
| JP2683768B2 (en) | Nb (bottom 3) Method for manufacturing Sn multi-core superconducting wire | |
| JP3124448B2 (en) | Method for manufacturing Nb (3) Sn superconducting wire | |
| JP3059570B2 (en) | Superconducting wire and its manufacturing method | |
| JP2700249B2 (en) | Method of manufacturing Nb (3) Sn multi-core superconducting wire having high residual resistance ratio | |
| JP3058890B2 (en) | Nb Lower 3 Method for Manufacturing Sn Superconducting Wire | |
| JPS61115612A (en) | Production of nb-ti multicore superconductive wire | |
| JPS58189909A (en) | Method of producing nb3sn superconductor | |
| JP3058904B2 (en) | Nb Lower 3 Method for Manufacturing Sn Multicore Superconducting Wire | |
| JPS6358714A (en) | Manufacture of nb3sn multi-core superconductor | |
| JPH01312803A (en) | Manufacture of nb3sn magnet | |
| JPS63271818A (en) | Manufacture of nb3sn superconductive wire by external diffusion method | |
| JPH03283322A (en) | Manufacture of nb3al superconductor | |
| JPH03283320A (en) | Manufacture of nb3sn multicore superconductor | |
| JPH0211732A (en) | Manufacture of nb3sn multicore superconducting wire | |
| JPS61227310A (en) | Manufacture of nb3 sn by internal diffusion | |
| JPS6113508A (en) | Method of producing low copper ratio nb3sn superconductive wire | |
| JPS63218106A (en) | Manufacture of internal diffusion type multicore superconductive wire | |
| JPH0676662A (en) | Manufacture of nb3sn superconducting wire | |
| JPS63213212A (en) | Manufacture of internal diffusion type nb3 sn superconductive wire |