JPS6044914A - Method of producing nb3sn multicore superconductive wire - Google Patents
Method of producing nb3sn multicore superconductive wireInfo
- Publication number
- JPS6044914A JPS6044914A JP58152861A JP15286183A JPS6044914A JP S6044914 A JPS6044914 A JP S6044914A JP 58152861 A JP58152861 A JP 58152861A JP 15286183 A JP15286183 A JP 15286183A JP S6044914 A JPS6044914 A JP S6044914A
- Authority
- JP
- Japan
- Prior art keywords
- heat treatment
- nb3sn
- wire
- pipe
- stage
- 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
- 238000000034 method Methods 0.000 title claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 19
- 229910000657 niobium-tin Inorganic materials 0.000 claims description 12
- 229910052802 copper Inorganic materials 0.000 claims description 7
- 229910017755 Cu-Sn Inorganic materials 0.000 claims description 6
- 229910017927 Cu—Sn Inorganic materials 0.000 claims description 6
- 229910045601 alloy Inorganic materials 0.000 claims description 6
- 239000000956 alloy Substances 0.000 claims description 6
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 229910052718 tin Inorganic materials 0.000 claims description 6
- 239000002131 composite material Substances 0.000 claims description 4
- 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
- 238000000137 annealing Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000005482 strain hardening Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000005491 wire drawing 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)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
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、特に最終熱
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
。Detailed Description of the Invention [Technical Field of the Invention] The present invention relates to a multicore structure Nb3Sn superconducting wire, particularly in a pipe construction method that does not require intermediate annealing during cold working before final heat treatment. The present invention relates to a method for manufacturing a Nb3Sn multicore superconducting wire that can significantly shorten the diffusion heat treatment time.
［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
の外周にざらに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拡散熱処狸を施した後
、高温でＮｂ３Ｓｎ生成の熱処理を施す方法かパイプ構
造法として知られＣいる（特公昭５５−１６５４７号公
報）。[Technical background of the invention] As a conventional method for manufacturing Nb3Sn multicore superconducting wires, Cu and Nb are successively arranged concentrically around the outer periphery of an Sn rod, and a cross-section reduction process is applied to a composite body in which Cu is brought into rough contact with the outer periphery. There is a method known as the pipe structure method in which Cu and Sn diffusion heat treatment is performed at a low temperature, followed by a heat treatment to generate Nb3Sn at a high temperature (Japanese Patent Publication No. 16547/1983).
［背景技術の問題点］
しかｊ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ｌる必要があ
るが、例えば外径１〜２ｍｍφの多心線材に対して３０
０℃で６時間以上の熱処理を必要とし、その熱処理時間
の短縮か望まれてい）こ。[Problems in the Background Art] However, in the above method, it is necessary to produce a uniform Cu-Sn alloy by diffusion heat treatment at low temperatures, but it is difficult to produce a uniform Cu-Sn alloy by, for example, a multi-core wire with an outer diameter of 1 to 2 mmφ. against 30
This requires heat treatment at 0°C for 6 hours or more, and it is 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ｈたものＣ
で、パイプ構造法におｆＪ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
の製造法を提供Ｊ−ることを目的とする。[Object of the Invention] The present invention has been made to solve these conventional difficulties.C
It is an object of the present invention to provide a method for manufacturing a Nb3Sn multicore superconducting wire that can significantly shorten the time required for diffusion heat treatment to form a Cu-Sn alloy in a pipe structure method.
［発明の概要］
すなわち本発明のＮｂ３Ｓｎ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合金とじ、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 method for manufacturing an Nb3Sn multi-core superconducting wire of the present invention is a composite wire in which a large number of tubes made of Nb-based metal are arranged in a Cu matrix, and Cu and Sn are accommodated in the Nb tube. A first stage heat treatment is applied to the Cu in the Nb tube.
In the method of forming a Cu-Sn alloy by diffusing and Sn, and then performing a second heat treatment to generate an Nb3Sn compound layer inside the Nb tube, Cu is deposited in the Nb tube.
It is characterized by accommodating a large number of coated Sn wires and performing the first stage heat treatment at a temperature of 250 to 350° C. 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イｊくとも
７本以上とすることが好ましい。In the present invention, the greater the number of Cu-coated Sn wires accommodated in the Nb tube, the shorter the heat treatment time, but since the processing and assembly steps before heat treatment become complicated, the number of Cu-coated Sn wires is at least 7 or more. It is 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艮＜なり、まｌこ３５
０℃を越えると溶媒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時間未届ではＣｕとＳｎは十分に均一に拡散せ
ず、また１．５時間以上で完全に均一な状態を得ること
かできるためである。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。In addition, the first stage heat treatment was performed at 250 to 350°C with a temperature of 0.5
It is applied for ~1.5 hours, but the reason for limiting it to this range is that if the temperature is less than 250°C, the diffusion time will be shortened.
This is because when the temperature exceeds 0°C, the Sn solvent dissolves from both ends of the wire, reducing the amount of Sn that contributes to Nb3Sn formation and deteriorating the final superconducting properties. This is because Cu and Sn do not diffuse sufficiently uniformly, and a completely uniform state cannot be obtained in 1.5 hours or more. Furthermore, the second stage heat treatment was performed at 650 to 850°C for 10
Applied in ~170 hours.
［発明の実施例］ 以下、本発明の実施例おＪひ比較例について説明する。[Embodiments 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【こ、Ｓ
ｎロツドを配直し、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、５．５ｍ
ｍφ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パイプおよひ外径９．７ｍｍ
φ、内径８．１ｍｍφのＣｕパイノを順に配置し、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４６ｍｍ
φ、内径４１ｍｍφのＣｕパイプ中に充填し、次いで冷
間加工を施して１．４ｍｍφ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なかった。Cu pipe with an exception diameter of 13 mmφ and an inner diameter of 8 mmφ [this, S
N rods were rearranged and then cold-worked to form a regular hexagonal cross section. 37 composite wires with an outer diameter of 46 mmφ,
After filling a Cu pipe with an inner diameter of 41 mmφ, 5.5 m
The wire was drawn to mφ. The outer diameter of this wire is 8mmφ.
, Nb pipe with an inner diameter of 5 or 6 mmφ and an outer diameter of 9.7 mm.
φ, inner diameter 8.1 mm φ were arranged in order, and then wire drawing was performed to make wire rods with a regular hexagonal cross section with a distance between parallel surfaces of 2.14 mm, and these 264 wires were made into wire rods with an outer diameter of 46 mm.
It was filled into a Cu pipe with an inner diameter of 41 mm and then subjected to cold working to produce a wire rod with a diameter of 1.4 mm. Note that intermediate annealing was never performed in the above processing steps.
このようにして得た線材に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−Ｓｎ合金
が生成された。When the wire obtained in this way was heat treated at 300° C. for 1 hour, a uniform Cu-Sn alloy was formed in each Nb pipe.
さらに７２５℃×１０時間の熱処理ヲ施しくＮｂパイプ
内側にＮｂ３Ｓｎ相を生成さけた。この超電導線の臨界
電流値は７Ｔで１３００Ａであった。Furthermore, a heat treatment was performed at 725° C. for 10 hours to avoid forming an Nb3Sn phase inside the Nb pipe. The critical current value of this superconducting wire was 7T and 1300A.
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
線材を製造しだ。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。Comparative Example A single Cu-coated Sn wire was placed inside the Nb pipe used in the Example, and a wire rod with a diameter of 1.4 mm was manufactured in the same manner as in the Example except for the following. In this case, Cu/in the Nb pipe
The Sn ratio was the same as in the example.
この線材に３００℃て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。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（Ｊ多数本配置され（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
時間箸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ぜるととかできる。[Effects of the Invention] As described above, according to the present invention, Sn serving as a diffusion source is disposed in a large number of Nb tubes through a Cu layer. The generation diffusion time can be significantly shortened, and the production efficiency of Nb3Sn multi-core superconducting wires can be improved.
代理人弁理士 須 山 佐 一
くほか１名）
自１頁の続き
多発 明 者 熊 野 智 幸 川崎市川崎区小田栄２
丁目社内
１番１号 昭和電線電纜株式会(Representative Patent Attorney Kazuyoshi Suyama and 1 other person) Many continuations of my own 1 page Akira Tomoyuki Kumano 2, Oda Sakae, Kawasaki-ku, Kawasaki City
Chome In-house No. 1-1 Showa Electric Wire & Cable Co., Ltd.
Claims (1)
置し、前記Ｎｂ管中にＣｕおよびＳｎを取容してなる複
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ｕ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ｂに、第１段目の熱処
理を２５０〜３５０℃の温度で０．５〜１．５時間施す
ことを特徴とづるＮｂ３Ｓｎ多心超電導線の製造方法。A large number of tubes made of Nb-based metals are arranged in a Cu matrix, and a first stage heat treatment is performed on a composite wire made of Cu and Sn contained in the Nb tubes to remove Cu and Sn in the Nb tubes. is diffused to form a Cu-Sn alloy, and then a second
In the method of generating a Nb3Sn compound layer inside the Nb tube by performing a heat treatment in the first stage, when a large number of Cu-coated Sn wires are accommodated in the Nb tube, the heat treatment in the first stage is performed at 250-350 °C. A method for producing a Nb3Sn multi-core superconducting wire, characterized in that the process is carried out at a temperature of 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 true JPS6044914A (en) | 1985-03-11 |
| JPH0815016B2 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) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH034755A (en) * | 1989-06-02 | 1991-01-10 | Nisshin Flour Milling Co Ltd | Ang-khak-containing noodle |
-
1983
- 1983-08-22 JP JP58152861A patent/JPH0815016B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH034755A (en) * | 1989-06-02 | 1991-01-10 | Nisshin Flour Milling Co Ltd | Ang-khak-containing noodle |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0815016B2 (en) | 1996-02-14 |
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