JPS6323259B2 - - Google Patents
Info
- Publication number
- JPS6323259B2 JPS6323259B2 JP56030889A JP3088981A JPS6323259B2 JP S6323259 B2 JPS6323259 B2 JP S6323259B2 JP 56030889 A JP56030889 A JP 56030889A JP 3088981 A JP3088981 A JP 3088981A JP S6323259 B2 JPS6323259 B2 JP S6323259B2
- Authority
- JP
- Japan
- Prior art keywords
- aluminum alloy
- superconducting
- aluminum
- ppm
- resistance ratio
- 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
Links
- 229910000838 Al alloy Inorganic materials 0.000 claims description 15
- 230000000087 stabilizing effect Effects 0.000 claims description 11
- 229910052782 aluminium Inorganic materials 0.000 claims description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 8
- 230000006641 stabilisation Effects 0.000 claims 4
- 238000011105 stabilization Methods 0.000 claims 4
- 239000010949 copper Substances 0.000 description 9
- 239000000463 material Substances 0.000 description 8
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 3
- 229910052749 magnesium Inorganic materials 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 229910017755 Cu-Sn Inorganic materials 0.000 description 2
- 229910017927 Cu—Sn Inorganic materials 0.000 description 2
- 229910020012 Nb—Ti Inorganic materials 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910001281 superconducting alloy Inorganic materials 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
Landscapes
- Superconductor Devices And Manufacturing Methods Thereof (AREA)
Description
本発明は超電導線の安定化材として用いられる
アルミニウム合金（以下、アルミ合金と称す）に
関するものである。
超電導線は、例えば第１図，第２図，第３図に
安定化極細多芯超電導線の例を示すような構造の
ものである。各図において、１はNb芯、２は
Nb3Sn超電導化合物層、３はNb−Ti超電導合金
芯用、４はCu−Sn合金、５は安定化材である。
この安定化材５は、極低温で常電導性の金属よ
り成り、超電導線運転中、臨界温度以上に温度が
上昇した時、電流を負担し、安定化する役目をす
る。この安定化材には通常銅又はアルミニウムが
用いられている。
超電導安定化用アルミ合金としては、残留抵抗
比（常温での比抵抗／4.2Kでの比抵抗）が大き
いことが望ましく、1000以上のものが要求されて
いる。
この残留抵抗比を上げるためには、アルミニウ
ム中のAl以外の元素の量を或る程度以下にコン
トロールする必要があり、Al純度を高くすれば
する程、一般的には残留抵抗比は高くなるが、ア
ルミニウムの場合、純度を高くすると常温軟化性
が著しく増加し、加工性という観点から見ると実
用上使用し得ないものになつてしまう。
これらの残留抵抗比、強度および常温軟化性の
それぞれの特性に対して、Al以外の元素の効果
も異なり、各元素の厳密なコントロールが必要で
ある。
本発明は、上述の問題点を解決するため成され
たもので、アルミ合金中のAl以外の元素を規定
することにより、残留抵抗比1000以上で、かつ引
張強さ８Kg／mm2の特性が得られる超電導安定化材
として最適なアルミ合金を提供せんとするもので
ある。
本発明は、Fe：3ppm以上およびCu＋Si＋
Mg：5ppm以上を含み、かつ3Fe＋Cu＋Si＋Mg
≦30ppmなる関係を満足し、残部アルミニウムよ
り成ることを特徴とする超電導安定化用アルミニ
ウム合金である。ただし、各元素記号は各元素そ
れぞれの含有量を表わす。
本発明において、Fe量を3ppm以上と規定した
のは、常温軟化性を阻止し、引張強さ８Kg／mm2以
上を得るのに不可欠であるからであり、3ppm未
満では常温軟化性のため、強度も低く、又コスト
的にも増加する。
又Cu＋Si＋Mg量を5ppm以上と規定したのは、
引張強さ８Kg／mm2以上を得るのに不可欠であるか
らであり、5ppm未満では強度増加の効果がない。
強度向上のため、特にCu量をCu＋Si＋Mgの合計
量の60％以上とすることが望ましい。
又3Fe＋Cu＋Si＋Mg≦30ppmと規定したのは、
この合計量が30ppmを超えると、残留抵抗比1000
以上の性能が得られないためである。
なお、本発明合金においては、高純度アルミニ
ウムに通常含有されている不純物、例えばTi，
Ｖ，Ｂ，Mn等の元素が合計量で1ppm以下含有
されても何ら差支えない。
本発明によるアルミ合金は、実際の超電導線の
安定化材として使用した場合、最終使用サイズま
でに加工度50％以上の冷間加工を施された状態で
引張強さ８Kg／mm2以上で、最終サイズで焼鈍され
た状態で残留抵抗比1000以上の特性を得ることが
できる。
以下、本発明の実施例について説明する。
実施例：
Fe，Cu，Si，Mgを各1ppmを含む99.99996％
の高純度アルミニウムにFe，Cu，Si，Mgをそれ
ぞれ添加して表１に示す組成の合金を溶製し、25
mmX長さ300mmのインゴツトに鋳造し、12mmの
線材に熱間加工した後、冷間伸線により0.3mm
のアルミ合金線を作成した。
この0.3mmの線において、硬引線の状態で引
張強さを測定し、又150℃で２時間焼鈍した線の
残留抵抗比（ρ293K／ρ4.2K）を測定した結果は
表１に示す通りである。
The present invention relates to an aluminum alloy (hereinafter referred to as aluminum alloy) used as a stabilizing material for superconducting wires. The superconducting wire has a structure as shown in FIGS. 1, 2, and 3, for example, as examples of stabilized ultrafine multicore superconducting wires. In each figure, 1 is Nb core, 2 is
Nb 3 Sn superconducting compound layer, 3 for Nb-Ti superconducting alloy core, 4 for Cu-Sn alloy, and 5 for stabilizing material. This stabilizing material 5 is made of a metal that is normally conductive at extremely low temperatures, and serves to carry the current and stabilize it when the temperature rises above the critical temperature during operation of the superconducting wire. Copper or aluminum is usually used as the stabilizing material. As an aluminum alloy for stabilizing superconductivity, it is desirable that the residual resistance ratio (specific resistance at room temperature/specific resistance at 4.2K) be large, and a value of 1000 or more is required. In order to increase this residual resistance ratio, it is necessary to control the amount of elements other than Al in aluminum to a certain level, and generally speaking, the higher the Al purity, the higher the residual resistance ratio. However, in the case of aluminum, when the purity is increased, the room temperature softening property increases significantly, making it practically unusable from the viewpoint of workability. Elements other than Al have different effects on the characteristics of residual resistance ratio, strength, and room-temperature softening, and strict control of each element is required. The present invention was made to solve the above-mentioned problems, and by specifying elements other than Al in the aluminum alloy, it is possible to achieve a residual resistance ratio of 1000 or more and a tensile strength of 8 kg/mm 2 . The aim is to provide an aluminum alloy that is optimal as a superconducting stabilizing material. The present invention is characterized in that Fe: 3ppm or more and Cu+Si+
Mg: Contains 5ppm or more, and 3Fe + Cu + Si + Mg
This is an aluminum alloy for stabilizing superconductivity, which satisfies the relationship: ≦30ppm, and the balance is made of aluminum. However, each element symbol represents the content of each element. In the present invention, the reason why the amount of Fe is specified as 3 ppm or more is because it is essential to prevent softening at room temperature and obtain a tensile strength of 8 Kg/mm 2 or more. It has low strength and also increases cost. Also, the reason why the amount of Cu + Si + Mg was specified as 5 ppm or more was because
This is because it is essential to obtain a tensile strength of 8 Kg/mm 2 or more, and if it is less than 5 ppm, there is no effect of increasing the strength.
In order to improve strength, it is particularly desirable that the amount of Cu be 60% or more of the total amount of Cu+Si+Mg. Also, the reason for specifying 3Fe+Cu+Si+Mg≦30ppm is that
If this total amount exceeds 30ppm, the residual resistance ratio will be 1000
This is because the above performance cannot be obtained. In addition, in the present alloy, impurities normally contained in high-purity aluminum, such as Ti,
There is no problem even if elements such as V, B, and Mn are contained in a total amount of 1 ppm or less. When the aluminum alloy according to the present invention is used as a stabilizing material for an actual superconducting wire, it has a tensile strength of 8 Kg/mm 2 or more after being cold-worked to a final use size of 50% or more. It is possible to obtain characteristics with a residual resistance ratio of 1000 or more when annealed to the final size. Examples of the present invention will be described below. Example: 99.99996% containing 1 ppm each of Fe, Cu, Si, and Mg
An alloy with the composition shown in Table 1 was produced by adding Fe, Cu, Si, and Mg to high-purity aluminum.
After casting into an ingot with a length of mm
aluminum alloy wire was created. The tensile strength of this 0.3 mm wire was measured in the hard drawn state, and the residual resistance ratio (ρ293K/ρ4.2K) of the wire annealed at 150℃ for 2 hours was measured.The results are shown in Table 1. be.
【表】
表１より、本発明によるものNo.１〜７はいずれ
も残留抵抗比1000以上、かつ引張強さ８Kg／mm2の
性能を満足するが、比較例のNo.８〜11はどちらか
の性能を満足しないことが分る。
以上述べたように、本発明のアルミニウム合金
は、Fe：3ppm以上およびCu＋Si＋Mg：5ppm以
上を含み、かつ3Fe＋Cu＋Si＋Mg≦30ppmなる
関係を満足し、酸部アルミニウムより成るから、
Fe，Cu，Si，Mgにより常温軟化性を阻止し、強
度を増加し、硬引状態で８Kg／mm2以上の引張強さ
が得られると共に、それぞれ上限以下に規定する
ことにより、焼鈍状態で1000以上の残留抵抗比が
得られ、超電導安定化材として最適のアルミ合金
を提供する利点がある。[Table] From Table 1, Nos. 1 to 7 according to the present invention all satisfy the performance of a residual resistance ratio of 1000 or more and a tensile strength of 8 Kg/mm 2 , but none of Comparative Examples Nos. 8 to 11 It turns out that the performance is not satisfied. As described above, the aluminum alloy of the present invention contains Fe: 3 ppm or more and Cu + Si + Mg: 5 ppm or more, satisfies the relationship 3Fe + Cu + Si + Mg ≦ 30 ppm, and is made of acid part aluminum.
Fe, Cu, Si, and Mg prevent softening at room temperature and increase strength, allowing a tensile strength of 8 Kg/mm 2 or more to be obtained in the hardened state, and by specifying each below the upper limit, it is possible to maintain It has the advantage of providing a residual resistance ratio of over 1000 and providing an aluminum alloy that is optimal as a superconducting stabilizing material.
第１図，第２図および第３図はそれぞれ安定化
極細多芯超電導線の例を示す横断面図である。
１……Nb芯、２……Nb3Sn超電導化合物層、
３……Nb−Ti超電導合金芯、４……Cu−Sn合
金、５……安定化材。
FIGS. 1, 2, and 3 are cross-sectional views showing examples of stabilized ultrafine multicore superconducting wires, respectively. 1...Nb core, 2...Nb 3 Sn superconducting compound layer,
3... Nb-Ti superconducting alloy core, 4... Cu-Sn alloy, 5... Stabilizing material.
Claims (1)
上を含み、かつ3Fe＋Cu＋Si＋Mg≦30ppmなる
関係を満足し、残部アルミニウムより成ることを
特徴とする超電導安定化用アルミニウム合金。 ２ 超電導安定化用アルミニウム合金が、最終使
用サイズまでに加工度50％以上の冷間加工を施さ
れたものであり、引張強さ８Kg／mm2以上を有する
特許請求の範囲第１項記載の超電導安定化用アル
ミニウム合金。 ３ 超電導安定化用アルミニウム合金が、最終使
用サイズで焼鈍されたものであり、残留抵抗比
1000以上を有する特許請求の範囲第１項又は第２
項記載の超電導安定化用アルミニウム合金。[Claims] 1. An aluminum alloy for stabilizing superconductivity, which contains Fe: 3 ppm or more and Cu+Si+Mg: 5 ppm or more, and satisfies the relationship 3Fe+Cu+Si+Mg≦30ppm, with the remainder being aluminum. 2. The aluminum alloy for superconducting stabilization is cold-worked to a final use size with a working degree of 50% or more, and has a tensile strength of 8 Kg/mm 2 or more. Aluminum alloy for superconducting stabilization. 3 The aluminum alloy for superconducting stabilization is annealed to the final use size, and the residual resistance ratio is
Claim 1 or 2 having 1000 or more
The aluminum alloy for superconducting stabilization described in .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56030889A JPS57145957A (en) | 1981-03-03 | 1981-03-03 | Aluminum alloy for stabilizing superconduction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56030889A JPS57145957A (en) | 1981-03-03 | 1981-03-03 | Aluminum alloy for stabilizing superconduction |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57145957A JPS57145957A (en) | 1982-09-09 |
| JPS6323259B2 true JPS6323259B2 (en) | 1988-05-16 |
Family
ID=12316285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56030889A Granted JPS57145957A (en) | 1981-03-03 | 1981-03-03 | Aluminum alloy for stabilizing superconduction |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57145957A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0672407A (en) * | 1992-08-20 | 1994-03-15 | Mitsubishi Electric Corp | Embossed taping method |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5266416A (en) * | 1991-02-20 | 1993-11-30 | The Furukawa Electric Co., Ltd. | Aluminum-stabilized superconducting wire |
| WO2002031894A1 (en) | 2000-10-09 | 2002-04-18 | Aluminium Pechiney | Supraconductive conductor comprising an aluminium-based cryogenic stabiliser |
| JP5086592B2 (en) * | 2006-09-25 | 2012-11-28 | 住友化学株式会社 | Cold work material |
| JP5086598B2 (en) * | 2006-10-06 | 2012-11-28 | 住友化学株式会社 | Cold work material |
| JP2012234939A (en) | 2011-04-28 | 2012-11-29 | High Energy Accelerator Research Organization | Magnetic shielding material for superconducting magnet |
| JP2012234938A (en) * | 2011-04-28 | 2012-11-29 | High Energy Accelerator Research Organization | Low-temperature heat transfer material |
-
1981
- 1981-03-03 JP JP56030889A patent/JPS57145957A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0672407A (en) * | 1992-08-20 | 1994-03-15 | Mitsubishi Electric Corp | Embossed taping method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57145957A (en) | 1982-09-09 |
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