JP2003086031A - Sheath material for superconductive material, manufacturing method therefor and superconductive wire material - Google Patents
Sheath material for superconductive material, manufacturing method therefor and superconductive wire materialInfo
- Publication number
- JP2003086031A JP2003086031A JP2001271136A JP2001271136A JP2003086031A JP 2003086031 A JP2003086031 A JP 2003086031A JP 2001271136 A JP2001271136 A JP 2001271136A JP 2001271136 A JP2001271136 A JP 2001271136A JP 2003086031 A JP2003086031 A JP 2003086031A
- Authority
- JP
- Japan
- Prior art keywords
- sheath
- superconducting
- superconductive
- wire
- sheath material
- 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.)
- Pending
Links
- 239000000463 material Substances 0.000 title claims abstract description 108
- 238000004519 manufacturing process Methods 0.000 title claims description 17
- 238000000034 method Methods 0.000 claims description 12
- 239000002131 composite material Substances 0.000 claims description 11
- 229910001316 Ag alloy Inorganic materials 0.000 claims description 7
- 150000001875 compounds Chemical class 0.000 abstract 1
- 238000005491 wire drawing Methods 0.000 description 12
- 229910052709 silver Inorganic materials 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 230000001771 impaired effect Effects 0.000 description 3
- 238000007747 plating Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 238000005304 joining Methods 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 229910019015 Mg-Ag Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000003466 welding 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
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、超電導材料を内側
に包含する線材に用いる超電導材用シース材およびその
製造方法並びに超電導線材に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheath material for a superconducting material used for a wire containing a superconducting material inside, a method for producing the same, and a superconducting wire.
【０００２】[0002]
【従来の技術】従来、酸化物系超電導材料の線材を製造
する場合は、材料としてＡｇもしくはＡｇの加工性を損
なわない程度に添加元素を加えたＡｇを主体としたＡｇ
合金または酸素に対するＡｇの特性を活かした内部酸化
型分散強化材等の材料をパイプ状に成形したシース材を
製作し、そのシース材内部に酸化物系超電導材料の粉体
を充填した後、それを段階的に伸線加工し、必要に応じ
てその前後に熱処理等を施し、粉体を融合させて酸化物
系超電導線材とすることが行われている。2. Description of the Related Art Conventionally, when a wire made of an oxide-based superconducting material is manufactured, Ag is mainly composed of Ag or Ag containing an additive element to the extent that the workability of Ag is not impaired.
A sheath material is manufactured by molding a material such as an alloy or an internal oxidation type dispersion strengthening material that takes advantage of the characteristics of Ag with respect to oxygen into a pipe shape, and after filling the inside of the sheath material with powder of an oxide superconducting material, Is gradually drawn, and heat treatment or the like is performed before and after the drawing, and the powder is fused to obtain an oxide-based superconducting wire.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上述し
た従来の技術においては、ＡｇもしくはＡｇを主体とし
たＡｇ合金をシース材の材料として用いるために、Ａｇ
本来の特性である室温での経時軟化が発生し機械的強度
が不足することによって、内部に充填した粉体の部分的
な固化等により、伸線加工時に局所的な応力過大を生
じ、シース材の亀裂等が発生し易く、時には断線に至る
という問題があった。However, in the above-mentioned conventional technique, since Ag or an Ag alloy mainly containing Ag is used as the material of the sheath material, Ag is used.
Due to the inherent property of softening over time at room temperature and lack of mechanical strength, partial solidification of the powder filled inside causes local overstress during wire drawing and sheath material. There is a problem that cracks and the like are likely to occur and sometimes lead to disconnection.
【０００４】この結果、生産時の歩留まりが低下するば
かりか、伸線加工時に断面積減少率を大きくとる強加工
が困難であり、生産効率が低く生産コストが上昇すると
いう問題があった。そこで、本発明は、伸線加工時の強
加工に耐える十分な機械的強度を有するシース材を実現
することを目的とする。As a result, not only the yield at the time of production is lowered, but also it is difficult to carry out the heavy working to obtain a large reduction rate of the cross-sectional area at the time of the wire drawing, and the production efficiency is low and the production cost is increased. Therefore, an object of the present invention is to realize a sheath material having sufficient mechanical strength to withstand the heavy working during wire drawing.
【０００５】[0005]
【課題を解決するための手段】本発明は、上記課題を解
決するために、超電導材料の線材加工に用いる超電導材
用シース材を、外側材をＣｕとし、内側材をＡｇまたは
Ａｇ合金とした複合材によるパイプとしたことを特徴と
する。According to the present invention, in order to solve the above problems, a sheath material for superconducting material used for processing a wire rod of a superconducting material is Cu as an outer material and Ag or Ag alloy as an inner material. The pipe is made of composite material.
【０００６】[0006]
【発明の実施の形態】以下に、本発明による超電導材用
シース材の実施の形態について説明する。図１は本発明
の実施の形態を示す斜視図、図２はシース材の製造方法
を示す説明図である。超電導材用シース材１は、外側材
２をＣｕとし、内側材３をＡｇとした複合材によるパイ
プである。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a sheath material for a superconducting material according to the present invention will be described below. FIG. 1 is a perspective view showing an embodiment of the present invention, and FIG. 2 is an explanatory view showing a method for manufacturing a sheath material. The superconducting sheath material 1 is a pipe made of a composite material in which the outer material 2 is Cu and the inner material 3 is Ag.
【０００７】４は酸化物系超電導材料であり、シース材
１の内部に充填されている。シース材１の製造は、例え
ば図２に示すように外側材２であるＣｕを材料としたパ
イプを製作し、その内径と嵌合する外径を有する内側材
３であるＡｇを材料とするパイプを製作する。その後こ
れらを嵌合させ所望の太さのパイプに伸線加工しシース
材１とする。Reference numeral 4 is an oxide superconducting material, which is filled inside the sheath material 1. The sheath material 1 is manufactured, for example, as shown in FIG. 2, by manufacturing a pipe made of Cu which is the outer material 2, and a pipe made of Ag which is the inner material 3 having an outer diameter that fits the inner diameter of the pipe. To produce. After that, these are fitted to each other and drawn into a pipe having a desired thickness to obtain a sheath material 1.
【０００８】外側材２と内側材３のパイプを製作する方
法は、塊状の素材を圧延または押出し成形する方法、板
状の素材を曲げ加工により略円形断面としてその合せ面
を鍛接または熔接等により接合する方法、幅の狭い板状
の素材をらせん状に成形しその合せ面を接合する方法、
実棒の内部を旋削等によってくり抜き成形する方法等が
ある。The method for producing the pipes of the outer member 2 and the inner member 3 includes a method of rolling or extruding a block-shaped material, a plate-shaped material having a substantially circular cross section by bending, and its mating surface being forged or welded. A method of joining, a method of forming a narrow plate-shaped material into a spiral shape and joining the mating surfaces,
There is a method of hollowing out the inside of the actual bar by turning or the like.
【０００９】複合材とする方法は、上記の如く各パイプ
を嵌合する方法の他に、板状のＣｕ材にめっき技術を用
いて両面または片面にＡｇめっきを施すか、または板状
のＣｕ材とＡｇ材を重ね合わせ圧接等によって複合材に
よる板材を成形し、これを上記と同様の方法でパイプ状
に成形する等の方法がある。以上のようにして得られた
複合材によるパイプを用いて超電導線材を製造する場合
は、複合材によるパイプ内に酸化物系超電導材料を充填
し、熱処理を施しながら段階的に伸線加工を行い所望の
外径、長さに成形し、酸化物系超電導材料の線材とす
る。In addition to the method of fitting the pipes as described above, the composite material may be formed by plating a plate-shaped Cu material with Ag plating on both sides or one side using a plating technique, or by plate-shaped Cu. There is a method in which a plate material made of a composite material is formed by superposing the material and the Ag material by pressure welding or the like, and forming this into a pipe shape by the same method as described above. When manufacturing a superconducting wire using the pipe made of the composite material obtained as described above, the oxide-based superconducting material is filled in the pipe made of the composite material, and wire drawing is performed stepwise while performing heat treatment. A wire rod made of an oxide-based superconducting material is formed by molding to a desired outer diameter and length.
【００１０】この超電導線材は、束ねるかまたはより合
せる等によって、例えば電力用ケーブルとして使用する
ことができる。上述した超電導材用シース材１の作用に
ついて説明する。本発明の超電導材用シース材１は、外
側材２をＣｕとし内側材３をＡｇとする複合材によるパ
イプであるため、内側材３であるＡｇが超電導材料であ
る酸化物との親和性を維持する。This superconducting wire can be used, for example, as a power cable by bundling or twisting. The operation of the above-described sheath material 1 for superconducting material will be described. Since the sheath material 1 for a superconducting material of the present invention is a pipe made of a composite material in which the outer material 2 is Cu and the inner material 3 is Ag, Ag which is the inner material 3 has an affinity with an oxide which is a superconducting material. maintain.
【００１１】また、外側材２であるＣｕは、室温状態で
の経時軟化現象が極めて緩やかであるため、酸化系超電
導材料の線材加工時の伸線加工に対して十分な機械的強
度を確保することができる。これによって、加工性に優
れた超電導材用のパイプ状のシース材１を得ることがで
きる。Further, since Cu, which is the outer material 2, has an extremely mild softening phenomenon with time at room temperature, it secures sufficient mechanical strength for wire drawing of the oxide superconducting material during wire processing. be able to. This makes it possible to obtain the pipe-shaped sheath material 1 for superconducting material, which is excellent in workability.
【００１２】以上のような本発明のシース材１の加工性
を調べるために、下記に示す試験を実施した。本発明の
シース材１の加工性を調べるために、Ｃｕを材料とした
外径５０ｍｍ、内径４０ｍｍ、長さ５００ｍｍのＣｕパ
イプに、Ａｇを材料とした外径４０ｍｍ、内径３０ｍ
ｍ、長さ５００ｍｍのＡｇパイプを嵌合させ、これを伸
線加工して外径２０ｍｍ、内径１６ｍｍ、肉厚２ｍｍの
パイプ状のシース材を製作した。In order to investigate the workability of the sheath material 1 of the present invention as described above, the following tests were carried out. In order to investigate the workability of the sheath material 1 of the present invention, a Cu pipe made of Cu and having an outer diameter of 50 mm, an inner diameter of 40 mm, and a length of 500 mm is used, and an Ag material is used as an outer diameter of 40 mm and an inner diameter of 30 m.
An Ag pipe having a length of m and a length of 500 mm was fitted and wire-drawn to produce a pipe-shaped sheath material having an outer diameter of 20 mm, an inner diameter of 16 mm and a wall thickness of 2 mm.
【００１３】また、比較のために、Ａｇを材料として外
径２０ｍｍ、内径１６ｍｍ、肉厚２ｍｍの従来例のパイ
プ状のシース材を製作した。このような両者にそれぞれ
酸化物系超電導材料を充填し、熱処理を施しながら段階
的に伸線加工を行い、外径０．５ｍｍの酸化物系超電導
材料の線材を製作した。For comparison, a conventional pipe-shaped sheath material having an outer diameter of 20 mm, an inner diameter of 16 mm and a wall thickness of 2 mm was manufactured using Ag as a material. An oxide-based superconducting material was filled in each of these two types, and wire drawing was performed stepwise while performing heat treatment to manufacture a wire rod of an oxide-based superconducting material having an outer diameter of 0.5 mm.
【００１４】この伸線加工時の加工性の指標を断線また
は亀裂の発生として、両者の加工性を比較した結果を表
１に示す。ここに、加工線径として示した、例えば２０
＞ｄ≧１０は、外径２０ｍｍの線材を外径１０ｍｍに伸
線加工する過程を示し、表中の回数を表す数字は、その
過程で発生した断線または亀裂の回数を示す。Table 1 shows the results of comparing the workability of the two with the wire breakage or crack occurrence as an index of the workability during the wire drawing. Shown here as the processed wire diameter, for example, 20
> D ≧ 10 indicates a process of wire drawing a wire having an outer diameter of 20 mm to an outer diameter of 10 mm, and the number indicating the number of times in the table indicates the number of wire breakages or cracks generated in the process.
【００１５】[0015]
【表１】 [Table 1]
【００１６】表１に示したように、本発明の超電導材用
シース材１は、伸線加工による亀裂や断線の発生がな
く、極めて良好な加工性を示した。なお、試料として用
いた本発明のパイプ状のシース材１は、ＣｕとＡｇの肉
厚がほぼ同等であるが、肉厚の比率としてはこの例に限
るものではない。以上は、内側材３をＡｇとして説明し
たが、０．２ｗｔ％Ｍｇ−Ａｇ合金等のＡｇ合金を内側
材３として用いても本発明の効果を損なうものではな
い。また、従来から用いられているＡｇ合金を内側材３
として用いても同様の効果が得られる。As shown in Table 1, the sheath material 1 for a superconducting material of the present invention did not cause cracks or disconnection due to wire drawing, and exhibited extremely good workability. Note that the pipe-shaped sheath material 1 of the present invention used as a sample has substantially the same thickness of Cu and Ag, but the thickness ratio is not limited to this example. Although the inner material 3 is described as Ag in the above, the effect of the present invention is not impaired even if an Ag alloy such as a 0.2 wt% Mg-Ag alloy is used as the inner material 3. In addition, the Ag alloy, which has been conventionally used, is used as the inner material 3
The same effect can be obtained when used as.
【００１７】更に、外側材２としてのＣｕも、Ｃｕとし
ての加工性を損なわない程度に添加元素を加えたＣｕ合
金であってもよい。Further, Cu as the outer material 2 may be a Cu alloy to which an additional element is added to the extent that the workability as Cu is not impaired.
【００１８】[0018]
【発明の効果】以上説明したように、本発明は、Ｃｕと
Ａｇの複合材によるパイプを超電導材用シース材とする
ことにより、内側に配置したＡｇによって酸化物系超電
導材料との親和性を維持しつつ、外側に配置したＣｕに
よって伸線加工時の強度を確保し、伸線加工時の強加工
に耐えるに十分な強度を有するようにしたため、シース
材の亀裂や断線等の発生を防止することができるという
効果が得られる。As described above, according to the present invention, by using a pipe made of a composite material of Cu and Ag as a sheath material for a superconducting material, Ag arranged inside has a high affinity with an oxide superconducting material. While maintaining it, the Cu placed outside secures the strength during wire drawing and has sufficient strength to withstand the heavy wire drawing, thus preventing the occurrence of cracks and wire breaks in the sheath material. The effect of being able to do is obtained.
【００１９】また、この結果、生産時の歩留まりが向上
し、伸線加工時に強加工が可能となるため、生産効率が
向上するばかりか、Ａｇの使用量を節約することがで
き、生産コストを低減できるという効果が得られる。Further, as a result, the yield at the time of production is improved, and the heavy working can be performed at the time of wire drawing, so that not only the production efficiency is improved, but also the amount of Ag used can be saved and the production cost can be reduced. The effect of reduction can be obtained.
【図１】本発明の実施の形態を示す斜視図FIG. 1 is a perspective view showing an embodiment of the present invention.
【図２】本発明の実施の形態のシース材製造方法を示す
説明図FIG. 2 is an explanatory view showing a sheath material manufacturing method according to an embodiment of the present invention.
１ シース材 ２ 外側材 ３ 内側材 ４ 酸化物系超電導材料 1 sheath material 2 outer material 3 Inner material 4 Oxide-based superconducting materials
Claims (6)
シース材において、 外側材をＣｕとし内側材をＡｇとした複合材によるパイ
プとすることを特徴とする超電導材用シース材。1. A sheath material for a superconducting material, which is a sheath material for a superconducting material used for processing a wire rod of a superconducting material, characterized in that it is a pipe made of a composite material in which an outer material is Cu and an inner material is Ag.
材用シース材。2. The sheath material for a superconducting material according to claim 1, wherein the inner material is an Ag alloy.
シース材の製造方法において、 Ｃｕを材料としたパイプの内側に、Ａｇを材料としたパ
イプを嵌合して、複合材のパイプとすることを特徴とす
る超電導材用シース材の製造方法。3. A method of manufacturing a sheath material for a superconducting material used for processing a wire rod of a superconducting material, wherein a pipe made of Ag is fitted inside a pipe made of Cu to obtain a composite pipe. A method of manufacturing a sheath material for a superconducting material, comprising:
としたパイプを嵌合することを特徴とする超電導材用シ
ース材の製造方法。4. The method for manufacturing a sheath material for a superconducting material according to claim 3, wherein a pipe made of Ag alloy is fitted inside the pipe made of Cu.
において、 超電導材料の周囲を、外側材をＣｕとし内側材をＡｇと
した複合材からなるシース材で覆ったことを特徴とする
超電導線材。5. A superconducting wire containing a superconducting material inside, wherein the periphery of the superconducting material is covered with a sheath material made of a composite material having Cu as an outer material and Ag as an inner material.
線材。6. The superconducting wire according to claim 5, wherein the inner material is an Ag alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001271136A JP2003086031A (en) | 2001-09-07 | 2001-09-07 | Sheath material for superconductive material, manufacturing method therefor and superconductive wire material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001271136A JP2003086031A (en) | 2001-09-07 | 2001-09-07 | Sheath material for superconductive material, manufacturing method therefor and superconductive wire material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003086031A true JP2003086031A (en) | 2003-03-20 |
Family
ID=19096682
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001271136A Pending JP2003086031A (en) | 2001-09-07 | 2001-09-07 | Sheath material for superconductive material, manufacturing method therefor and superconductive wire material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003086031A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6419611A (en) * | 1987-07-15 | 1989-01-23 | Hitachi Ltd | Superconductor |
| JPH01163910A (en) * | 1987-05-01 | 1989-06-28 | Sumitomo Electric Ind Ltd | Superconductive composite and its manufacture |
| JPH01194213A (en) * | 1988-01-27 | 1989-08-04 | Kobe Steel Ltd | Manufacture of complex oxide superconductive multi-core wire material |
| JPH028335A (en) * | 1988-06-28 | 1990-01-11 | Natl Res Inst For Metals | Sheath for manufacturing of oxide superconducting wire rod |
| JPH03165405A (en) * | 1989-11-24 | 1991-07-17 | Furukawa Electric Co Ltd:The | Manufacture of ceramics |
-
2001
- 2001-09-07 JP JP2001271136A patent/JP2003086031A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01163910A (en) * | 1987-05-01 | 1989-06-28 | Sumitomo Electric Ind Ltd | Superconductive composite and its manufacture |
| JPS6419611A (en) * | 1987-07-15 | 1989-01-23 | Hitachi Ltd | Superconductor |
| JPH01194213A (en) * | 1988-01-27 | 1989-08-04 | Kobe Steel Ltd | Manufacture of complex oxide superconductive multi-core wire material |
| JPH028335A (en) * | 1988-06-28 | 1990-01-11 | Natl Res Inst For Metals | Sheath for manufacturing of oxide superconducting wire rod |
| JPH03165405A (en) * | 1989-11-24 | 1991-07-17 | Furukawa Electric Co Ltd:The | Manufacture of ceramics |
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