JPS63102115A - Manufacture of superconductive alloy wire material - Google Patents
Manufacture of superconductive alloy wire materialInfo
- Publication number
- JPS63102115A JPS63102115A JP61246703A JP24670386A JPS63102115A JP S63102115 A JPS63102115 A JP S63102115A JP 61246703 A JP61246703 A JP 61246703A JP 24670386 A JP24670386 A JP 24670386A JP S63102115 A JPS63102115 A JP S63102115A
- Authority
- JP
- Japan
- Prior art keywords
- alloy
- wire
- copper
- superconducting
- manufacturing
- 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
- 239000000956 alloy Substances 0.000 title claims description 61
- 229910045601 alloy Inorganic materials 0.000 title claims description 52
- 238000004519 manufacturing process Methods 0.000 title claims description 24
- 239000000463 material Substances 0.000 title claims description 14
- 229910020012 Nb—Ti Inorganic materials 0.000 claims description 49
- 239000010949 copper Substances 0.000 claims description 41
- 229910052802 copper Inorganic materials 0.000 claims description 39
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 36
- 238000000034 method Methods 0.000 claims description 22
- 239000002131 composite material Substances 0.000 claims description 14
- 239000002184 metal Substances 0.000 claims description 14
- 229910052751 metal Inorganic materials 0.000 claims description 14
- 229910001281 superconducting alloy Inorganic materials 0.000 claims description 13
- 230000015572 biosynthetic process Effects 0.000 claims description 9
- 238000000576 coating method Methods 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims description 8
- 238000007747 plating Methods 0.000 claims description 7
- 229910052758 niobium Inorganic materials 0.000 claims description 4
- 229910052804 chromium Inorganic materials 0.000 claims description 3
- 230000000087 stabilizing effect Effects 0.000 claims description 3
- 229910052715 tantalum Inorganic materials 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 description 9
- 239000010959 steel Substances 0.000 description 9
- 229910000765 intermetallic Inorganic materials 0.000 description 7
- 229910001069 Ti alloy Inorganic materials 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 6
- 238000009792 diffusion process Methods 0.000 description 5
- 238000011946 reduction process Methods 0.000 description 5
- 238000001125 extrusion Methods 0.000 description 4
- 229910002482 Cu–Ni Inorganic materials 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 229910001362 Ta alloys Inorganic materials 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910017604 nitric acid Inorganic materials 0.000 description 2
- 238000005491 wire drawing Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 238000001192 hot extrusion Methods 0.000 description 1
- 238000005339 levitation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000002887 superconductor Substances 0.000 description 1
- 238000007740 vapor deposition 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) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は極低温において、電気抵抗を零にして電流を
流すことのできる超電導合金線材の製造方法に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for manufacturing a superconducting alloy wire that can conduct current with zero electrical resistance at extremely low temperatures.
超電導線は安定した働きをなすために、電気抵抗の低い
常電導性金属例えば無酸素胴中に、多数の非常に細いフ
ィラメント、例えば直径４０μｍ以下のＮｂ−Ｔｉ合金
フィラメントを埋め込み、さらにこのような複合線にツ
イスト加工を施したいわゆる極細多心ツイスト超電導線
の形に製作され、使用される。In order for superconducting wires to work stably, many very thin filaments, such as Nb-Ti alloy filaments with a diameter of 40 μm or less, are embedded in a normal conductive metal with low electrical resistance, such as an oxygen-free shell, and such It is produced and used in the form of so-called ultra-fine multi-core twisted superconducting wire, which is a composite wire that is twisted.
第２図はこのようなＮｂ−Ｔｉ合金極細多心ツイスト超
電導線の一例を示す電断面図である６図において、（１
）はＮｂ−Ｔｉ合金フィラメント、（２）は無酸素銅な
どの常電導性金属で、これらにより複合線であるＮｂ−
Ｔｉ合金極細多心超電導線（３）が形成されている。
Ｎｂ−Ｔｉ合金極細多心超電導線（３）はその全長にわ
たって、第２図に示す一様な横断面を有するものである
。FIG. 2 is an electrical cross-sectional view showing an example of such a Nb-Ti alloy ultrafine multi-core twisted superconducting wire.
) is an Nb-Ti alloy filament, and (2) is a normal conductive metal such as oxygen-free copper, which makes the composite wire Nb-
A Ti alloy ultrafine multicore superconducting wire (3) is formed.
The Nb-Ti alloy ultrafine multicore superconducting wire (3) has a uniform cross section over its entire length as shown in FIG.
このような超電導線（３）を製造するには、一般に次の
ような方法が採られる。すなわち銅パイプを洗浄して、
その中に１本のＮｂ−Ｔｉ合金棒を挿入する。これを引
抜加工すると銅を被覆したＮｂ−Ｔｉ合金単心線材とな
る。この銅被覆Ｎｂ−Ｔｉ合金単心線材の多数本を大き
な径の銅パイプの中に整列して挿入して得られる線材束
の両端面に先端部材および後端部材として、多くは銅板
を溶接して、押出し用ビレットとする。そしてこのビレ
ットを押出し加工して複合線とし、さらにこれをスェー
ジング、圧延、伸線などの加工により断面縮小加工し、
断面縮小加工工程中または加工工程後に２５０〜５００
℃の熱処理を施し、所定の形状に仕上げる。In order to manufacture such a superconducting wire (3), the following method is generally adopted. i.e. cleaning copper pipes,
One Nb-Ti alloy rod is inserted into it. When this is drawn, it becomes a copper-coated Nb-Ti alloy single-core wire. A large number of copper-coated Nb-Ti alloy single-core wires are aligned and inserted into a large-diameter copper pipe, and a copper plate is often welded to both end faces of the wire bundle as a tip member and a rear end member. and make a billet for extrusion. This billet is then extruded into a composite wire, which is then processed to reduce its cross section by swaging, rolling, wire drawing, etc.
250-500 during or after the cross-section reduction process
It is heat treated at ℃ and finished into the desired shape.
押出し加工は多心線の製造において、特に銅と銅を接合
するために重要な工程であり、また断面縮小加工工程中
または加工工程後の熱処理は高い電流特性を保持するた
めに必須の工程である。Extrusion is an important process in the production of multi-filament wires, especially for bonding copper to copper, and heat treatment during or after the cross-section reduction process is an essential process to maintain high current characteristics. be.
上記のようにして製造されたＮｂ−Ｔｉ合金線材は所定
の電流容量に対応するため、一本または複数本による複
合線とされ、コイルに巻回される。上記の線材は超電導
合金線材であって、液体ヘリウムによって極低温まで冷
却すると、電気抵抗零の°状態となって、大電流を流す
ことができるようになり、核融合、加速器、磁気共鳴医
療用診断装置、超電導磁気浮上列車などの強磁場発生電
磁石に使用される。The Nb-Ti alloy wire manufactured as described above is made into a composite wire of one or more wires and wound into a coil in order to correspond to a predetermined current capacity. The above wire is a superconducting alloy wire, and when cooled to an extremely low temperature with liquid helium, it becomes a state of zero electrical resistance and can carry a large current, making it suitable for nuclear fusion, accelerators, and magnetic resonance medical applications. Used in electromagnets that generate strong magnetic fields such as diagnostic equipment and superconducting magnetic levitation trains.
しかるに上記Ｎｂ−Ｔｉ系合金超電導線材の製造方法に
おいては、摂氏数百度における熱間押出し加工等の断面
縮小加工工程、ならびに断面縮小加工工程中または加工
工程後の２５０〜５００℃の熱処理工程において、Ｎｂ
−Ｔｉ系合金中のＴ１とマトリックスのＣｕとが拡散反
応を起し、Ｎｂ−Ｔｉ系合金フィラメントと安定化銅の
界面にＣｕＴｉｍ属間化合物を形成する。However, in the method for manufacturing the Nb-Ti alloy superconducting wire, in the cross-section reduction process such as hot extrusion at several hundred degrees Celsius, and the heat treatment process at 250 to 500 °C during or after the cross-section reduction process, Nb
- T1 in the Ti-based alloy and Cu in the matrix cause a diffusion reaction to form a CuTi intermetallic compound at the interface between the Nb-Ti-based alloy filament and the stabilized copper.
この化合物が一旦フィラメント径に近い大きさに形成さ
れた場合には、断面縮小工程においてフィラメントの断
線もしくは線材自身の断線を惹き起こし、ひいては臨界
電流値の減少をもたらす原因となる。特にフィラメント
径が数μ以下の線材では、ＣｕＴｉ化合物の形成の有無
が線材の伸線性に多大な影響を及ぼすことになるという
問題点があった。Once this compound is formed to a size close to the diameter of the filament, it causes breakage of the filament or breakage of the wire itself in the cross-section reduction process, which in turn causes a decrease in the critical current value. Particularly in the case of wire rods having a filament diameter of several micrometers or less, there is a problem in that the presence or absence of the formation of a CuTi compound has a great effect on the drawability of the wire rod.
この発明は上記の問題点を解決するためになされたもの
で、Ｎｂ−Ｔｉ系合金超電導線材の製造工程中において
、Ｎｂ−Ｔｉ系合金と安定化材としての銅との界面にお
けるＣｕＴｉ金属間化合物の形成を防止し、これにより
フィラメントまたは線材の断線を防止し、電流特性の優
れた超電導合金線材を得ることができる超電導合金線材
の製造方法を提案することを目的としている。This invention was made in order to solve the above-mentioned problems, and during the manufacturing process of Nb-Ti alloy superconducting wire, CuTi intermetallic compound is removed at the interface between the Nb-Ti alloy and copper as a stabilizing material. The purpose of the present invention is to propose a method for manufacturing a superconducting alloy wire that can prevent the formation of a superconducting alloy wire, thereby preventing the filament or wire from breaking, and obtain a superconducting alloy wire with excellent current characteristics.
この発明の超電導合金線材の製造方法は、超電導合金と
してのＮｂ−Ｔｉ系合金および安定化材としての銅を並
設し、この複合体を断面縮小加工する工程と、断面縮小
加工工程中または加工工程後に熱処理する工程からなる
Ｎｂ−Ｔｉ系合金超電導線材の製造方法において、Ｎｂ
−Ｔｉ系合金に接する銅の表面に予め金属被膜生成処理
を施して、Ｎｂ −Ｔｉ系合金と銅を並設し断面縮小加
工する方法である。The method for producing a superconducting alloy wire of the present invention includes the steps of arranging a Nb-Ti alloy as a superconducting alloy and copper as a stabilizing material in parallel, and reducing the cross section of this composite, and during the cross-sectional reducing step or during the processing. In a method for manufacturing a Nb-Ti alloy superconducting wire comprising a step of heat treatment after the step, Nb
This is a method in which the surface of the copper that is in contact with the -Ti alloy is previously subjected to a metal film formation treatment, and the Nb -Ti alloy and the copper are placed side by side and the cross section is reduced.
第１図はこの発明の一実施態様を示すＮｂ−Ｔｉ系合金
超電導線の製造初期段階の横断面図であり、図において
、（４）はＮｂ−Ｔｉ合金棒等のＮｂ−Ｔｉ系合金材、
（５）はこのＮｂ−Ｔｉ系合金材（４）を挿入する銅パ
イプ等の鋼材、（６）はこの鋼材（５）のＮｂ−Ｔｉ系
合金材（４）と接する面に形成された金属被膜、（７）
はこれらの複合材である。FIG. 1 is a cross-sectional view of an Nb-Ti alloy superconducting wire showing an embodiment of the present invention at an early stage of manufacturing. In the figure, (4) is a Nb-Ti alloy material such as an Nb-Ti alloy rod. ,
(5) is a steel material such as a copper pipe into which this Nb-Ti alloy material (4) is inserted, and (6) is a metal formed on the surface of this steel material (5) that is in contact with the Nb-Ti alloy material (4). coating, (7)
is a composite of these materials.
本発明では第１図に示すように、Ｎｂ−Ｔｉ系合金超電
導線材の製造工程における最初の段階において、銅パイ
プ等の鋼材（５）のＮｂ−Ｔｉ系合金材（４）と接する
内面に予め金属被膜（６）を生成させ、これにより後の
加熱工程におけるＮｂ−Ｔｉ系合金材（４）中のＴｉと
Ｃｕの界面拡散反応を防止し、ＣｕＴｉ金属間化合物の
形成を抑制して、Ｎｂ−Ｔｉ系合金超電導線材の伸線加
工性を改善し、臨界電流低下を防止する。In the present invention, as shown in FIG. 1, in the first stage of the manufacturing process of Nb-Ti alloy superconducting wire, the inner surface of the steel material (5) such as a copper pipe, which is in contact with the Nb-Ti alloy material (4), is A metal coating (6) is formed, which prevents the interfacial diffusion reaction between Ti and Cu in the Nb-Ti alloy material (4) in the subsequent heating process, suppresses the formation of CuTi intermetallic compounds, and - Improve the wire drawability of Ti-based alloy superconducting wire and prevent a decrease in critical current.
Ｎｂ −Ｔｉ系合金はＮｂおよびＴｉを必須成分とする
合金であって、他の成分を含んでいてもよく、Ｎｂ−Ｔ
ｉ合金、Ｎｂ−Ｔｉ−Ｔａ合金などがある。金属被膜（
６）としては、 Ｎｂ−Ｔｉ系合金材（４）と鋼材（５
）を隔離して、ＴｉとＣｕの界面拡散反応を防止できる
ものであればよいが、Ｎｉ、 Ｃｒ、 ＮｂまたはＴａ
被膜が好ましい。Nb-Ti alloy is an alloy containing Nb and Ti as essential components, and may contain other components.
i alloy, Nb-Ti-Ta alloy, etc. Metal coating (
6), Nb-Ti alloy material (4) and steel material (5).
) can be used as long as it can prevent the interfacial diffusion reaction between Ti and Cu, but Ni, Cr, Nb or Ta can be used.
A coating is preferred.
以後の製造方法は従来と同様であり、第１図の複合材（
７）を引抜加工して銅被覆Ｎｂ−Ｔｉ系合金単心線材と
し、その多数本を大径の銅パイプの中に整列挿入して押
出し用ビレットを形成し、これを押出し加工ならびにス
ェージング、圧延、伸線などの断面縮小加工を施し、断
面縮小加工工程中または加工工程後に例えば２５０〜５
００℃の熱処理を施し、所定の形状に仕上げ、第２図と
同様の超電導、ＩｊＩ（３）を製造する。The subsequent manufacturing method is the same as the conventional method, and the composite material shown in Figure 1 (
7) is drawn into copper-coated Nb-Ti alloy single-core wire rods, a large number of which are aligned and inserted into a large-diameter copper pipe to form a billet for extrusion, which is extruded, swaged, and rolled. , subjected to cross-section reduction processing such as wire drawing, and the cross-section reduction processing process or after the processing process is performed to
A heat treatment is performed at 00° C. to finish it into a predetermined shape, and a superconductor IjI (3) similar to that shown in FIG. 2 is manufactured.
この発明の超電導合金線材の製造方法においては、Ｎｂ
−Ｔｘ系合金超電導線製造の最初の段階で、鋼材（５）
のＮｂ−Ｔｉ系合金材（４）と接する面に金属被膜（６
）を存在させるため、鋼材（５）とＮｂ−Ｔｉ系合金材
（４）の直接接触を防止し、これによりＴｉとＣｕとの
界面拡散反応を防止し、有害となるＮｂ −Ｔｉ合金フ
ィラメント上のＣｕＴｉ金属間化合物の形成を抑制する
。In the method for manufacturing a superconducting alloy wire of this invention, Nb
-In the first stage of manufacturing Tx alloy superconducting wire, steel material (5)
A metal coating (6) is applied to the surface in contact with the Nb-Ti alloy material (4).
), this prevents direct contact between the steel material (5) and the Nb-Ti alloy material (4), thereby preventing the interfacial diffusion reaction between Ti and Cu, which would otherwise be harmful to the Nb-Ti alloy filament. The formation of CuTi intermetallic compounds is suppressed.
以下、この発明を実施例について説明する。 Hereinafter, this invention will be explained with reference to examples.
外径７．３ｍｍ、内径５．３１１１ｍの銅パイプを硝酸
および硫酸溶液に浸漬して表面を清浄化し、乾燥した。A copper pipe with an outer diameter of 7.3 mm and an inner diameter of 5.3111 m was immersed in a nitric acid and sulfuric acid solution to clean the surface and then dried.
銅パイプの外面に不着処理を行ってＮｉ電気メツキ液に
浸漬し、銅パイプ内のメッキ液を循環させながら、銅パ
イプ内にＮｉメッキを施したＩＩＮＩメッキ層の厚さを
３．０μ醜とし、銅パイプをメッキ槽から取り出した後
、充分に乾燥した。このパイプの中に直径５．０ｍｍの
表面清浄化したＮｂ−Ｔｉ合金棒を挿入し、その後一体
として冷間引抜加工を行い、対辺距離６■の六角線とし
た。六角線に直線矯正加工を施して真直性を付与し、一
定の長さに切断した。The outer surface of the copper pipe was subjected to non-adhesive treatment and immersed in a Ni electroplating solution, and while the plating solution inside the copper pipe was circulated, the thickness of the IINI plating layer, which was Ni-plated inside the copper pipe, was set to 3.0 μm. After taking out the copper pipe from the plating bath, it was thoroughly dried. A surface-cleaned Nb-Ti alloy rod with a diameter of 5.0 mm was inserted into this pipe, and then cold-drawn as one piece to form a hexagonal wire with a distance across flats of 6 square inches. The hexagonal wire was straightened to give it straightness, and then cut to a certain length.
それらの多数を外径１４０ｍｍの銅容器中に整列して挿
入し、前後端部に銅部材をあてがった。その後あてがっ
た２カ所の接続部に電子ビームを照射し゛Ｃ密封溶接し
、押出し用複合ビレットを製作した。A large number of them were aligned and inserted into a copper container having an outer diameter of 140 mm, and copper members were applied to the front and rear ends. Thereafter, the two applied joints were irradiated with an electron beam and sealed welded, producing a composite billet for extrusion.
次に複合ビレットを約５８０℃に加熱し、熱間押出し加
工により直径４０ｍｍの複合棒とし、それから引抜加工
を施した。引抜加工の途中で３９０℃Ｘ２０１１の熱処
理を２回行って、線径０．１ｍｍのＮｂ−Ｔｉ合金超電
導線とした。この線材は引抜工程中断線を生ずることが
なく、容易に加工を進めることができた。Next, the composite billet was heated to about 580° C. and hot extruded into a composite rod having a diameter of 40 mm, which was then subjected to drawing. During the drawing process, heat treatment at 390°C x 2011 was performed twice to obtain a Nb-Ti alloy superconducting wire with a wire diameter of 0.1 mm. This wire did not cause any interruption lines during the drawing process, and could be easily processed.
この線材の胴部分を硝酸等の酸により溶解除去し、走査
型電子顕微鏡によりフィラメントの表面を観察した。Ｎ
ｂ −Ｔｉ合金フィラメント表面にはＣｕＴｉ金属間化
合物等の異物は認められず、また異常に太い部分、およ
び細い部分も認められなかった。The body portion of this wire was dissolved and removed using an acid such as nitric acid, and the surface of the filament was observed using a scanning electron microscope. N
No foreign matter such as a CuTi intermetallic compound was observed on the surface of the b-Ti alloy filament, and no abnormally thick or thin portions were observed.
上記の工程により製作したＮｂ−Ｔｉ合金線材の臨界電
流密度を測定したところ、４．２°Ｋにおいて５Ｔの磁
界下で２７０ＯＡ／ｎ＋＋１１”、７Ｔの磁界下で１７
０ＯＡ／ａｍ”の非常に良好な電流特性が得られた。The critical current density of the Nb-Ti alloy wire manufactured by the above process was measured and found to be 270OA/n++11" under a 5T magnetic field and 17" under a 7T magnetic field at 4.2°K.
Very good current characteristics of 0OA/am'' were obtained.
なお、上記実施例では、Ｎｂ−Ｔｉ系合金線材の製造工
程の初期において、銅パイプの内面にＮｉ被膜を形成さ
せ、銅とＮｂ−Ｔｉ合金とを隔離したが。In the above example, a Ni film was formed on the inner surface of the copper pipe to isolate the copper and the Nb-Ti alloy at the initial stage of the manufacturing process of the Nb-Ti alloy wire.
Ｎｉ以外の金属被膜、特に拡散速度のおそいＮｂ、 Ｔ
ａ。Metal coatings other than Ni, especially Nb and T, which have a slow diffusion rate
a.
Ｃｒ等からなる被膜によっても両者を隔離することがで
き、ＣｕＴｉ金属間化合物の生成防止に有効である。こ
こでメッキ層が銅およびＮｂ−Ｔｉ合金と同時に塑性変
形できると好ましい。A film made of Cr or the like can also isolate the two, and is effective in preventing the formation of CuTi intermetallic compounds. Here, it is preferable that the plating layer can be plastically deformed simultaneously with the copper and the Nb-Ti alloy.
上記実施例では銅パイプの内面にＮｉ被膜を生成させる
ために、一般的に用いられるメッキ法による場合につい
て述べたが、メッキ法のほかにＣＶＤ、スパッター、蒸
着など、他の付着方法によっても有効である。このこと
はＮｂ、 Ｔａ、 Ｃｒ等の他の被膜を生成させる場合
も同様である。In the above example, a commonly used plating method was used to generate a Ni film on the inner surface of a copper pipe, but in addition to the plating method, other deposition methods such as CVD, sputtering, and vapor deposition are also effective. It is. This also applies to the formation of other films such as Nb, Ta, and Cr.
以上の説明はすべて銅とＮｂ−Ｔｉ合金から成る超電導
線の場合について述べてきたが、例えばパルス用Ｎｂ−
Ｔｉ合金超電導線のように、Ｃｕ−Ｎｉ合金を含んだ３
Ｊｌｌ！１Ｎｂ−Ｔｉ合金超電導線の場合でも、銅また
はＣｕ−Ｎｉ合金とＮｂ−Ｔｉ合金が直接に接触するの
で、この場合でも本発明は有効である。また上記実施例
では、超電導合金としてＮｂ−Ｔｉ合金の場合について
述べたが、Ｎｂ−Ｔｉ−Ｔａ合金など、他のＮｂ−Ｔｉ
系合金超電導線の製造の場合にも広く適用できる。All of the above explanations have been made regarding the case of superconducting wires made of copper and Nb-Ti alloy.
3 containing Cu-Ni alloy, such as Ti alloy superconducting wire.
Jll! Even in the case of a 1Nb-Ti alloy superconducting wire, the copper or Cu-Ni alloy and the Nb-Ti alloy are in direct contact, so the present invention is also effective in this case. Furthermore, in the above embodiments, the case of Nb-Ti alloy was described as the superconducting alloy, but other Nb-Ti alloys such as Nb-Ti-Ta alloy
It can also be widely applied to the production of alloy superconducting wires.
さらに上記実施例では、銅パイプとＮｂ−Ｔｉ合金棒を
組み合せて引抜加工等をする場合について述べたが、鋼
材の形状はパイプに限定されるものではなく、テープ等
を加工して複合棒としてもよく、同様にＮｂ−Ｔｉ合金
棒に接する銅の表面に金属被膜生成処理を施せば目的は
達せられる。Furthermore, in the above example, a case was described in which a copper pipe and a Nb-Ti alloy rod were combined and subjected to drawing processing, etc., but the shape of the steel material is not limited to a pipe, and a tape or the like is processed to form a composite rod. The purpose can also be achieved by similarly applying a metal film forming treatment to the surface of the copper that is in contact with the Nb-Ti alloy rod.
以上のようにこの発明によれば、Ｎｂ−Ｔｉ系合金超電
導線の製造工程の初期において、単心線を構成する鋼材
に金属被膜を形成しておくことにより、後の工程でＣｕ
Ｔｉ金属間化合物の形成が防止され、これにより数μ■
以下の直径のＮｂ−Ｔｉ合金フィラメントを含む線材の
製造の場合でも、引抜加工中に線材が断線することがな
く、また製造された線材におけるＮｂ−Ｔｉ系合金フィ
ラメントの断線もなく、かつＮｂ−Ｔｉ系合金フィラメ
ントの直径のバラツキも生じないため、電流特性の優れ
た超電導合金線材を得ることができる。As described above, according to the present invention, by forming a metal coating on the steel material constituting the single-filament wire at the initial stage of the manufacturing process of Nb-Ti alloy superconducting wire, Cu
The formation of Ti intermetallic compounds is prevented, which reduces the
Even in the case of manufacturing wire rods containing Nb-Ti alloy filaments with the following diameters, the wire rods do not break during the drawing process, and the Nb-Ti alloy filaments in the manufactured wire rods do not break. Since there is no variation in the diameter of the Ti-based alloy filaments, it is possible to obtain a superconducting alloy wire with excellent current characteristics.
第１図はこの発明の一実施態様を示すＮｂ−Ｔｉ系合金
超電導線の製造初期段階の横断面図、第２図は極細多心
超電導線の横断面図である。
図において、（１）はＮｂ−Ｔｉ合金フィラメント、（
２）は常電導性金属、（３）は超電導線、（４）はＮｂ
−Ｔｉ系合金材、（５）は鋼材、（６）は金属被膜、（
７）は複合材である。FIG. 1 is a cross-sectional view of an Nb-Ti alloy superconducting wire at an early stage of manufacturing, showing one embodiment of the present invention, and FIG. 2 is a cross-sectional view of an ultrafine multicore superconducting wire. In the figure, (1) is a Nb-Ti alloy filament, (
2) is a normal conductive metal, (3) is a superconducting wire, and (4) is Nb.
-Ti-based alloy material, (5) is steel material, (6) is metal coating, (
7) is a composite material.
Claims (3)
化材としての銅を並設し、この複合体を断面縮小加工す
る工程と、断面縮小加工工程中または加工工程後に熱処
理する工程からなるＮｂ−Ｔｉ系合金超電導線材の製造
方法において、Ｎｂ−Ｔｉ系合金に接する銅の表面に予
め金属被膜生成処理を施して、Ｎｂ−Ｔｉ系合金と銅を
並設することを特徴とする超電導合金線材の製造方法。(1) A process of arranging a Nb-Ti alloy as a superconducting alloy and copper as a stabilizing material in parallel, reducing the cross-section of this composite, and heat-treating the composite during or after the process. - A method for producing a Ti-based alloy superconducting wire, characterized in that the surface of the copper in contact with the Nb-Ti-based alloy is previously subjected to a metal film formation treatment, and the Nb-Ti-based alloy and copper are arranged side by side. manufacturing method.
Ｃｒ、ＮｂまたはＴａ被膜生成処理を施すことを特徴と
する特許請求の範囲第１項記載の超電導合金線材の製造
方法。(2) Ni is added to the surface of the copper in contact with the Nb-Ti alloy in advance.
The method for manufacturing a superconducting alloy wire according to claim 1, characterized in that a Cr, Nb or Ta film forming treatment is performed.
る特許請求の範囲第１項または第２項記載の超電導合金
線材の製造方法。(3) The method for manufacturing a superconducting alloy wire according to claim 1 or 2, wherein the metal coating forming treatment is plating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61246703A JPS63102115A (en) | 1986-10-17 | 1986-10-17 | Manufacture of superconductive alloy wire material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61246703A JPS63102115A (en) | 1986-10-17 | 1986-10-17 | Manufacture of superconductive alloy wire material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63102115A true JPS63102115A (en) | 1988-05-07 |
Family
ID=17152378
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61246703A Pending JPS63102115A (en) | 1986-10-17 | 1986-10-17 | Manufacture of superconductive alloy wire material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63102115A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH025311A (en) * | 1988-06-23 | 1990-01-10 | Sumitomo Electric Ind Ltd | Superconductive wire rod |
| JP2007000875A (en) * | 2005-06-21 | 2007-01-11 | Hitachi Ltd | Method for joining metal surfaces |
-
1986
- 1986-10-17 JP JP61246703A patent/JPS63102115A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH025311A (en) * | 1988-06-23 | 1990-01-10 | Sumitomo Electric Ind Ltd | Superconductive wire rod |
| JP2007000875A (en) * | 2005-06-21 | 2007-01-11 | Hitachi Ltd | Method for joining metal surfaces |
| JP4533254B2 (en) * | 2005-06-21 | 2010-09-01 | 株式会社日立製作所 | Metal surface joining method |
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