JPS63150814A - Manufacture of nb-ti based fine multi-core superconductor - Google Patents
Manufacture of nb-ti based fine multi-core superconductorInfo
- Publication number
- JPS63150814A JPS63150814A JP29849586A JP29849586A JPS63150814A JP S63150814 A JPS63150814 A JP S63150814A JP 29849586 A JP29849586 A JP 29849586A JP 29849586 A JP29849586 A JP 29849586A JP S63150814 A JPS63150814 A JP S63150814A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- heat treatment
- superconducting
- critical current
- current density
- 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
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 239000002887 superconductor Substances 0.000 title description 3
- 238000010438 heat treatment Methods 0.000 claims description 18
- 230000032683 aging Effects 0.000 claims description 13
- 238000005482 strain hardening Methods 0.000 claims description 8
- 239000004020 conductor Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 238000001192 hot extrusion Methods 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 229910001069 Ti alloy Inorganic materials 0.000 claims 1
- 150000001875 compounds Chemical class 0.000 description 5
- 239000000956 alloy Substances 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Landscapes
- Extrusion Of Metal (AREA)
- 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】
〈産業上の利用分野〉
この発明は超電導マグネット等に用いられる隆−Ｔｉ系
極細多芯超電導導体の製造方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION <Industrial Field of Application> The present invention relates to a method for manufacturing an ultra-fine multicore superconducting conductor of Ryu-Ti system used in superconducting magnets and the like.
〈従来の技術〉
従来、陽−Ｔ、系極細多芯超電４導体を製造する場合、
臨界電流密度を高くするために熱間押出温度を約５００
℃以下のできるだけ低い温度で行ない、芯線断線や臨界
電流密度を低下させる原因となる（ａ Ｔ、化合物の
生成を抑え、３００℃〜５００℃の温度で０．５〜１０
０時間の熱処理と断面減少率１０％以上の冷間加工を１
〜数回繰返し、臨界電流密度の向上を行なっていた。<Conventional technology> Conventionally, when manufacturing positive-T, ultrafine multicore superconductor 4 conductors,
In order to increase the critical current density, the hot extrusion temperature was adjusted to about 500℃.
The temperature should be as low as possible (below 300°C to 500°C, to prevent the core wire from breaking or reducing the critical current density).
Heat treatment for 0 hours and cold working with a cross-section reduction rate of 10% or more
The critical current density was improved several times.
〈発明が解決しようとする問題点〉
隆−−系合金の磁束のビン止め中心となるα−１５粒子
が最適析出するような条件の熱処理を行なうと基材の銅
とＮｂ Ｔｉ中のＴｉが反応し、ＱＬ−Ｔｉ化合物を
生成する。<Problems to be Solved by the Invention> When heat treatment is performed under conditions such that α-15 particles, which are the center of magnetic flux binding in a ridge-based alloy, are optimally precipitated, the Ti in the base material copper and Nb react to produce a QL-Ti compound.
ＣＩＬ −Ｔｉ化合物は硬くて脆く時効後の冷間加工時
にＮｏ− Ｔｉ芯線の断線を起こり易くするうえ、有効
なＩ’４ ”ｒ、ｌ！ｌｉ面積を減少するため臨界電
流値を低下させる原因となる。そのため臨界電流密度を
向上させるには熱間押出時にできる限り、熱履歴を少な
くして化合物の生成を押さえ、その後の時効熱処理と冷
間加工の繰返しを行なう必要があった。The CIL-Ti compound is hard and brittle, which makes the No-Ti core wire more likely to break during cold working after aging, and also reduces the effective I'4''r,l!li area, which causes a decrease in the critical current value. Therefore, in order to improve the critical current density, it was necessary to minimize the thermal history during hot extrusion to suppress the formation of compounds, and then repeat the aging heat treatment and cold working.
しかしこの方法では１回の時効熱処理では大した臨界電
流密度の向上が望めず、２回以上の時効熱処理が必要で
あった。また臨界電流密度を最適化するためには高磁界
はど最終時効からの断面減少率を大きくする必要があり
、時効時の超電導線の線径が大きくなり、大きな熱処理
炉が必要となったり、取扱いが困難になったりしていた
。However, with this method, a significant improvement in critical current density cannot be expected with one aging heat treatment, and two or more aging heat treatments are required. In addition, in order to optimize the critical current density, it is necessary to increase the area reduction rate after final aging using a high magnetic field, which increases the wire diameter of the superconducting wire during aging and requires a large heat treatment furnace. It became difficult to handle.
〈問題点を解決するための手段〉
この発明は上記の点に鑑みて検討の結果、得られたもの
で、ｍ −Ｔ、系合金からなる芯線の複数本を銅基材中
に埋め込んだ複合超電導ビレットを６００℃以上７００
℃以下の温度で０．２〜３０時間加熱した後、５４０℃
以上６００℃以下の温度で熱間押出加工し、断面減少率
８０％以上の冷間加工を加え、さらに時効熱処理した後
、断面減少率３０％以上の冷間加工を加えて目的とする
寸法の多芯超電導導体を得ることを特徴とするものであ
る。<Means for solving the problems> This invention was obtained as a result of studies in view of the above points, and is a composite material in which a plurality of core wires made of m-T alloy are embedded in a copper base material. Superconducting billet heated to 600°C or higher 700°C
After heating at a temperature below ℃ for 0.2 to 30 hours, 540℃
After hot extrusion processing at a temperature of 600℃ or less, cold working with a reduction in area of 80% or more, aging heat treatment, and cold working with a reduction in area of 30% or more, the desired dimensions are obtained. This method is characterized by obtaining a multicore superconducting conductor.
〈作用〉
この発明において、掻−下、系合金からなる芯線の複数
本を銅基材中に埋め込んだ複合超電導ビレットを６００
℃以上７００℃以下の温度で０．２〜３０時間加熱する
のは、所定の温度に大単重のビレット全体を均一な温度
分布にするためであり、その温度は充分なα−Ｔ、粒子
を析出させるのに最適な温度で、それ以下では析出が不
完全になり、ＱＬ −Ｔｉ化合物を生成させるだけであ
り、逆にそれ以上ではα−Ｔ１粒子が租大化するうえ、
−一Ｔｉ化合物が許容範囲を越えるからである。また、
熱間押出しを５４０℃以上６００℃以下で行なうのは押
出時に受ける加工発熱による温度上昇で７００℃以上に
なることを防ぐためである。<Function> In the present invention, a composite superconducting billet in which a plurality of core wires made of a base alloy are embedded in a copper base material is made of 600
The reason for heating for 0.2 to 30 hours at a temperature of ℃ to 700℃ is to uniformly distribute the temperature of the entire large unit weight billet to a predetermined temperature. This is the optimum temperature to precipitate. Below this temperature, the precipitation will be incomplete and only QL-Ti compounds will be produced. On the other hand, above this temperature, the α-T1 particles will become large and
-Ti compound exceeds the permissible range. Also,
The reason why the hot extrusion is carried out at a temperature of 540° C. or higher and 600° C. or lower is to prevent the temperature from rising to 700° C. or higher due to heat generated during extrusion.
この発明では従来の多段熱処理の１段目の熱処理による
効果を熱間押出時に与えることを特徴とするものであり
、これによってその後の加工度を充分にとれるうえ、従
来より少ない熱処理で同様の結果を得ることができる。This invention is characterized in that the effect of the first stage heat treatment of conventional multi-stage heat treatment is imparted during hot extrusion, which allows for a sufficient degree of subsequent processing and achieves similar results with less heat treatment than before. can be obtained.
特に熱処理後の冷間加工度による臨界電流密度の向上は
、従来の１段時効では殆んど見込めなかったものが、こ
の発明では従来の多段時効よりも小さな断面減少率で臨
界電流密度が向上するため熱処理時の線径を小さくする
ことができるのである。In particular, improvement in critical current density due to the degree of cold working after heat treatment could hardly be expected with conventional single-stage aging, but with this invention, critical current density is improved with a smaller area reduction rate than with conventional multi-stage aging. Therefore, the wire diameter during heat treatment can be reduced.
〈実施例〉 以下、この発明を実施例により詳細に説明する。<Example> Hereinafter, this invention will be explained in detail with reference to Examples.
下記第１表に示す条件で押出、熱処理した隆−Ｔｉ ４
ｊｔ １Ｂ多芯超電導導体について、その加工度と臨界
電流密度との関係を調べたところ添付図面に示す結果が
得られた。Ryu-Ti 4 extruded and heat treated under the conditions shown in Table 1 below
When the relationship between the processing degree and the critical current density of the jt 1B multicore superconductor was investigated, the results shown in the attached drawings were obtained.
第 １ 表 押出、熱処理条件
この結果から、従来の方法では１段時効では加工により
殆んど臨界電流密度の変化がないが、この発明による１
段時効では小さな断面減少率の加工で、従来の２段時効
におけると同程度の臨界電流密度の上昇が認められた。Table 1 Extrusion and heat treatment conditions From these results, it can be seen that in the conventional method, there is almost no change in the critical current density due to processing in one-stage aging, but in the case of the present invention,
In stage aging, the same degree of increase in critical current density as in conventional two-stage aging was observed when the area reduction rate was small.
〈発明の効果〉
以上説明したように、この発明の方法によれば従来より
少ない熱処理で臨界電流密度の向上が見込めるうえに、
熱処理時の線径を小さくすることができ、取扱いが容易
になるという利点と、それを逆に利用して充分加工度の
とれない寸法の超電導線の製造に効果的であることが認
められた。<Effects of the Invention> As explained above, according to the method of the present invention, an improvement in critical current density can be expected with less heat treatment than before, and
It has been recognized that the wire diameter during heat treatment can be reduced, making it easier to handle, and that it can be used to effectively manufacture superconducting wires with dimensions that cannot be processed sufficiently. .
図面はこの発明の方法と従来方法とで青られた超電４導
体の磁界６テスラにおける臨界電流密度の加工度依存性
を示す図表である。The drawing is a chart showing the working degree dependence of the critical current density in a magnetic field of 6 tesla in a superconducting four-conductor obtained by the method of the present invention and the conventional method.
Claims (3)
中に埋め込んだ複合超電導ビレットを熱間押出加工した
後、断面減少率８０％以上の冷間加工を加え、さらに１
回以上の時効熱処理を施した後、断面減少率３０％以上
の冷間加工を加えることを特徴とするＮｏ−Ｔｉ系極細
多芯超電導導体の製造方法。(1) After hot extruding a composite superconducting billet in which multiple core wires made of No-Ti alloy are embedded in a copper base material, cold working with a reduction in area of 80% or more is performed, and then
A method for manufacturing a No-Ti-based ultrafine multifilamentary superconducting conductor, which comprises performing aging heat treatment at least once and then cold working with a reduction in area of 30% or more.
の温度で０．２〜３０時間加熱した後、熱間押出を行な
うことを特徴とする特許請求の範囲第１項記載のＮｏ−
Ｔｉ系極細多芯超電導導体の製造方法。(2) The composite superconducting billet is heated at a temperature of 600°C or more and 700°C or less for 0.2 to 30 hours, and then hot extruded.
A method for producing a Ti-based ultrafine multicore superconducting conductor.
で行なうことを特徴とする特許請求の範囲第１項または
第２項記載のＮｏ−Ｔｉ系極細多芯超電導導体の製造方
法。(3) The method for producing a No-Ti-based ultrafine multifilamentary superconducting conductor according to claim 1 or 2, characterized in that the hot extrusion process is carried out at a temperature of 540°C or higher and 600°C or lower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29849586A JPS63150814A (en) | 1986-12-15 | 1986-12-15 | Manufacture of nb-ti based fine multi-core superconductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29849586A JPS63150814A (en) | 1986-12-15 | 1986-12-15 | Manufacture of nb-ti based fine multi-core superconductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63150814A true JPS63150814A (en) | 1988-06-23 |
Family
ID=17860449
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29849586A Pending JPS63150814A (en) | 1986-12-15 | 1986-12-15 | Manufacture of nb-ti based fine multi-core superconductor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63150814A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH058701U (en) * | 1991-07-23 | 1993-02-05 | アルプス電気株式会社 | Transformer wiring mechanism for rotating head unit |
| CN111715719A (en) * | 2020-07-01 | 2020-09-29 | 哈尔滨理工大学 | Extrusion forming device and method for heterogeneous light metal splice plate |
-
1986
- 1986-12-15 JP JP29849586A patent/JPS63150814A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH058701U (en) * | 1991-07-23 | 1993-02-05 | アルプス電気株式会社 | Transformer wiring mechanism for rotating head unit |
| CN111715719A (en) * | 2020-07-01 | 2020-09-29 | 哈尔滨理工大学 | Extrusion forming device and method for heterogeneous light metal splice plate |
| CN111715719B (en) * | 2020-07-01 | 2022-02-18 | 哈尔滨理工大学 | Extrusion forming device and method for heterogeneous light metal splice plate |
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