JPS60255904A - Manufacture of shape memory alloy pipe - Google Patents
Manufacture of shape memory alloy pipeInfo
- Publication number
- JPS60255904A JPS60255904A JP11087184A JP11087184A JPS60255904A JP S60255904 A JPS60255904 A JP S60255904A JP 11087184 A JP11087184 A JP 11087184A JP 11087184 A JP11087184 A JP 11087184A JP S60255904 A JPS60255904 A JP S60255904A
- Authority
- JP
- Japan
- Prior art keywords
- powder
- alloy
- shape memory
- memory alloy
- manufacture
- 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
Abstract
Description
【発明の詳細な説明】
本発明は形状記憶合金バイブの製造方法に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a shape memory alloy vibrator.
形状記憶合金はその特異な性質を利用してアクチュエー
タ、バイブ継手をはじめ工業あるいは医療などの広い分
野でその応用開発が進められている。Utilizing its unique properties, shape memory alloys are being developed for use in a wide range of fields, including actuators, vibrator joints, industry, and medicine.
実用的な形状記憶合金としては、例えば特開昭48−1
7416号公報に記載された、Ni50aし%、Ti5
0れ%を中心とする前後数%の範囲の組成からなるT
i −N 1ifS合金、あるいは特開昭58−151
445号公報に記載されたNi50゜3−53.Oat
%、残部TiよりなるT i −N i系合金などの゛
ri−Ni系合金(あるいはこれらの合金に各種添加物
を含有させたTi−Ni系舎4K)およびCu基合金が
広く知られている。As a practical shape memory alloy, for example, JP-A-48-1
Ni50a%, Ti5 described in Japanese Patent No. 7416
T consisting of a composition in the range of several % around 0%
i-N 1ifS alloy or JP-A-58-151
Ni50°3-53. described in Publication No. 445. Oat
%, the balance being Ti, Ti-Ni alloys such as Ti-Ni alloys (or Ti-Ni alloys containing various additives in these alloys) and Cu-based alloys are widely known. There is.
このうちCu基合金は比較的加工が容易なため材料コス
トが安価である反面、材料の強度、繰り返し変形をした
ときの寿命あるいは耐食性などの信頼性に問題があるた
めあまり使用されていない。Among these, Cu-based alloys are relatively easy to process and therefore have low material cost, but are not used much because they have problems with reliability such as material strength, lifespan when repeatedly deformed, and corrosion resistance.
一方Ti−Ni系合金は材料特性が優れているので、前
記産業分野を中心としてその応用開発が特に推進されて
いる。On the other hand, since Ti--Ni alloys have excellent material properties, their application and development are being particularly promoted mainly in the above-mentioned industrial fields.
しかしながら、このTi−Ni系合金は熱伝導率が小さ
いため、外熱式で加熱・冷却を行なう場合、特に冷却時
の応答速度が遅いという問題があり、また塑性加工が容
易でないため、使用形状に加工するのに多(の工程を必
要とし、製造コストが極めて高く、実用材料として問題
を有するものである。However, this Ti-Ni alloy has a low thermal conductivity, so when heating and cooling using an external heating method, there is a problem that the response speed is particularly slow during cooling.Also, plastic working is not easy, so the shape used It requires many steps to process, and the manufacturing cost is extremely high, making it problematic as a practical material.
すなわち、形状記憶合金を用いた装置を駆動する場合は
、外部からの加熱や抵抗加熱により行なわれ、その場合
は比較的速い応答速度が得られる。That is, when driving a device using a shape memory alloy, external heating or resistance heating is used, and in that case, a relatively fast response speed can be obtained.
しかし冷却に際しては自然冷却によるか、せいぜい気流
中で冷却を行なうしかなく、応答速度が遅いため実用上
大きな問題となっている。However, the only way to cool it is by natural cooling or, at best, in an air stream, and the response speed is slow, which poses a big problem in practice.
これを解決する手段としてはいくつかの方法が考えられ
るが、本発明者らが検討した結果、中空線材中に冷媒を
通す手段が有効であることを見出した。Several methods can be considered to solve this problem, but the inventors of the present invention have investigated and found that passing a refrigerant through a hollow wire is effective.
しかしながら、現実問題としてはT i −N i糸形
状記憶は第2図に示されるように債造材ビレットを使用
して製造されているため塑性加工が容易でな(、その中
空線材を作るのは極めて困難である。However, as a practical matter, as shown in Figure 2, Ti-Ni yarn shape memory is manufactured using a bond billet, so plastic working is not easy (and it is difficult to make the hollow wire). is extremely difficult.
特に素管を製造する工程が難しく、深絞りや板を曲げる
方法では、非常に多くの工程を必要とし実用的でない。In particular, the process of manufacturing raw pipes is difficult, and methods such as deep drawing or bending a plate require a large number of steps and are not practical.
本発明はTi−Ni系形状記憶合金のもつ上記欠点を取
り除き、真に実用材料として有効な材料、特にパイプを
容易に製造することができる方法を提供せんとするもの
である。The present invention aims to eliminate the above-mentioned drawbacks of Ti--Ni type shape memory alloys and to provide a method for easily manufacturing materials that are truly effective as practical materials, especially pipes.
本発明は、T i −N i系合金粉末単独、 または
T;粉末およびNi粉末のうちの1種以上とTi−Ni
系合金粉末の混合粉末、またはTi粉末およびNi粉末
の混合粉末を押し固め、熱間にて押出成形することを特
徴とするものである。The present invention provides Ti-Ni alloy powder alone, or Ti-Ni alloy powder with one or more of T; powder and Ni powder.
The method is characterized in that a mixed powder of alloy powder or a mixed powder of Ti powder and Ni powder is compacted and hot extruded.
本発明者らは種々の素管製造方法を検討した結果、後工
程をなるべく容易にするためには、押出しでできる限り
最終製品に近い形状を得ることが最も有効であることに
着目した。The inventors of the present invention have studied various methods for manufacturing raw pipes, and have focused on the fact that in order to make post-processing as easy as possible, it is most effective to obtain a shape as close to the final product as possible by extrusion.
ところがパイプの押出しのように過酷な加工法では、匍
造材をビレットに用いたのでは押出比(ビレットの断面
積と押出材の断面積との比)が十分大きくとれず、押出
材のパイプ形状には限りがある。However, in harsh processing methods such as extrusion of pipes, the extrusion ratio (the ratio of the cross-sectional area of the billet to the cross-sectional area of the extruded material) cannot be made sufficiently large if the billet is made of molten material. There are limits to the shapes.
しかしながら、本発明による、T i −N i系合金
粉末単独、またはTi粉末およびNi粉末のうちの1種
以上とTi−Ni系合金粉末の混合粉末、またはTi粉
末およびNi粉末の混合粉末を出発原料として押出しを
行なえば、欝遺材のビレットを用いた場合に比べて変形
性が良好なためパイプ化が容易である。However, according to the present invention, starting from a Ti-Ni alloy powder alone, a mixed powder of Ti-Ni alloy powder with one or more of Ti powder and Ni powder, or a mixed powder of Ti powder and Ni powder, If extrusion is used as a raw material, the deformability is better than when billets of depleted materials are used, so it is easier to make into pipes.
粉末を押し固めるには通常はプレスを用いて成形する。A press is usually used to compact the powder.
そしてこの成形体の押出しは、これをその*ま押出機に
挿入するか、あるいは焼成し取扱い易くして押出機に挿
入するか、さらにはシー人材に入れたものを挿入するか
して押出す等、種々の方法により押出しを行なうことが
できるのである。The molded body is then extruded by inserting it into the extruder, or by firing it to make it easier to handle and then inserting it into the extruder, or by inserting it into the extruder. Extrusion can be carried out by various methods such as.
以下、本発明を実施例に基づいて説明する。Hereinafter, the present invention will be explained based on examples.
〔実施例1〕
Ti70at%、Ni30at%となるように配合した
合金溶湯を、〃スアトマイズ法により粉末化し、その合
金粉末にNi粉末をバイングーとして加え、平均組成が
Ti50at%、Ni50at%となるようにしたのち
、ボールミルにて均一に混合した。混合粉をプレス成形
し、65φ×(3〜10φ)X100 lのビレットを
得た。[Example 1] A molten alloy containing 70 at% Ti and 30 at% Ni was pulverized by the atomization method, and Ni powder was added as a binder to the alloy powder so that the average composition was 50 at% Ti and 50 at% Ni. After that, the mixture was uniformly mixed using a ball mill. The mixed powder was press-molded to obtain a billet of 65φ×(3 to 10φ)×100 liters.
このビレットを約900℃に加熱し、第1図に示す方法
によりパイプの押出しを行なった。This billet was heated to about 900° C. and extruded into a pipe by the method shown in FIG.
すなわち、グイホルダー6を介してダイス5を装着した
コンテナー2の穴8内のダイス5側に、1000℃で粘
度が100 Po1seの〃フス粉末を潤滑剤として配
すると共に、前記穴8内に中空に成形した粉末ビレット
1を挿入し、ついでダミーブロック3の先端小径部を前
記粉末ビレット1の中央の穴に嵌入させ、大径部を前記
穴8に嵌挿して、ステム4によりダミーブロック3を介
して粉末ビレット1を加圧し、ダミーブロック3の小径
部の外周とダイス5の内周との間がら粉末ビレット1を
押出してパイプを製造した。That is, fuss powder having a viscosity of 100 Po1se at 1000° C. is placed as a lubricant on the side of the die 5 in the hole 8 of the container 2 in which the die 5 is mounted via the Gooey holder 6, and a hollow hole is placed in the hole 8. Insert the powder billet 1 which has been shaped into a shape, then fit the small diameter part of the tip of the dummy block 3 into the hole in the center of the powder billet 1, fit the large diameter part into the hole 8, and insert the dummy block 3 using the stem 4. The powder billet 1 was pressurized through the dummy block 3 and the powder billet 1 was extruded between the outer periphery of the small diameter portion of the dummy block 3 and the inner periphery of the die 5 to manufacture a pipe.
モして押出管径を種々に変えて冑造材ビレットを用いて
パイプを押出した場合と比較した。第1表にその結果を
示す。The diameter of the extruded pipe was varied and compared with the case where pipes were extruded using billet material. Table 1 shows the results.
なお、得られたパイプは1200℃で5時間の拡散焼結
を行ない、さらにドローベンチを用いて最終製品にした
。Note that the obtained pipe was subjected to diffusion sintering at 1200° C. for 5 hours, and then made into a final product using a draw bench.
第1表から、粉末を押し固めた粗末ビレフトを用いた場
合には、舞造材ビレッFを用いた場合よりも、より小径
のパイプを得ることが可能であると共に、工数が短縮し
、歩留りの向上が着しいことがわかる。From Table 1, when using coarse billet made by compacting powder, it is possible to obtain a pipe with a smaller diameter than when using Maizozai billet F, and the number of man-hours is shortened, resulting in a lower yield. It can be seen that there has been a steady improvement in
なお、上記実施例では、合金溶湯をガスアトマイズ法に
よって粉末化したが、粉末化する手段としては水7トマ
イズ法、溶湯急冷法などによってもよい。In the above embodiments, the molten alloy was pulverized by gas atomization, but the molten alloy may be pulverized by a water atomization method, a molten metal quenching method, or the like.
上記実施例においてNi粉末化をバイングーとして加え
たのは、合金粉末の最終組成がTi50at%、Ni5
0at%では成形性が悪いのでこれをよくするためであ
る。In the above example, the Ni powder was added as a binder because the final composition of the alloy powder was Ti50at%, Ni5
This is to improve moldability since moldability is poor at 0 at%.
しかしながら、本発明においてTi−Ni系合金粉末に
は各種の添加物が含まれる場合があるので、この添加物
中の元素にバイングーとしてNi粉末などを添加する必
要は特にない。また合金粉末のM虞によっては、特にバ
イングーを加えなくても押し固めて成形することが可能
な場合もあるので、この場合もバイングーの添加は必要
ではない。However, in the present invention, since the Ti--Ni alloy powder may contain various additives, there is no particular need to add Ni powder or the like as binder to the elements in the additives. Further, depending on the M potential of the alloy powder, it may be possible to compact and mold the alloy powder without particularly adding baingu, so addition of baingu is not necessary in this case as well.
上述のように本発明は、粉末合金を押し固めて成形し、
その成形体を熱間で押出してパイプを成形するので、小
径のパイプまで押出すことが可能であり、また従来に比
してその製造工数は低減し、歩留りは向上する等、工業
上の効果は極めて大である。As mentioned above, the present invention compacts and shapes a powder alloy,
Since the molded body is hot extruded to form a pipe, it is possible to extrude even small diameter pipes, and it also has industrial effects such as reducing the number of manufacturing steps and improving yield compared to conventional methods. is extremely large.
第1図は本発明方法実施の状況の一例を示す要部断面図
、第2図はT i −N i糸形状記憶合金の従来の製
造工程を示す図である。
1:中空ビレット、2:コンテナー、3ニゲミーブロツ
ク、4:ステム、5:ダイス、6:ガラス潤滑剤、7:
グイホルダー、8:コンテナーの穴代理人 弁理士 本
間 崇
′f;1 図
第 2 図FIG. 1 is a sectional view of a main part showing an example of the state of implementation of the method of the present invention, and FIG. 2 is a diagram showing a conventional manufacturing process of a Ti-Ni thread shape memory alloy. 1: Hollow billet, 2: Container, 3 Nigemy block, 4: Stem, 5: Dice, 6: Glass lubricant, 7:
Gui Holder, 8: Container Hole Agent Patent Attorney Takashi Honma'f;1 Figure 2
Claims (1)
粉末のうちの1種以上とTi−Ni系合金粉末の混合粉
末、またはTi粉末およびNi粉末の混合粉末を押し固
め、熱間にて押出成形形することを特徴とするTi−N
i系形状記憶今金パイプの製造方法。Ti-Ni alloy powder alone or Ti powder and Ni
Ti-N, which is characterized by compacting a mixed powder of one or more of the powders and a Ti-Ni alloy powder, or a mixed powder of Ti powder and Ni powder, and hot extrusion molding.
A method for manufacturing an i-based shape memory imakane pipe.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11087184A JPS60255904A (en) | 1984-06-01 | 1984-06-01 | Manufacture of shape memory alloy pipe |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11087184A JPS60255904A (en) | 1984-06-01 | 1984-06-01 | Manufacture of shape memory alloy pipe |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS60255904A true JPS60255904A (en) | 1985-12-17 |
Family
ID=14546811
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11087184A Pending JPS60255904A (en) | 1984-06-01 | 1984-06-01 | Manufacture of shape memory alloy pipe |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS60255904A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102366836A (en) * | 2011-10-25 | 2012-03-07 | 航天材料及工艺研究所 | Production method of high-performance titanium alloy blind pipe |
-
1984
- 1984-06-01 JP JP11087184A patent/JPS60255904A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102366836A (en) * | 2011-10-25 | 2012-03-07 | 航天材料及工艺研究所 | Production method of high-performance titanium alloy blind pipe |
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