JPH101761A - Manufacturing method of nickel titanium alloy material - Google Patents
Manufacturing method of nickel titanium alloy materialInfo
- Publication number
- JPH101761A JPH101761A JP15265496A JP15265496A JPH101761A JP H101761 A JPH101761 A JP H101761A JP 15265496 A JP15265496 A JP 15265496A JP 15265496 A JP15265496 A JP 15265496A JP H101761 A JPH101761 A JP H101761A
- Authority
- JP
- Japan
- Prior art keywords
- nickel
- titanium
- titanium alloy
- alloy material
- laminated composite
- 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
- 229910001000 nickel titanium Inorganic materials 0.000 title claims abstract description 32
- 239000000956 alloy Substances 0.000 title claims abstract description 29
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000010949 copper Substances 0.000 claims abstract description 29
- 238000010438 heat treatment Methods 0.000 claims abstract description 27
- 229910052802 copper Inorganic materials 0.000 claims abstract description 23
- 239000010936 titanium Substances 0.000 claims abstract description 22
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 21
- 238000009792 diffusion process Methods 0.000 claims abstract description 21
- 239000002131 composite material Substances 0.000 claims abstract description 20
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 19
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 13
- 238000005482 strain hardening Methods 0.000 claims abstract description 10
- 230000032683 aging Effects 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims description 35
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 239000007769 metal material Substances 0.000 claims description 5
- 229910052804 chromium Inorganic materials 0.000 claims description 3
- 229910052737 gold Inorganic materials 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 229910052748 manganese Inorganic materials 0.000 claims description 3
- 229910052758 niobium Inorganic materials 0.000 claims description 3
- 229910052720 vanadium Inorganic materials 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- 239000011162 core material Substances 0.000 claims 1
- 239000004065 semiconductor Substances 0.000 claims 1
- 238000012545 processing Methods 0.000 abstract description 24
- 239000000203 mixture Substances 0.000 abstract description 16
- 230000009466 transformation Effects 0.000 abstract description 13
- 229910052782 aluminium Inorganic materials 0.000 abstract description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 6
- 238000002844 melting Methods 0.000 abstract description 4
- 230000008018 melting Effects 0.000 abstract description 4
- 230000000087 stabilizing effect Effects 0.000 abstract 1
- HZEWFHLRYVTOIW-UHFFFAOYSA-N [Ti].[Ni] Chemical compound [Ti].[Ni] HZEWFHLRYVTOIW-UHFFFAOYSA-N 0.000 description 8
- 238000005452 bending Methods 0.000 description 6
- 150000001875 compounds Chemical class 0.000 description 5
- 229910045601 alloy Inorganic materials 0.000 description 4
- 238000000137 annealing Methods 0.000 description 4
- 230000003446 memory effect Effects 0.000 description 4
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 3
- 239000011651 chromium Substances 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000010931 gold Substances 0.000 description 3
- 239000011572 manganese Substances 0.000 description 3
- 239000010955 niobium Substances 0.000 description 3
- 229910017604 nitric acid Inorganic materials 0.000 description 3
- 238000005275 alloying Methods 0.000 description 2
- 229910001566 austenite Inorganic materials 0.000 description 2
- 229910000765 intermetallic Inorganic materials 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 241000282342 Martes americana Species 0.000 description 1
- 229910003310 Ni-Al Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 238000011978 dissolution method Methods 0.000 description 1
- 229910001325 element alloy Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000002648 laminated material Substances 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910001285 shape-memory alloy Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- GPPXJZIENCGNKB-UHFFFAOYSA-N vanadium Chemical compound [V]#[V] GPPXJZIENCGNKB-UHFFFAOYSA-N 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Landscapes
- Laminated Bodies (AREA)
Abstract
(57)【要約】
【課題】 ニッケルチタン合金材にあって、その変態点
の安定化が図れ、加工効率の向上及びローコスト化が図
れるようにする。
【解決手段】 ニッケル、チタン及びアルミニウムの３
枚のシート材を積層状態に密巻きして積層複合体を形成
し（処理１０１）、前記積層複合体の表面に銅層を設け
（処理１０２）、前記積層複合体の厚みが所定値になる
まで減面加工し（処理１０３）、前記銅層を除去し（処
理１０４）、所定の温度で拡散加熱し（処理１０５）、
冷間加工を施し（処理１０６）、所定の温度で時効熱処
理を行う（処理１０７）ことにより、従来の溶解方法に
比べてＮｉ及びＴｉの損失がなくなり、製品状態の組成
は当初に予定した組成からずれることがない。
(57) [Problem] To provide a nickel-titanium alloy material capable of stabilizing its transformation point, improving processing efficiency and reducing cost. SOLUTION: Nickel, titanium and aluminum 3
A sheet composite is tightly wound in a laminated state to form a laminated composite (processing 101), a copper layer is provided on the surface of the laminated composite (processing 102), and the thickness of the laminated composite becomes a predetermined value. (Step 103), the copper layer is removed (Step 104), and diffusion heating is performed at a predetermined temperature (Step 105).
By performing cold working (processing 106) and performing aging heat treatment at a predetermined temperature (processing 107), the loss of Ni and Ti is reduced as compared with the conventional melting method, and the composition in the product state is the composition originally planned. There is no deviation.
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、超弾性効果を含む
形状記憶効果を有するニッケルチタン合金材に関するも
のである。The present invention relates to a nickel titanium alloy material having a shape memory effect including a superelastic effect.
【０００２】[0002]
【従来の技術】ニッケルチタン（Ｎｉ−Ｔｉ）合金材は
形状記憶合金の１つであり、耐食性、耐使用回数、耐久
性等に優れた合金材として知られている。ニッケルチタ
ン合金材は、従来より、パイプ継手、超弾性効果を利用
した携帯電話のアンテナ材などに使用されている。ニッ
ケルチタン合金材の従来の製造方法は、スポンジチタン
とニッケルとを真空中でアーク溶解し、得られた鋳塊を
熱間加工した後、焼鈍と冷間加工を繰り返し、所望のサ
イズに加工するものであり、例えば、特願昭５７−４３
３６５号、「塑性と加工」（日本塑性加工学会誌、第２
９巻、第３２６号（１９８８年））に具体的な開示がな
されている。例えば、特願昭５７−４３３６５号に示さ
れる超弾性材では、熱間加工した後の材料を冷間加工率
２０％以上で加工し、２５０℃以上の温度で再結晶させ
ずに加熱することにより製造している。2. Description of the Related Art Nickel-titanium (Ni-Ti) alloy is one of the shape memory alloys, and is known as an alloy excellent in corrosion resistance, number of times of use, durability and the like. Nickel-titanium alloy materials have conventionally been used for pipe joints, antenna materials for mobile phones utilizing the superelastic effect, and the like. The conventional manufacturing method of nickel-titanium alloy material is to arc-melt sponge titanium and nickel in a vacuum, hot-work the obtained ingot, repeat annealing and cold-working, and work to a desired size. For example, Japanese Patent Application No. 57-43
No. 365, "Plasticity and Processing" (Journal of the Japan Society for Technology of Plasticity, No. 2
9, No. 326 (1988)). For example, in the case of a superelastic material disclosed in Japanese Patent Application No. 57-43365, a material after hot working is processed at a cold working rate of 20% or more and heated at a temperature of 250 ° C. or more without recrystallization. It is manufactured by.
【０００３】ニッケルチタン合金材は、高温の状態では
母相のオーステナイト相（Ａ相）であるが、冷却すると
或る温度で相変態し、マルテンサイト相（Ｍ相）にな
る。Ｍ相の状態で外力を受けると、見かけ上変形する
が、その後加熱して再びＡ相に逆変態する温度まで上昇
させると、それまで変形していた材料は元の形状に戻っ
てしまう。これが形状記憶効果である。Ａ相から冷却し
たときにＭ相に変態する温度がマルテン変態点（Ｍ点）
とよばれ、逆に、Ｍ相からＡ相に逆変態する温度がオー
ステナイト変態点（Ａ点）と呼ばれる。ニッケルチタン
合金材のＭ点は、合金組成に大きく依存することが知ら
れているので、鋳造工程では溶解作業中にサンプル抽出
して分析し、変態温度補正用の合金元素を添加すること
が行われている。また、冷間加工では急激な加工硬化を
示すため、目的サイズによっては焼鈍を多く行わなけれ
ばならない。[0003] Nickel-titanium alloy material is a parent austenite phase (A phase) at a high temperature, but when cooled, undergoes a phase transformation at a certain temperature to become a martensite phase (M phase). When an external force is applied in the state of the M phase, the material deforms apparently. However, when the material is heated and then heated again to a temperature at which the material transforms back to the A phase, the material that has been deformed returns to its original shape. This is the shape memory effect. The temperature at which it transforms to the M phase when cooled from the A phase is the Marten transformation point (M point)
On the contrary, the temperature at which the M phase is reversely transformed to the A phase is called an austenite transformation point (point A). It is known that the M point of nickel-titanium alloy material greatly depends on the alloy composition. In the casting process, it is necessary to extract and analyze a sample during the melting operation and add an alloying element for correcting the transformation temperature. Have been done. Further, since cold work shows rapid work hardening, annealing must be performed frequently depending on the target size.
【０００４】[0004]
【発明が解決しようとする課題】しかし、従来のニッケ
ルチタン合金材の製造方法によると、ニッケルチタン材
は超弾性効果を示し、冷間加工では非常に強いスプリン
グバックを示すうえ、難加工材であるため、冷間加工に
おける焼鈍間加工度も１０％程度しかとれず、銅材など
に比べると加工効率は非常に低く、所望サイズの小さい
製品では総加工度が大きくなる。このため、焼鈍回数が
増し、結果的に加工費用が増大する。However, according to the conventional method for producing a nickel-titanium alloy material, the nickel-titanium material has a superelastic effect, exhibits a very strong springback in cold working, and is difficult to work with. For this reason, the degree of work during annealing in cold working can be as low as only about 10%, the working efficiency is extremely low as compared with copper or the like, and the total work degree is large in products having a small desired size. For this reason, the number of times of annealing increases, and as a result, the processing cost increases.
【０００５】また、ニッケルチタン合金の鋳塊を得るに
は、溶解作業において酸化等による消耗で所定の組成か
らずれる恐れがある。このため、溶解中に溶湯をサンプ
リングし、変態点を測定した後、当初予定していた変態
点に補正するために合金元素の添加等を行う必要があ
る。このように、変態点の組成依存性が強いこと、及び
急激な加工硬度を示すことから、ニッケルチタン合金材
は非常に高価な合金材になっており、実用性が阻まれて
いる。Further, in order to obtain an ingot of a nickel-titanium alloy, there is a possibility that the composition may deviate from a predetermined composition due to consumption due to oxidation or the like in a melting operation. For this reason, it is necessary to sample the molten metal during melting, measure the transformation point, and then add an alloy element or the like to correct the transformation point as originally planned. As described above, since the transformation point is highly dependent on the composition and exhibits a sharp working hardness, the nickel-titanium alloy material is an extremely expensive alloy material, which hinders practicality.
【０００６】そこで本発明は、ニッケルチタン合金材の
変態点の安定化が図れ、加工効率の向上及びローコスト
化が可能なニッケルチタン合金材の製造方法を提供する
ことを目的としている。Accordingly, an object of the present invention is to provide a method for producing a nickel-titanium alloy material in which the transformation point of the nickel-titanium alloy material can be stabilized, the processing efficiency can be improved, and the cost can be reduced.
【０００７】[0007]
【課題を解決するための手段】上記の目的を達成するた
めに、本発明は、ニッケルシート材、チタンシート材、
及び第３の元素によるシート材を積層状態に密巻きして
積層複合体を形成し、必要に応じて前記積層複合体の表
面に銅層を設け、前記積層複合体の厚みが所定値になる
まで減面加工し、前記銅層が設けられた時には該銅層を
除去し、所定の温度で拡散加熱し、冷間加工を施し、所
定の温度で時効熱処理を行う方法にしている。To achieve the above object, the present invention provides a nickel sheet material, a titanium sheet material,
And a sheet material of the third element is closely wound in a laminated state to form a laminated composite, and a copper layer is provided on the surface of the laminated composite as necessary, and the thickness of the laminated composite becomes a predetermined value. In this method, when the copper layer is provided, the copper layer is removed, diffusion heating is performed at a predetermined temperature, cold working is performed, and aging heat treatment is performed at a predetermined temperature.
【０００８】この方法によれば、第３の元素によるシー
ト材によりＮｉ−Ｔｉ合金材の変態温度の調整が行え、
減面加工及び冷間加工によりボイドの発生が防止され
（これにより曲げ耐久性が向上する）、続く拡散加熱に
よってＮｉ及びＴｉの損失がなくなる。この結果、当初
に予定した組成から製品状態の組成にずれが生じないよ
うにすることができる。According to this method, the transformation temperature of the Ni—Ti alloy material can be adjusted by the sheet material of the third element,
Void formation is prevented by the surface reduction processing and the cold processing (the bending durability is improved), and the loss of Ni and Ti is eliminated by the subsequent diffusion heating. As a result, it is possible to prevent the composition in the product state from deviating from the composition originally planned.
【０００９】前記第３の元素によるシート材は、Ａｌ、
Ｖ、Ｃｒ、Ｍｎ、Ｆｅ、Ｃｏ、Ｃｕ、Ｎｂ、Ａｕのいず
れかの元素で構成されたものを用いることができる。こ
れによれば、用途、目的等に応じて最適な素材を選択す
ることができる。前記銅層は、１０ｋｇｆ／ｍｍ2 以上
の引張強度を持つ銅以外の金属材を用いることができ
る。The sheet material made of the third element is Al,
V, Cr, Mn, Fe, Co, Cu, Nb or Au can be used. According to this, it is possible to select an optimum material according to the use, purpose, and the like. As the copper layer, a metal material other than copper having a tensile strength of 10 kgf / mm 2 or more can be used.
【００１０】この金属材によれば、焼鈍状態で１０ｋｇ
ｆ／ｍｍ2 以上の引張強度を有していれば、銅でなくと
も減面加工時の焼き付きを防止することができる。前記
ニッケルチタン合金材は、原子％でＮｉが４２．０〜５
１．５％、前記第３の元素が８％以下、残部がＴｉによ
る組成にすることができる。この組成によれば、第３の
元素によってＮｉ−Ｔｉ合金材の変態温度調整が行え、
所望の組成を得ることができるので、パイプ継手、携帯
電話のアンテナ材等に適した耐食性、耐使用回数、耐久
性等を得ることができる。According to this metal material, 10 kg in an annealed state
If it has a tensile strength of not less than f / mm 2, it is possible to prevent seizure at the time of surface reduction processing even if it is not made of copper. The nickel-titanium alloy material contains 42.0-5 atomic percent Ni.
The composition can be 1.5%, the third element is 8% or less, and the balance is Ti. According to this composition, the transformation temperature of the Ni—Ti alloy material can be adjusted by the third element,
Since a desired composition can be obtained, corrosion resistance, number of times of use, durability and the like suitable for pipe joints, antenna materials of mobile phones, and the like can be obtained.
【００１１】[0011]
【発明の実施の形態】図１は本発明によるニッケルチタ
ン合金材の製造方法を示すフローチャートであり、図２
は本発明方法により製造されるニッケルチタン合金線の
途中工程における断面図である。まず、ニッケルシー
ト、チタンシート及びアルミニウム（Ａｌ）シートの３
枚を重ね巻きして積層複合体１が作られる（処理１０
１）。積層複合体１は、予め製造目標組成（パイプ継
手、携帯電話のアンテナ材等に適した耐食性、耐使用回
数、耐久性等が得られる組成、具体的には、原子％でＮ
ｉが４２．０〜５１．５％、前記第３の元素が８％以
下、残部がＴｉ）に見合うシート板厚の材料を用い。ま
た、積層回数は製品（パイプ継手、携帯電話のアンテナ
材等）の太さ（径）に見合ったものにする。FIG. 1 is a flow chart showing a method for producing a nickel titanium alloy material according to the present invention.
FIG. 3 is a cross-sectional view of a nickel titanium alloy wire manufactured by the method of the present invention in an intermediate step. First, nickel sheet, titanium sheet and aluminum (Al) sheet 3
The laminated composite 1 is made by stacking and winding the sheets.
1). The laminated composite 1 has a target composition (a composition capable of obtaining corrosion resistance, a number of times of use, durability, etc., suitable for pipe joints, antenna materials of mobile phones, etc., specifically N atomic%).
i is 42.0 to 51.5%, the third element is 8% or less, and the balance is Ti). Also, the number of laminations should be appropriate for the thickness (diameter) of the product (pipe joint, antenna material of mobile phone, etc.).
【００１２】なお、アルミニウムを第３添加元素として
添加する理由は、Ｎｉ−Ｔｉ２元素系合金の変態温度調
整を行うためである。なお、アルミニウムに代えて、例
えば、Ｖ（バナジウム）、Ｃｒ（クロム）、Ｍｎ（マン
ガン）、Ｆｅ（鉄）、Ｃｏ（コバルト）、Ｃｕ（銅）、
Ｎｂ（ニオブ）、Ａｕ（金）の内の１つを用いることが
できる。[0012] The reason why aluminum is added as the third additive element is to adjust the transformation temperature of the Ni-Ti two-element alloy. In place of aluminum, for example, V (vanadium), Cr (chromium), Mn (manganese), Fe (iron), Co (cobalt), Cu (copper),
One of Nb (niobium) and Au (gold) can be used.
【００１３】積層複合体１を母材として、この積層複合
体１の表面にＣｕ層２が設けられる（処理１０２）。Ｃ
ｕ層２は、積層複合体１を減面加工する際、工具との焼
き付きを防止し、加工を容易にするために設けられる。
更に、引き抜き等により減面加工（例えば、ニッケル又
はチタンのいずれかの膜厚が０．００５ｍｍ以下になる
まで）が施される（処理１０３）。この減面加工の後、
Ｃｕ層２が除去され（処理１０４）、ついで、拡散加熱
処理（例えば、６００〜１１００℃）が施される（処理
１０５）。この段階でＴｉ−Ｎｉ−Ａｌ合金材が得られ
る。Using the laminated composite 1 as a base material, a Cu layer 2 is provided on the surface of the laminated composite 1 (Step 102). C
The u layer 2 is provided in order to prevent seizure with a tool and to facilitate processing when reducing the area of the laminated composite 1.
Further, surface reduction processing (for example, until the thickness of either nickel or titanium becomes 0.005 mm or less) is performed by drawing or the like (processing 103). After this surface reduction,
The Cu layer 2 is removed (process 104), and then a diffusion heating process (for example, at 600 to 1100 ° C.) is performed (process 105). At this stage, a Ti-Ni-Al alloy material is obtained.
【００１４】更に、拡散加熱処理時に発生したボイドを
消失させるために、例えば減面率５％以上の冷間加工を
施し（処理１０６）た後、例えば２００〜６００℃の温
度範囲による時効熱処理が施される（処理１０７）。以
上により、超弾性を含む形状記憶効果を持つニッケルチ
タン合金線材を得ることができる。ここで、減面加工を
行う理由について説明する。拡散加熱後の状態では、材
料の拡散のために多数のボイド（カーケンダルボイド）
が発生する。このボイドは製品状態でのニッケルチタン
材において材料内部の欠陥になるため、曲げを繰り返し
受けるような用途では耐久性を著しく低下させる。そこ
で、ボイドを消滅させるために減面加工及び時効熱処理
を行っている。このボイドの消滅により、製品状態での
曲げの繰り返し特性等の耐久性が向上する。Further, in order to eliminate voids generated during the diffusion heat treatment, for example, after performing cold working with a surface reduction rate of 5% or more (processing 106), aging heat treatment at a temperature range of 200 to 600 ° C. is performed. (Step 107). As described above, a nickel-titanium alloy wire having a shape memory effect including superelasticity can be obtained. Here, the reason for performing the surface reduction processing will be described. After diffusion heating, many voids (Kirkendal voids) due to material diffusion
Occurs. These voids become defects inside the nickel-titanium material in the product state, so that the durability is significantly reduced in applications where bending is repeatedly applied. Therefore, surface reduction processing and aging heat treatment are performed to eliminate voids. By the disappearance of the voids, the durability such as the repetitive bending characteristics in the product state is improved.
【００１５】ニッケルシート及びチタンシートを単に積
層した状態で加熱してもニッケルチタン合金材を生成す
ることは可能であるが、積層材全量を均一な合金材にす
ることは困難である。その理由は、個体拡散による合金
化であるため、積層したシートの板厚方向に拡散が進行
し、板厚方向での濃度の不均一が生じないようにしなけ
ればならないからである。ニッケルチタン系で生成され
る可能性のある金属間化合物は、目的とする化合物も含
めて３種類有り、目的の化合物以外は脆い性質があり、
塑性加工できないことが知られている。Although it is possible to produce a nickel-titanium alloy material simply by heating a nickel sheet and a titanium sheet in a laminated state, it is difficult to make the entire laminated material a uniform alloy material. The reason for this is that since alloying is performed by solid diffusion, diffusion must proceed so that the diffusion of the laminated sheets proceeds in the thickness direction of the stacked sheets and the concentration in the thickness direction does not become uneven. There are three types of intermetallic compounds that can be generated in the nickel-titanium system, including the target compound, and the other compounds are brittle except for the target compound.
It is known that plastic working cannot be performed.
【００１６】したがって、減面加工をしないために、拡
散加熱処理の過程でシートの板厚方向に濃度の不均一が
生じれば、化合物以外の化合物を生成してしまい、結果
的に製造した線材が形状記憶効果を発揮することはおろ
か、曲げに対して非常に弱く、使用に耐えられない恐れ
がある。また、拡散段階では、ニッケルに比べてチタン
の拡散速度が早く、チタン材の存在していた部分に拡散
によってボイドが発生する。このボイドは拡散加熱処理
後に線材を減面加工することにより大部分は消失する
が、線材の曲げ繰り返し特性はボイドのない線材に比べ
て低い特性になる。しかし、減面加工を施すことによ
り、拡散加熱処理における拡散時間を短くすることがで
き、また、濃度の不均一をなくすことにより目的とする
金属間化合物のみを生成することができる。更に、拡散
前のシート間距離を短くできることにより、拡散後に発
生するボイドの大きさが微小化され、結果として拡散後
の減面加工後においてもボイドの痕跡を残さずに済み、
線材の曲げ繰り返し特性にも悪影響を及ぼさないという
相乗効果を得ることができる。Therefore, if the density is not uniform in the thickness direction of the sheet in the process of the diffusion heat treatment in order to prevent the surface reduction, a compound other than the compound is generated, and as a result, the manufactured wire rod Not only exerts a shape memory effect, but is extremely weak against bending, and may not be usable. In the diffusion stage, the diffusion speed of titanium is higher than that of nickel, and voids are generated by diffusion in the portion where the titanium material was present. Most of the voids are eliminated by reducing the surface of the wire after the diffusion heat treatment, but the bending repetition characteristics of the wire are lower than those of the wire without voids. However, by performing the surface reduction processing, the diffusion time in the diffusion heat treatment can be shortened, and only the target intermetallic compound can be generated by eliminating the non-uniform concentration. Furthermore, by being able to shorten the distance between sheets before diffusion, the size of voids generated after diffusion is miniaturized, and as a result, no trace of voids is left even after surface reduction processing after diffusion,
A synergistic effect that does not adversely affect the bending repetition characteristics of the wire can be obtained.
【００１７】以上のように、本発明によれば、従来の溶
解法では得られなかった製品状態での組成の安定性が得
られるため、変態温度の安定をもたらし、当初予定した
組成から製品状態の組成のずれを無くすことができる。
これにより、加工効率の向上及びローコスト化が可能な
ニッケルチタン合金材を得ることができる。As described above, according to the present invention, the stability of the composition in the product state, which cannot be obtained by the conventional dissolution method, is obtained. Can be eliminated.
This makes it possible to obtain a nickel titanium alloy material capable of improving processing efficiency and reducing costs.
【００１８】[0018]
【実施例】次に、本発明の実施例について説明する。 （実施例１）板厚０．１ｍｍの工業用純ニッケルシー
ト、板厚０．１５４ｍｍの工業用純チタンシート、及び
板厚０．００３ｍｍの工業用純アルミニウムシートを重
ね巻きして積層複合体１を形成した。これを工業用純銅
管に組み入れしたものを減面加工し、チタンシート間距
離が０．００５ｍｍになるようにした後、硝酸で銅管部
を除去した。その後、９００℃×１時間の加熱を行っ
た。この加熱により発生したボイドを消失させるため、
１５％の減面加工を行い４００℃×１時間の時効加熱を
行った。得られた線材のＡS 点を測定したところ、５．
１℃であった。Next, an embodiment of the present invention will be described. Example 1 An industrial pure nickel sheet having a thickness of 0.1 mm, an industrial pure titanium sheet having a thickness of 0.154 mm, and an industrial pure aluminum sheet having a thickness of 0.003 mm were stacked and wound to form a laminated composite 1. Was formed. This was assembled into an industrial pure copper tube and subjected to surface reduction processing so that the distance between titanium sheets became 0.005 mm, and then the copper tube portion was removed with nitric acid. Thereafter, heating was performed at 900 ° C. × 1 hour. In order to eliminate voids generated by this heating,
A 15% area reduction process was performed, and aging heating at 400 ° C. × 1 hour was performed. The A S point of the obtained wires were measured, 5.
1 ° C.
【００１９】（実施例２）板厚０．０９８ｍｍの工業用
純ニッケルシート、板厚０．１６ｍｍの工業用純チタン
シート、及び板厚０．００２ｍｍの工業用純Ｆｅシート
を重ね巻きして積層複合体１を形成した。これを工業用
純銅管に組み入れしたものを減面加工し、チタンシート
間距離が０．００５ｍｍになるようにした後、硝酸で銅
管部を除去した。その後、９００℃×１時間の加熱を行
った。この加熱により発生したボイドを消失させるた
め、１５％の減面加工を行い４００℃×１時間の時効加
熱を行った。そして、得られた線材についてＡS 点を測
定したところ、１６．０℃であった。Example 2 An industrial pure nickel sheet having a thickness of 0.098 mm, an industrial pure titanium sheet having a thickness of 0.16 mm, and an industrial pure Fe sheet having a thickness of 0.002 mm are wrapped and laminated. Complex 1 was formed. This was assembled into an industrial pure copper tube and subjected to surface reduction processing so that the distance between titanium sheets became 0.005 mm, and then the copper tube portion was removed with nitric acid. Thereafter, heating was performed at 900 ° C. × 1 hour. In order to eliminate voids generated by this heating, 15% area reduction processing was performed, and aging heating at 400 ° C. × 1 hour was performed. Then, by measurement of A S point of the obtained wires it was 16.0 ° C..
【００２０】（実施例３）芯棒１に線径４ｍｍのチタン
棒を用い、板厚０．１ｍｍの工業用純ニッケルシートと
板厚０．１５９ｍｍの工業用純チタンシート、及び板厚
０．００６ｍｍの工業用純アルミニウムシートを重ね巻
きして積層複合体１を形成した。これを工業用純銅管に
組み入れしたものを減面加工し、チタンシート間距離が
０．００５ｍｍになるようにした後、硝酸で銅管部を除
去した。その後、９００℃×１時間の加熱を行った。こ
の加熱により発生したボイドを消失させるため、１５％
の減面加工を行い４００℃×１時間の時効加熱を行っ
た。得られた線材ついてＡS 点を測定したところ、７
７．７℃であった。(Example 3) A titanium rod having a wire diameter of 4 mm was used as the core rod 1. An industrial pure nickel sheet having a thickness of 0.1 mm and an industrial pure titanium sheet having a thickness of 0.159 mm were prepared. A 006 mm industrial pure aluminum sheet was overlapped and wound to form a laminated composite 1. This was assembled into an industrial pure copper tube and subjected to surface reduction processing so that the distance between titanium sheets became 0.005 mm, and then the copper tube portion was removed with nitric acid. Thereafter, heating was performed at 900 ° C. × 1 hour. To eliminate voids generated by this heating, 15%
And subjected to aging heating at 400 ° C. × 1 hour. When the AS point of the obtained wire was measured, it was 7
7.7 ° C.
【００２１】なお、工程途中での減面加工を伸線して線
材を得るものとしたが、圧延にすれば、線材ではなく、
板材を製造することができる。また、Ｃｕ層２に代えて
他の金属材料を用いることもできる。この場合、焼鈍状
態で１０ｋｇｆ／ｍｍ2 以上の引っ張り強度を有する金
属材料であればよい。或いは、Ｃｕ層２を用いないこと
もできる。例えば、潤滑剤等のように焼き付きを防止で
きるものを用いればよい。Although wire reduction is performed in the course of the surface reduction in the course of the process, a wire is obtained.
Plate material can be manufactured. Further, another metal material can be used instead of the Cu layer 2. In this case, any metal material having a tensile strength of 10 kgf / mm 2 or more in the annealed state may be used. Alternatively, the Cu layer 2 may not be used. For example, a material that can prevent seizure, such as a lubricant, may be used.
【００２２】[0022]
【発明の効果】以上説明した通り、本発明は、ニッケル
シート材、チタンシート材及び第３の元素によるシート
材の３枚シート材を積層状態に密巻きにして形成して積
層複合体を形成し、その厚みが所定値になるまで減面加
工し、所定の温度で拡散加熱し、冷間加工を施し、所定
の温度で時効熱処理を行う過程を含む製造方法にしたの
で、従来の溶解方法に比べてＮｉ及びＴｉの損失がな
く、当初に予定した組成から製品状態の組成がずれない
ようにすることができ、変態温度の安定化、工程の合理
化による低コスト化が可能になる。As described above, according to the present invention, a three-sheet material including a nickel sheet material, a titanium sheet material and a sheet material made of the third element is closely wound in a laminated state to form a laminated composite. Then, the manufacturing method includes the steps of reducing the surface area until the thickness reaches a predetermined value, diffusing and heating at a predetermined temperature, performing cold working, and performing aging heat treatment at a predetermined temperature. In comparison with the above, there is no loss of Ni and Ti, and the composition in the product state can be prevented from deviating from the initially planned composition, so that the transformation temperature can be stabilized and the cost can be reduced by streamlining the process.
【図１】本発明におけるニッケルチタン合金材の製造方
法を示すフローチャートである。FIG. 1 is a flowchart showing a method for producing a nickel titanium alloy material according to the present invention.
【図２】本発明方法により製造されるニッケルチタン合
金線の途中工程における断面図である。FIG. 2 is a cross-sectional view of a nickel-titanium alloy wire manufactured by the method of the present invention in an intermediate step.
１ 積層複合体 ２ Ｃｕ層 1 laminated composite 2 Cu layer
フロントページの続き (72)発明者 酒井 修二 茨城県土浦市木田余町3550番地 日立電線 株式会社システムマテリアル研究所内 (72)発明者 木村 守男 茨城県土浦市木田余町3550番地 日立電線 株式会社システムマテリアル研究所内Continued on the front page (72) Inventor Shuji Sakai 3550 Kida Yomachi, Tsuchiura City, Ibaraki Prefecture Inside Hitachi Cable, Ltd.System Materials Research Laboratories (72) Inventor Morio Kimura 3550 Kida Yomachi, Tsuchiura City, Ibaraki Prefecture Hitachi Cable System Materials, Ltd. In the laboratory
Claims (5)
第３の元素によるシート材を積層状態に密巻きして積層
複合体を形成し、 必要に応じて前記積層複合体の表面に銅層を設け、 前記積層複合体の厚みが所定値になるまで減面加工し、 前記銅層が設けられた時には該銅層を除去し、 所定の温度で拡散加熱し、 冷間加工を施し、 所定の温度で時効熱処理を行うことを特徴とするニッケ
ルチタン合金材の製造方法。1. A laminated composite is formed by tightly winding a nickel sheet material, a titanium sheet material, and a sheet material made of a third element in a laminated state, and a copper layer is formed on the surface of the laminated composite as necessary. Providing, reducing the surface area until the thickness of the laminated composite becomes a predetermined value, removing the copper layer when the copper layer is provided, performing diffusion heating at a predetermined temperature, performing cold working, A method for producing a nickel-titanium alloy material, comprising performing aging heat treatment at a temperature.
Ｖ、Ｃｒ、Ｍｎ、Ｆｅ、Ｃｏ、Ｃｕ、Ｎｂ、Ａｕのいず
れかの元素で構成されていることを特徴とする請求項１
記載のニッケルチタン合金材の製造方法。2. The sheet material made of the third element includes Al,
2. The semiconductor device according to claim 1, wherein the material is made of any one of V, Cr, Mn, Fe, Co, Cu, Nb, and Au.
A method for producing a nickel-titanium alloy material as described above.
張強度を持つ銅以外の金属材を用いることを特徴とする
請求項１記載のニッケルチタン合金材の製造方法。3. The method according to claim 1, wherein said copper layer is made of a metal material other than copper having a tensile strength of 10 kgf / mm 2 or more.
ｉが４２．０〜５１．５％、前記第３の元素が８％以
下、残部がＴｉによる組成であることを特徴とする請求
項１記載のニッケルチタン合金材の製造方法。4. The method according to claim 1, wherein the nickel titanium alloy material is N
2. The method according to claim 1, wherein i is 42.0 to 51.5%, the third element is 8% or less, and the balance is Ti.
はチタンの芯材の上に積層状に密巻して形成されること
を特徴とする請求項１記載のニッケルチタン合金材の製
造方法。5. The method for producing a nickel-titanium alloy material according to claim 1, wherein said laminated composite is formed by tightly winding a sheet material on a nickel or titanium core material in a laminated manner. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15265496A JPH101761A (en) | 1996-06-13 | 1996-06-13 | Manufacturing method of nickel titanium alloy material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15265496A JPH101761A (en) | 1996-06-13 | 1996-06-13 | Manufacturing method of nickel titanium alloy material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH101761A true JPH101761A (en) | 1998-01-06 |
Family
ID=15545164
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15265496A Pending JPH101761A (en) | 1996-06-13 | 1996-06-13 | Manufacturing method of nickel titanium alloy material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH101761A (en) |
-
1996
- 1996-06-13 JP JP15265496A patent/JPH101761A/en active Pending
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