JPS62267434A - Manufacture of ni-ti shape memory alloy sintered compact - Google Patents
Manufacture of ni-ti shape memory alloy sintered compactInfo
- Publication number
- JPS62267434A JPS62267434A JP10929186A JP10929186A JPS62267434A JP S62267434 A JPS62267434 A JP S62267434A JP 10929186 A JP10929186 A JP 10929186A JP 10929186 A JP10929186 A JP 10929186A JP S62267434 A JPS62267434 A JP S62267434A
- Authority
- JP
- Japan
- Prior art keywords
- green compact
- sintering
- sintered
- powder
- compact
- 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.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 11
- 229910001285 shape-memory alloy Inorganic materials 0.000 title claims description 7
- 239000000843 powder Substances 0.000 claims abstract description 21
- 238000005245 sintering Methods 0.000 claims abstract description 16
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 12
- 239000000956 alloy Substances 0.000 claims abstract description 12
- KHYBPSFKEHXSLX-UHFFFAOYSA-N iminotitanium Chemical compound [Ti]=N KHYBPSFKEHXSLX-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910001000 nickel titanium Inorganic materials 0.000 claims abstract description 9
- 239000011148 porous material Substances 0.000 claims abstract description 8
- 229910052796 boron Inorganic materials 0.000 claims abstract description 6
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 6
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 4
- 229910052742 iron Inorganic materials 0.000 claims abstract description 4
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 4
- 229910052726 zirconium Inorganic materials 0.000 claims abstract description 4
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 3
- 229910052802 copper Inorganic materials 0.000 claims abstract 6
- 229910052782 aluminium Inorganic materials 0.000 claims abstract 3
- 229910052719 titanium Inorganic materials 0.000 claims abstract 2
- 239000002184 metal Substances 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002994 raw material Substances 0.000 claims description 4
- 239000012535 impurity Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 9
- 238000005470 impregnation Methods 0.000 abstract description 6
- 238000010438 heat treatment Methods 0.000 abstract description 4
- 238000007731 hot pressing Methods 0.000 abstract description 3
- 239000010949 copper Substances 0.000 abstract 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract 5
- 238000007598 dipping method Methods 0.000 abstract 1
- 239000011261 inert gas Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 14
- 230000009466 transformation Effects 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 238000003754 machining Methods 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 229910000733 Li alloy Inorganic materials 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001513 hot isostatic pressing Methods 0.000 description 2
- 238000004663 powder metallurgy Methods 0.000 description 2
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000001989 lithium alloy Substances 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000009703 powder rolling Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Landscapes
- Powder Metallurgy (AREA)
Abstract
Description
【発明の詳細な説明】
発明の目的
（産業上の利用分野］
本発明は、Ｎｉ−Ｔｉ系形状記憶合金からなる焼結体の
′！Ａ造方法の改良に関する。DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Field of Industrial Application) The present invention relates to an improvement in a method for manufacturing a sintered body made of a Ni-Ti shape memory alloy.
［従来の技術ｌ
Ｎｉ−Ｔｉ系形状記憶合金は、一般にＮ１５５％、残部
がｌｉを主体としだ全屈間化合物であるが、加工が可能
である。 とはいえ、冷間加工性はｌｉやＴｉ合金にく
らべて劣るから、均質な材料を得るためには焼鈍加工を
何度も繰り返ず必要があり、これがコストを異常に高く
する。[Prior Art 1] Ni-Ti type shape memory alloys are generally 155% N and the remainder is li and are all intercalary compounds, but they can be processed. However, since its cold workability is inferior to that of Li and Ti alloys, it is necessary to repeat the annealing process many times in order to obtain a homogeneous material, which makes the cost extremely high.
また、Ｎｉが５０〜５２原子％付近でマルテンサイト変
態温度が急激に降下し、物性が大きく変化することが知
られている。 このような組成による変態温度の急激な
変化を避けるために、Ｃ１３０％までと、ｌ、Ｍｎ、Ｂ
、Ｚｒ、ＧＯ。Furthermore, it is known that when Ni is around 50 to 52 atomic percent, the martensitic transformation temperature drops rapidly and the physical properties change significantly. In order to avoid sudden changes in transformation temperature due to such compositions, up to 130% C, l, Mn, B
, Zr, GO.
ＣｒおよびＦｅの少なくとも１種を５．０％以下含有さ
せることにより、変態点をコントロールし、加工性を向
上できることが知られている（特開昭５３−２８５１８
号）。 この場合でも得られる合金の機械加工性は悪く
、たとえばパイプ状に加工することは、材料の歩留りが
低いだけでなく、バイトの摩耗が大きいために非常なコ
スト高を招いている。It is known that by containing at least 5.0% or less of at least one of Cr and Fe, the transformation point can be controlled and workability can be improved (Japanese Patent Laid-Open No. 53-28518
issue). Even in this case, the machinability of the resulting alloy is poor, and machining it into a pipe shape, for example, not only results in a low material yield, but also causes significant wear on the cutting tool, resulting in extremely high costs.
このような問題を解決するため、溶製材料の使用を断念
して粉末冶金法によることにし、Ｎｉ −Ｔｉ系粉末を
ＨＩＰ（熱間静水圧プレス）により加熱成形する方法（
特開昭５６−１０５４４１号）や、１−；、Ｎｉなとの
粉末を混合してホットプレスにより成形する方法（特開
昭５８−６０９５＠など）が提案されている。 しかし
、これらの方法は、いずれも熱間でのプレス工程を含む
から、そのための特殊な設備を必要とし、コストアップ
が避Ｃプられない。 このことはまた、通常のプレス−
焼結工程では焼結体内外の空孔を完全にはなくせないこ
とを意味する。In order to solve these problems, we decided to abandon the use of ingot materials and use a powder metallurgy method, and developed a method in which Ni-Ti powder is heated and formed using HIP (hot isostatic pressing).
JP-A-56-105441) and a method of mixing powders of 1-;, Ni, etc. and molding by hot pressing (JP-A-58-6095@, etc.) have been proposed. However, since all of these methods involve a hot pressing process, special equipment is required for that process, which inevitably increases costs. This also applies to normal press-
This means that the sintering process cannot completely eliminate pores inside and outside the sintered body.
［発明が解決しようとする問題点］
本発明の目的は、熱間プレス装置のような特殊な設備を
必要としないで、Ｎｉ−Ｔｉ系形状記憶合金の焼結体の
空孔を完全にみたしたものを、低減されたコストで製造
できる方法を提供することにある。[Problems to be Solved by the Invention] An object of the present invention is to completely eliminate pores in a sintered body of a Ni-Ti shape memory alloy without requiring special equipment such as a hot press device. The object of the present invention is to provide a method for manufacturing the same at reduced cost.
発明の構成
［問題点を解決するための手段］
本発明のＮｉ−７ｉ系形状記憶合金焼結体の製造方法は
、Ｎ１およびｌｉを主成分とし、ＡｆＪ。Structure of the Invention [Means for Solving the Problems] The method for producing a Ni-7i-based shape memory alloy sintered body of the present invention includes N1 and li as main components, and AfJ.
Ｍｎ、Ｂ、Ｚｒ、Ｖ、Ｇｏ、 ＣｒおよびＦｅの１種ま
たは２種以上：５．０％以下を含有し、残部不可避の不
純物からなる合金粉末原料を加圧成形して圧粉体を形成
し、この圧粉体を焼結することからなり、焼結に際して
圧粉体の空孔にＣｕを含浸させてＣｕ ：０．０５〜
３０％を含有する焼結体を１ｑることを特徴とする。An alloy powder raw material containing one or more of Mn, B, Zr, V, Go, Cr and Fe: 5.0% or less, with the remainder being unavoidable impurities, is press-molded to form a green compact. Then, this green compact is sintered, and during sintering, the pores of the green compact are impregnated with Cu to form a Cu:0.05~
It is characterized by comprising 1q of sintered bodies containing 30%.
Ｎｉ−Ｔｉ系合金粉末を加圧成形してなる圧粉体にＣｕ
を含浸させる第一の手法は、この圧粉体をＣｕ溶揚中に
浸漬することである。 圧粉体の取扱いのため必要があ
れば、いったん仮焼結したのち前記のようにＣ１溶湯中
に浸漬することもできる。 別法としては、圧粉体の内
外をＣｕ粉またはＱｕ板で覆い、圧延成形加工と焼結を
同時に行なうこともできる。 いずれの方法をえらぶか
は、焼結体の形状、寸法、圧粉体の成形条件その他の因
子にもとづいて決定すればよい。Cu is added to a compact formed by pressure forming Ni-Ti alloy powder.
The first method for impregnating Cu is to immerse the green compact in Cu melting. If necessary for the handling of the green compact, it can be temporarily sintered and then immersed in the C1 molten metal as described above. Alternatively, it is also possible to cover the inside and outside of the green compact with Cu powder or a Qu plate, and perform rolling and sintering at the same time. Which method to choose may be determined based on the shape and dimensions of the sintered body, compacting conditions for the compact, and other factors.
焼結処理は、圧粉体へＣｕを含浸させたのち、または含
浸と同時に、通常は真空中またはアルゴンガスのような
不活性雰囲気中、１１００〜１２ｏｏ’ｃの温度に３〜
５時間加熱することによって行なう。 仮焼結は、７０
０℃程度の低温で、１〜３時間行なえば十分である。The sintering process is performed after impregnating the green compact with Cu or simultaneously with the impregnation, usually in a vacuum or in an inert atmosphere such as argon gas, at a temperature of 1100 to 12 oo'C.
This is done by heating for 5 hours. Temporary sintering is 70
It is sufficient to carry out the treatment at a low temperature of about 0° C. for 1 to 3 hours.
圧粉体に含浸させるＣｕは、Ｎｉ−Ｔｉ系形状記・ｎ合
金の特性を損わずに、圧粉体の空孔をふさぎ、焼結体の
強度を高めて加工時に；Ｊ３ける割れの原因を解消し、
被削性を高める効果がある。 焼結に先立ってＣｕを含
浸した場合は、以後の圧粉体の取扱いを容易にする。
従って、圧粉体は、最初からＣｕの一部を含有する合金
原料を使用して、すなわら含浸によるＣｕの増加分をあ
らかじめ減じておいた合金原お１を使用して、製造して
もよい。 「含浸」とは、そのような場合を包含する
。 もちろ／ν、Ｃｕの全ｍを含浸により与えてもよい
。 ＡｆＪ、Ｍｎ 、Ｂ、Ｚｒ 、Ｖ、Ｃｏ 。Cu impregnated into the green compact fills the pores of the green compact without impairing the properties of the Ni-Ti based shape/n alloy, increases the strength of the sintered compact, and prevents cracking during machining; Eliminate the cause,
It has the effect of increasing machinability. When impregnated with Cu prior to sintering, the subsequent handling of the green compact becomes easier.
Therefore, the green compact is produced using an alloy raw material containing a portion of Cu from the beginning, that is, using an alloy raw material 1 in which the increase in Cu due to impregnation has been reduced in advance. Good too. "Impregnation" includes such cases. Mochiro/ν, the total m of Cu may be provided by impregnation. AfJ, Mn, B, Zr, V, Co.
ＯｒおよびＦｅからえらぶ元素は、合金粉末に最初から
添加しておくのが得策である。It is advisable to add elements selected from Or and Fe to the alloy powder from the beginning.
［作 用Ｉ
Ｃｕの含浸により、圧粉体の空孔が完全にふさがれるか
ら、焼結体の強度が増し、加工性も向上する。 ざらに
、Ｃｕの含浸には熱間プレス装置のような特殊な設備は
必要なく、そのための工程を省くことができる。[Function I] Impregnation with Cu completely closes the pores of the green compact, thereby increasing the strength of the sintered compact and improving workability. In general, special equipment such as a hot press device is not required for impregnating Cu, and the process for that purpose can be omitted.
［実施例１１
Ｎｉ：５５％およびＢ：０．３％を含有し残部Ｔｉから
なる合金粉末を、外径１５０ｍのロールを２本そなえた
粉末圧延機で直接圧延して、厚さｌｓＸ幅１００ｍＸ長
ざ３００跡の薄板を製作した。[Example 11] An alloy powder containing 55% Ni and 0.3% B with the balance being Ti was directly rolled in a powder rolling mill equipped with two rolls with an outer diameter of 150 m to a thickness of ls x width of 100 m x We produced a thin plate with a length of 300 marks.
この薄板をＣｕ溶潟中に１０分間浸漬し、Ｃｕを含浸さ
せた。 このＣｕ含浸５５％Ｎｉ −ｌｉ合金薄板を、
真空中１１５０’Ｃで５時間加熱して焼結をした。This thin plate was immersed in a Cu melt lagoon for 10 minutes to impregnate it with Cu. This Cu-impregnated 55% Ni-li alloy thin plate was
Sintering was carried out by heating at 1150'C in vacuum for 5 hours.
ついで、焼結体を冷間で圧延することにより、厚さ０．
３％の薄板をえた。 焼結体の冷間加工性は、きわめて
良好でめった。 この材料のＣｕ合石工は５．３％、変
態点Ａｆは６７°Ｃであり、形状記憶特性は良好であっ
た。Next, the sintered body is cold rolled to a thickness of 0.
A thin plate of 3% was obtained. The cold workability of the sintered body was extremely good. This material had a Cu masonry content of 5.3%, a transformation point Af of 67°C, and good shape memory properties.
［実施例２］
Ｎｉ−Ｔｉ合金（Ｎｉ ５５％）粉末にＺｒ粉末（５％
）とＣｕ粉末（２％）とを混合し、プレス成形により内
径６１Ｍ１、外径１０ｍのパイプを製作した。[Example 2] Zr powder (5%) was added to Ni-Ti alloy (Ni 55%) powder.
) and Cu powder (2%) were mixed and press-molded to produce a pipe with an inner diameter of 61 M1 and an outer diameter of 10 m.
このパイプをＣｕ溶湯に浸漬してＣ０を含浸させたのち
、真空中１２００℃に５時間加熱して焼結し、外径８ｍ
、内径４ｍのパイプを１ｑだ。 この材料のＣＬＪの含
有量は４．５％、変態温度は一２３°Ｃであった。This pipe was immersed in Cu molten metal to impregnate it with CO, and then heated in vacuum to 1200°C for 5 hours to sinter it, with an outer diameter of 8 m.
, a pipe with an inner diameter of 4m costs 1q. The CLJ content of this material was 4.5% and the transformation temperature was -23°C.
［実施例３］
Ｎｉ−７ｉ系合金（Ｎｉ５５％〉粉末にＺｒ粉末（１％
）を混合し、実施例３と同様にプレス成形によって内径
６Ｍ、外径１０ｍのパイプを製作した。[Example 3] Ni-7i alloy (Ni 55%) powder and Zr powder (1%
) were mixed and press-molded in the same manner as in Example 3 to produce a pipe with an inner diameter of 6M and an outer diameter of 10m.
このパイプを真空中７００℃に３時間加熱して仮焼結を
行なったのち、Ｃｕ溶湯に浸漬してＣｕを含浸させた。This pipe was heated in vacuum at 700° C. for 3 hours to perform temporary sintering, and then immersed in Cu molten metal to impregnate it with Cu.
ざらに真空中１２００℃に５時間加熱して焼結し、外径
１２ＩｎＩｎ、内径１０ｍのパイプを得た。The material was roughly heated and sintered at 1200° C. in vacuum for 5 hours to obtain a pipe with an outer diameter of 12 InIn and an inner diameter of 10 m.
この材料のＣＬＪの含有量は２％、変態温度はＯ′Ｃで
あった。The CLJ content of this material was 2% and the transformation temperature was O'C.
［実施例４１
Ｎｉ扮末（５５％）、スポンジＴｉ （４４％）および
Ｍｎ粉末（１％）を混合し、実施例１と同様に圧延して
、薄板（１＃Ｘ １００ｍＸ ３００ｍ＞を製作した。[Example 41] Ni powder (55%), Ti sponge (44%) and Mn powder (1%) were mixed and rolled in the same manner as in Example 1 to produce a thin plate (1# x 100m x 300m). .
この薄板をＣｕ粉末を敷いた基板にのせ、さらに上から
Ｃｕｔ１５′）をふりかけて覆い、真空中１２００℃に
５時間加熱して焼結を行なった。This thin plate was placed on a substrate covered with Cu powder, further covered with Cut 15'), and sintered by heating at 1200°C in vacuum for 5 hours.
焼結体の冷間加工を行なって、厚さ０．３履の薄板を得
た。 この薄板のＣｕ含有ωは３％、変態点（Ａｆ）５
°Ｃであり形状記憶特性は良好であった。The sintered body was cold worked to obtain a thin plate with a thickness of 0.3 mm. The Cu content ω of this thin plate is 3%, and the transformation point (Af) is 5
°C, and the shape memory properties were good.
発明の効果
本発明のｘｒ−Ｔ；系形状記憶合金の焼結体の製造方法
に従えば、溶ｒ！Ａ祠を切削する場合とちがって、材料
のロスが少なく所望の形状の最終製品が１できるという
粉末冶金法の利益は、そのまま享受できる。 その上で
、焼結体の強度が増大し、！ｆＬ３ｉＭなとの加工が容
易になり、ざらに被削性が向上する。 Ｃｕ含浸後の圧
粉体は、崩れる心配なく取扱うことができる。 実施に
熱間のプレス設描を必要としないから、製造コストは低
い。Effects of the Invention According to the method for producing a sintered body of xr-T; type shape memory alloy of the present invention, melt r! Unlike the case of cutting the A-shape, the benefits of powder metallurgy can be enjoyed as is, such as reducing material loss and producing a final product in the desired shape. On top of that, the strength of the sintered body increases! Machining with fL3iM becomes easier, and machinability is greatly improved. The green compact after being impregnated with Cu can be handled without fear of crumbling. Manufacturing costs are low because implementation does not require hot press drawing.
Claims (4)
Ｚｒ，Ｖ，Ｃｏ，ＣｒおよびＦｅの１種または２種以上
：５．０％以下を含有し、残部不可避の不純物からなる
合金粉末原料を加圧成形して圧粉体を形成し、この圧粉
体を焼結することからなり、焼結に際して圧粉体の空孔
にＣｕを含浸させてＣｕ：０．０５〜３０％を含有する
焼結体を得ることを特徴とするＮｉ−Ｔｉ系形状記憶合
金焼結体の製造方法。(1) Main components are Ni and Ti, Al, Mn, B,
An alloy powder raw material containing 5.0% or less of one or more of Zr, V, Co, Cr, and Fe, with the remainder consisting of unavoidable impurities, is press-molded to form a green compact, and this compacted powder is Ni-Ti system, which consists of sintering powder, and is characterized in that during sintering, the pores of the green compact are impregnated with Cu to obtain a sintered body containing 0.05 to 30% Cu. A method for producing a shape memory alloy sintered body.
のち焼結する特許請求の範囲第１項の製造方法。(2) The manufacturing method according to claim 1, wherein the green compact is immersed in Cu molten metal to impregnate it with Cu, and then sintered.
浸漬してＣｕを含浸させる特許請求の範囲第１項の製造
方法。(3) The manufacturing method according to claim 1, wherein a green compact is pre-sintered, and the pre-sintered compact is immersed in Cu molten metal to impregnate it with Cu.
にＣｕを圧粉体に含浸させる特許請求の範囲第１項の製
造方法。(4) The manufacturing method according to claim 1, in which a green compact is covered with Cu powder or a Cu plate, and the green compact is impregnated with Cu at the same time as sintering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10929186A JPH0660324B2 (en) | 1986-05-13 | 1986-05-13 | Method for manufacturing Ni-Ti based shape memory alloy sintered body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10929186A JPH0660324B2 (en) | 1986-05-13 | 1986-05-13 | Method for manufacturing Ni-Ti based shape memory alloy sintered body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62267434A true JPS62267434A (en) | 1987-11-20 |
| JPH0660324B2 JPH0660324B2 (en) | 1994-08-10 |
Family
ID=14506451
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10929186A Expired - Lifetime JPH0660324B2 (en) | 1986-05-13 | 1986-05-13 | Method for manufacturing Ni-Ti based shape memory alloy sintered body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0660324B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103862049A (en) * | 2014-04-02 | 2014-06-18 | 四川大学 | Ni-Ti porous material mini-sized part and sintering method thereof |
| CN109822095A (en) * | 2019-04-04 | 2019-05-31 | 哈尔滨工程大学 | Shape memory alloy particles enhance Cu-base composites and preparation method |
-
1986
- 1986-05-13 JP JP10929186A patent/JPH0660324B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103862049A (en) * | 2014-04-02 | 2014-06-18 | 四川大学 | Ni-Ti porous material mini-sized part and sintering method thereof |
| CN109822095A (en) * | 2019-04-04 | 2019-05-31 | 哈尔滨工程大学 | Shape memory alloy particles enhance Cu-base composites and preparation method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0660324B2 (en) | 1994-08-10 |
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