JPH0641661A - Ti / Al-based intermetallic compound material and its processing method - Google Patents
Ti / Al-based intermetallic compound material and its processing methodInfo
- Publication number
- JPH0641661A JPH0641661A JP12654891A JP12654891A JPH0641661A JP H0641661 A JPH0641661 A JP H0641661A JP 12654891 A JP12654891 A JP 12654891A JP 12654891 A JP12654891 A JP 12654891A JP H0641661 A JPH0641661 A JP H0641661A
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Abstract
(57)【要約】
【構成】 １〜５％（重量）のＭｎを含有するＴｉ3 Ａ
ｌ相とＴｉＡｌ相との二相からなる材料。または、恒温
鍛造、熱処理製品。さらには、１〜５％（重量）のＭｎ
を含有するＴｉ3 Ａｌ相単相材料。
【効果】 優れた電解加工性が実現される。(57) [Summary] [Structure] Ti 3 A containing 1 to 5% (by weight) of Mn
A material consisting of two phases, an l phase and a TiAl phase. Or constant temperature forged and heat treated products. Furthermore, 1-5% (by weight) Mn
Ti 3 Al phase single phase material containing. [Effect] Excellent electrolytic processability is realized.
Description
【産業上の利用分野】この発明は、Ｔｉ／Ａｌ基金属間
化合物材料とその加工法に関するものである。さらに詳
しくは、この発明は、航空機材料等として有用な、軽
量、かつ高靭性材料としての加工性に優れたＴｉ／Ａｌ
基金属間化合物材料とその電解加工法に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a Ti / Al-based intermetallic compound material and its processing method. More specifically, the present invention provides a Ti / Al which is useful as an aircraft material and the like, which is lightweight and excellent in workability as a high toughness material.
The present invention relates to a base intermetallic compound material and its electrolytic processing method.
【従来の技術とその課題】Ｔｉ／Ａｌ基の金属間化合物
材料は軽量で高靭性であるため、航空機材料としての可
能性が高いが、機械加工による成形が困難である。これ
を補う手段として電解加工が考えられるが、Ｔｉ／Ａｌ
基材料はそのままでは電解加工性がよくない。そこで、
このような加工性の欠点を解消するための試みがなされ
てきているが、現在までのところ、そのための有効な手
段は見出されていないのが実情である。たとえば、この
Ｔｉ／Ａｌ系の金属間化合物のうちでもＴｉ3 Ａｌ相、
ＴｉＡｌ相もしくは両者の混合相を基とするものは軽量
で、しかも硬さ、剛性、強度、靭性などを総合した特性
が優れているために、多くの産業上の分野で実用化され
ている。しかし、これらの用途の点から見て有利な特性
は、これを用いて所要の形状の部材を製造しようとする
場合には必ずしも有利に作用せず、特に機械加工の場合
には工具の消耗、製造期間の長期化とこれに伴う加工経
費の増大という問題を生じた。これを補う対策として、
電解質の水溶液の中でこの材料を陽極として電気化学的
に成形加工を行なおうという、いわゆる電解加工が試み
られている。しかしながら、上記の材料は必ずしも電解
加工性が優れず、加工に長時間を要するという欠点があ
った。この発明はこのような欠点を克服することを目的
とするものである。さらに詳しくは、この発明は、従来
のＴｉ／Ａｌ基金属間化合物の欠点を克服し、加工性の
良好な、軽量、かつ高靭性特性を有する新しい金属間化
合物を提供することを目的としてている。2. Description of the Related Art Since Ti / Al-based intermetallic compound materials are lightweight and have high toughness, they are highly likely to be aircraft materials, but they are difficult to form by machining. Electrolytic processing is considered as a means to compensate for this, but Ti / Al
The base material as it is does not have good electrolytic processability. Therefore,
Attempts have been made to eliminate such defects of workability, but up to now, no effective means for this has been found. For example, among the Ti / Al-based intermetallic compounds, the Ti 3 Al phase,
A material based on the TiAl phase or a mixed phase of both is lightweight and has excellent properties in which hardness, rigidity, strength, toughness, etc. are integrated, and therefore it has been put to practical use in many industrial fields. However, the advantageous properties from the point of view of these applications do not always work well when trying to produce parts of the required shape using them, especially in the case of machining, tool wear, There was a problem that the manufacturing period was prolonged and the processing cost was increased accordingly. As a measure to supplement this,
So-called electrolytic processing has been attempted, in which this material is used as an anode in an aqueous solution of an electrolyte to perform electrochemical forming processing. However, the above-mentioned materials are not necessarily excellent in electrolytic processability, and there is a defect that processing takes a long time. The present invention aims to overcome such drawbacks. More specifically, the present invention aims to provide a new intermetallic compound that overcomes the drawbacks of conventional Ti / Al-based intermetallic compounds and has good workability, light weight, and high toughness characteristics. .
【課題を解決するための手段】この発明は、上記の課題
を解決するものとして、Ｍｎを１〜５重量％含有するＴ
ｉ3 Ａｌ相とＴｉＡｌ相の二相からなることを特徴とす
るＴｉ／Ａｌ基金属間化合物材料とその電解加工法を提
供する。また、この発明は、このＴｉ／Ａｌ基材料を、
1100℃以上の温度において５×１０-4〜５×１０-3の速
度で当初の厚さの４０〜１５％まで恒温鍛造してなるこ
とや、さらには、真空中もしくは不活性ガス中で1200〜
1400℃の温度で６０分以上保持してなることを特徴とす
る電解加工性の良好なＴｉ／Ａｌ基材料とその電解加工
法を提供する。そして、また、この発明は、Ｍｎを１〜
５重量％含有してなるＴｉ3 Ａｌ相単相からなることを
特徴とするＴｉ／Ａｌ基金属間化合物材料を提供する。
すなわち、この発明の発明者は、Ｔｉ／Ａｌ系の金属間
化合物に第３の元素を添加することによって電解加工
性、特に電解加工の速度を向上させることを試みてき
た。その結果、Ｔｉ／Ａｌ系の金属間化合物のうちＴｉ
3 Ａｌ相、ＴｉＡｌ相およびこれらの両相の混合相から
構成される材料についてはＭｎの添加がこの目的に特に
有効であることを見出しこの発明を完成した。以上の通
りのこの発明においては、Ｍｎの添加量は多いほど有効
であり、添加量が重量で１％以下の場合はその効果が顕
著でない。しかし、Ｍｎを過度に添加し、Ｔｉ3 Ａｌ相
もしくはＴｉＡｌ相以外の相が現われるようになるとむ
しろ有害であって、このような場合は電解加工が均一に
進行せず、電解加工の仕上りが思わしくない。電解加工
の速度は材料の組織に依存するが、一般に粗大な結晶粒
の材料は電解加工速度が小さく、不均質な組織の材料は
電解加工の仕上りも不均質である。そのため、Ｍｎを添
加した材料を鋳造で作製する場合はこれを恒温鍛造して
結晶粒を細かくすることは電解加工速度の向上にとって
極めて有益である。この際の恒温鍛造の条件は注意を要
するものであって、温度や変形速度、圧下率などが適当
でないと、素材にひび割れが生じ、所期の電解加工を行
なうことが不可能となる。この発明の発明者の経験によ
れば、この恒温鍛造は温度1100℃以上、変形速度５×１
０-4〜５×１０-3、圧下率４０〜１５％で行なうのが適
当である。ただし、Ｍｎ添加の有益性は恒温鍛造材に限
られるものではなく、鋳造材のままでも有効であり、ま
た、恒温鍛造材を組織を整える目的でさらに熱処理して
得られた材料についても有効である。この場合熱処理は
真空中もしくは不活性ガス中で1200〜1400℃で少なくと
も６０分行なうことが有効である。酸化雰囲気中でこれ
を行なうことは材料の酸化につながるほか、時によって
は表面に酸化物膜が形成され、これが電解加工性を劣化
させる。熱処理の温度は熱処理の目的によってやや異な
るが、いずれにしろ1400℃を越えると材料が不均質とな
ることがあり、電解加工に有害である。なお、熱処理は
本来組織を整えるものであるから、恒温鍛造の温度をあ
る程度越えなければ意義が薄く、この点から少なくとも
1200℃の温度は必要である。電解加工については、その
条件は特に限定されることはない。素材を電解質を含む
溶液の中で陽極として電解できるものであれば特別な限
定はない。しかし、３〜６Ｎの硫酸水溶液を使用する方
法は環境汚染などの点から特に問題が少なく、５〜４０
℃の広い範囲の室温でこれを行なうことができる。温度
がこの範囲を越えても、電解加工は可能であるが、溶液
から有害な蒸気が発生するため、特別な対策が必要とな
る。電解加工の電位は特に重要な因子で、溶液に対して
0.4〜0.6Ｖ（ＳＣＥ）の範囲外の電位では電解加工の速
度は著しく低下する。以下、実施例によりさらに詳しく
この発明について説明する。In order to solve the above-mentioned problems, the present invention contains T containing 1 to 5% by weight of Mn.
There is provided a Ti / Al-based intermetallic compound material characterized by comprising two phases, i 3 Al phase and TiAl phase, and an electrolytic processing method thereof. In addition, the present invention uses the Ti / Al-based material
At a temperature of 1100 ° C. or higher, isothermal forging is performed at a speed of 5 × 10 −4 to 5 × 10 −3 to 40 to 15% of the initial thickness, and further, it is 1200 in a vacuum or an inert gas. ~
Provided is a Ti / Al-based material having good electrolytic processability, characterized by being held at a temperature of 1400 ° C. for 60 minutes or more, and an electrolytic process method thereof. Further, the present invention also sets Mn to 1 to
There is provided a Ti / Al-based intermetallic compound material characterized by comprising a Ti 3 Al phase single phase containing 5% by weight.
That is, the inventor of the present invention has attempted to improve the electrolytic processability, particularly the electrolytic process speed, by adding the third element to the Ti / Al-based intermetallic compound. As a result, Ti out of the Ti / Al-based intermetallic compounds
The inventors have found that the addition of Mn is particularly effective for this purpose in materials composed of 3 Al phase, TiAl phase and mixed phases of these two phases, and completed the present invention. In the present invention as described above, the larger the added amount of Mn is, the more effective it is. When the added amount is 1% or less by weight, the effect is not remarkable. However, if Mn is excessively added and a phase other than the Ti 3 Al phase or the TiAl phase appears, it is rather harmful. In such a case, the electrolytic processing does not proceed uniformly, and the finish of the electrolytic processing is not good. Absent. The speed of electrolytic processing depends on the structure of the material. Generally, a material having a coarse crystal grain has a low electrolytic processing speed, and a material having a non-uniform structure has a non-uniform electrolytic processing finish. Therefore, when a material added with Mn is produced by casting, isothermal forging of the material to make the crystal grains fine is extremely useful for improving the electrolytic processing speed. At this time, the isothermal forging condition needs to be careful. If the temperature, the deformation rate, the rolling reduction, etc. are not appropriate, the material will crack and it will be impossible to carry out the intended electrolytic processing. According to the experience of the inventor of the present invention, this isothermal forging has a temperature of 1100 ° C. or higher and a deformation rate of 5 × 1.
It is suitable to carry out at 0 −4 to 5 × 10 −3 and a reduction rate of 40 to 15%. However, the benefit of adding Mn is not limited to the isothermal forged material, and is effective even as a cast material, and is also effective for the material obtained by further heat treating the isothermal forged material for the purpose of adjusting the structure. is there. In this case, it is effective to perform the heat treatment at 1200 to 1400 ° C. for at least 60 minutes in vacuum or in an inert gas. Doing this in an oxidizing atmosphere leads to the oxidation of the material, and sometimes an oxide film is formed on the surface, which deteriorates the electrolytic processability. The temperature of the heat treatment varies slightly depending on the purpose of the heat treatment, but in any case, if the temperature exceeds 1400 ° C, the material may become inhomogeneous, which is harmful to electrolytic processing. Since the heat treatment originally prepares the structure, it is of little significance unless it exceeds the temperature of isothermal forging to some extent.
A temperature of 1200 ° C is necessary. The conditions for electrolytic processing are not particularly limited. There is no particular limitation as long as the material can be electrolyzed as an anode in a solution containing an electrolyte. However, the method of using a 3 to 6 N sulfuric acid aqueous solution is less problematic in terms of environmental pollution and the like.
This can be done at room temperature over a wide range of ° C. Even if the temperature exceeds this range, electrolytic processing is possible, but since harmful vapor is generated from the solution, special measures are required. The potential of electrolytic processing is a particularly important factor,
At a potential outside the range of 0.4 to 0.6 V (SCE), the speed of electrolytic processing is significantly reduced. Hereinafter, the present invention will be described in more detail with reference to Examples.
実施例１ ３４％のＡｌを含むＴｉの２％をＭｎで置換した合金を
素材として鋳造した後円筒形に加工し、５×１０-3／mi
n の速度で当初の厚さの２０％の厚さになるまで恒温鍛
造した。これを２０℃で５Ｎの硫酸中で−0.5Ｖ（ＳＣ
Ｅ）の電位で３時間電解加工し３６クーロン／cm2 の電
解減量を得た。同じ条件でＭｎで置き換えなかったもの
の電解加工減量は２０クーロン／cm2 であった。（電解
減量現在細かい数字を計算中ですが、約２５％の増加で
す） 実施例２ 実施例１で用いたものと同じＭｎ置換の素材を真空中で
1300℃で１時間熱処理した後、２０℃で５Ｎの硫酸中で
−0.50Ｖ（ＳＣＥ）の電位で５時間電解加工し３２クー
ロン／cm2 の電解減量を得た。同条件でＭｎで置き換え
ないものの電解加工減量は１７クーロン／cm2 であっ
た。Example 1 An alloy obtained by substituting 2% of Ti containing 34% of Al by Mn was cast as a raw material and then processed into a cylindrical shape at 5 × 10 −3 / mi.
Isothermal forging was performed at a speed of n until the thickness reached 20% of the initial thickness. This was stored in 5 N sulfuric acid at -0.5 V (SC
Electrolytic processing was performed for 3 hours at the potential of E) to obtain an electrolytic weight loss of 36 coulomb / cm 2 . Although not replaced with Mn under the same conditions, the electrolytic processing weight loss was 20 coulomb / cm 2 . (Electrolysis weight reduction is currently calculating a fine number, but it is an increase of about 25%) Example 2 The same Mn-substituted material used in Example 1 was vacuumed.
After heat treatment at 1300 ° C. for 1 hour, electrolytic processing was performed at 20 ° C. in 5N sulfuric acid at a potential of −0.50 V (SCE) for 5 hours to obtain an electrolytic weight loss of 32 coulomb / cm 2 . The electrolytic processing weight loss was 17 coulombs / cm 2 although it was not replaced with Mn under the same conditions.
【発明の効果】この発明により、以上詳しく説明した通
り、電解加工性に優れたＴｉ／Ａｌ基金属間化合物材料
が実現される。また、生産、加工コストの低減が図られ
る。As described in detail above, according to the present invention, a Ti / Al-based intermetallic compound material excellent in electrolytic processability is realized. In addition, production and processing costs can be reduced.
Claims (10)
相とＴｉＡｌ相の二相からなることを特徴とするＴｉ／
Ａｌ基金属間化合物材料。1. Ti 3 Al containing 1 to 5% by weight of Mn.
Phase / TiAl phase characterized by being composed of two phases Ti /
Al-based intermetallic compound material.
おいて５×１０-4〜５×１０-3の速度で当初の厚さの４
０〜１５％まで恒温鍛造してなることを特徴とする電解
加工性の良好なＴｉ／Ａｌ基材料。2. The material of claim 1 at a temperature of 1100 ° C. or higher at a rate of 5 × 10 −4 to 5 × 10 −3 , with an initial thickness of 4.
A Ti / Al-based material having good electrolytic processability, characterized by being subjected to constant temperature forging up to 0 to 15%.
性ガス中で1200〜1400℃の温度で６０分以上保持してな
ることを特徴とする電解加工性の良好なＴｉ／Ａｌ基材
料。3. A Ti / Al-based material having good electrolytic processability, characterized in that the material according to claim 2 is held in vacuum or in an inert gas at a temperature of 1200 to 1400 ° C. for 60 minutes or more. .
して硫酸の存在下に電解加工することを特徴とするＴｉ
／Ａｌ基材料の加工法。4. A Ti characterized by being electrolytically processed in the presence of sulfuric acid, using the material according to claim 1, 2 or 3 as an anode.
/ Processing method of Al-based material.
温度において電解加工する請求項４の加工法。5. The processing method according to claim 4, wherein the electrolytic processing is carried out at a temperature of 5 to 40 ° C. in the presence of 1 to 6 N sulfuric acid.
Ａｌ相単相からなることを特徴とするＴｉ／Ａｌ基金属
間化合物材料。6. Ti 3 containing 1 to 5% by weight of Mn.
A Ti / Al-based intermetallic compound material comprising an Al phase single phase.
おいて、５×１０-4〜５×１０-3の速度で当初の厚さの
４０〜１５％まで恒温鍛造してなることを特徴とする電
解加工性の良好なＴｉ／Ａｌ基材料。7. The material according to claim 6 is isothermally forged at a temperature of 1100 ° C. or higher at a speed of 5 × 10 −4 to 5 × 10 −3 to 40 to 15% of the initial thickness. A characteristic Ti / Al-based material having good electrolytic processability.
性ガス中で1200〜1400℃の温度で６０分以上保持してな
ることを特徴とする電解加工性の良好なＴｉ／Ａｌ基材
料。8. A Ti / Al-based material having good electrolytic processability, which is obtained by holding the material of claim 7 in a vacuum or an inert gas at a temperature of 1200 to 1400 ° C. for 60 minutes or more. .
在下に電解加工することを特徴とするＴｉ／Ａｌ基材料
の加工法。9. A method for processing a Ti / Al-based material, which comprises electrolytically processing the material according to claim 6, 7 or 8 in the presence of sulfuric acid.
の温度において電解加工する請求項９の加工法。10. 5-40 ° C. in the presence of 1-6 N sulfuric acid
The processing method according to claim 9, wherein the electrolytic processing is performed at the temperature of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3126548A JPH0791609B2 (en) | 1991-05-01 | 1991-05-01 | Ti / Al-based intermetallic compound material for electrolytic processing and its manufacturing method and processing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3126548A JPH0791609B2 (en) | 1991-05-01 | 1991-05-01 | Ti / Al-based intermetallic compound material for electrolytic processing and its manufacturing method and processing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0641661A true JPH0641661A (en) | 1994-02-15 |
| JPH0791609B2 JPH0791609B2 (en) | 1995-10-04 |
Family
ID=14937904
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3126548A Expired - Lifetime JPH0791609B2 (en) | 1991-05-01 | 1991-05-01 | Ti / Al-based intermetallic compound material for electrolytic processing and its manufacturing method and processing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0791609B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0570912A (en) * | 1991-09-12 | 1993-03-23 | Sumitomo Metal Ind Ltd | Manufacture of ti-al intermetallic compound base alloy |
| US6669791B2 (en) | 2000-02-23 | 2003-12-30 | Mitsubishi Heavy Industries, Ltd. | TiAl based alloy, production process therefor, and rotor blade using same |
| WO2018043187A1 (en) | 2016-09-02 | 2018-03-08 | 株式会社Ihi | Tial alloy and method for producing same |
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| JPS6270531A (en) * | 1985-09-24 | 1987-04-01 | Sumitomo Light Metal Ind Ltd | Formation of ti-al intermetallic compound member |
| JPS63171862A (en) * | 1987-01-08 | 1988-07-15 | Nkk Corp | Method for manufacturing TiA single-base heat-resistant alloy |
| JPH02101134A (en) * | 1988-10-05 | 1990-04-12 | Daido Steel Co Ltd | heat resistant composite material |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5616700A (en) * | 1979-07-19 | 1981-02-17 | Urarusukii N Itsusureedowachie | Electrolysis liquid for electrochemical polishing of titanium or titanium alloy article |
| JPS6141740A (en) * | 1984-08-02 | 1986-02-28 | Natl Res Inst For Metals | Intermetallic tial compound-base heat resistant alloy |
| JPS6270531A (en) * | 1985-09-24 | 1987-04-01 | Sumitomo Light Metal Ind Ltd | Formation of ti-al intermetallic compound member |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0570912A (en) * | 1991-09-12 | 1993-03-23 | Sumitomo Metal Ind Ltd | Manufacture of ti-al intermetallic compound base alloy |
| US6669791B2 (en) | 2000-02-23 | 2003-12-30 | Mitsubishi Heavy Industries, Ltd. | TiAl based alloy, production process therefor, and rotor blade using same |
| WO2018043187A1 (en) | 2016-09-02 | 2018-03-08 | 株式会社Ihi | Tial alloy and method for producing same |
| US11078563B2 (en) | 2016-09-02 | 2021-08-03 | Ihi Corporation | TiAl alloy and method of manufacturing the same |
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| Publication number | Publication date |
|---|---|
| JPH0791609B2 (en) | 1995-10-04 |
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| Date | Code | Title | Description |
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| EXPY | Cancellation because of completion of term |