JP3143727B2 - Light-weight heat-resistant material and its manufacturing method - Google Patents
Light-weight heat-resistant material and its manufacturing methodInfo
- Publication number
- JP3143727B2 JP3143727B2 JP06085851A JP8585194A JP3143727B2 JP 3143727 B2 JP3143727 B2 JP 3143727B2 JP 06085851 A JP06085851 A JP 06085851A JP 8585194 A JP8585194 A JP 8585194A JP 3143727 B2 JP3143727 B2 JP 3143727B2
- Authority
- JP
- Japan
- Prior art keywords
- titanium alloy
- resistant material
- cast
- casting
- manufacturing
- 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.)
- Expired - Lifetime
Links
- 239000003779 heat-resistant material Substances 0.000 title claims description 9
- 238000004519 manufacturing process Methods 0.000 title claims description 6
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 26
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims description 19
- 229910052582 BN Inorganic materials 0.000 claims description 18
- 239000013078 crystal Substances 0.000 claims description 16
- 229910052782 aluminium Inorganic materials 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 8
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 239000010936 titanium Substances 0.000 claims description 4
- 229910052719 titanium Inorganic materials 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 3
- 238000002844 melting Methods 0.000 description 17
- 230000008018 melting Effects 0.000 description 17
- 238000005266 casting Methods 0.000 description 14
- 239000000843 powder Substances 0.000 description 10
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 238000003746 solid phase reaction Methods 0.000 description 5
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229910052786 argon Inorganic materials 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000010671 solid-state reaction Methods 0.000 description 3
- RUDFQVOCFDJEEF-UHFFFAOYSA-N yttrium(III) oxide Inorganic materials [O-2].[O-2].[O-2].[Y+3].[Y+3] RUDFQVOCFDJEEF-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 238000005495 investment casting Methods 0.000 description 2
- 238000005339 levitation Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 1
- 229910000756 V alloy Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000012300 argon atmosphere Substances 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 235000012255 calcium oxide Nutrition 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000007542 hardness measurement Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 238000013001 point bending Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 102220253765 rs141230910 Human genes 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Landscapes
- Manufacture Of Alloys Or Alloy Compounds (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、結晶粒を微細化したチ
タン合金鋳造体である軽量耐熱材料、およびその製造方
法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lightweight heat-resistant material which is a cast titanium alloy having crystal grains refined, and a method for producing the same.
【０００２】[0002]
【従来の技術】鋳造に代表される溶融金属の形状付与
（成形）において、チタン合金など融点の高い材料での
結晶粒径を制御することは極めて難しい。2. Description of the Related Art It is extremely difficult to control the crystal grain size of a material having a high melting point, such as a titanium alloy, in forming (forming) a molten metal represented by casting.
【０００３】一般に鋳造体の結晶粒径を制御するために
は、溶融金属から鋳型への熱流束を制御し、結晶粒の粗
大化や微細化を行っている。また、セラミックス等の高
融点材料を添加することより複合化し、結晶粒を微細化
する方法もある。Generally, in order to control the crystal grain size of a casting, the heat flux from a molten metal to a mold is controlled to make the crystal grains coarse and fine. There is also a method of adding a high melting point material such as ceramics to form a composite and refine crystal grains.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、溶融金
属から鋳型への熱流束を制御する方法では、チタン合金
のような高融点で活性な金属材料を鋳造材料として適用
する場合、成形性や反応面から問題があった。また、セ
ラミックス等の高融点材料を添加する方法では、鋳造さ
れた製品が上記高融点材料の添加の影響を強く受けるた
めに、本来有するべき特性を損なってしまうという問題
があった。However, in the method of controlling the heat flux from the molten metal to the mold, when a high-melting-point active metal material such as a titanium alloy is applied as a casting material, the formability and the reaction surface are not improved. There was a problem from. Further, in the method of adding a high melting point material such as ceramics, there is a problem that the cast product is strongly affected by the addition of the high melting point material, thereby impairing the characteristics which should be originally possessed.
【０００５】[0005]
【課題を解決するための手段】本発明は上記に鑑み提案
されたもので、チタンを主成分とし、アルミニウムが含
有されているチタン合金と、窒化硼素（ＢＮ）とを、固
相状態で反応させた後、溶解して鋳造し、結晶粒を微細
化させたことを特徴とする軽量耐熱材料、およびその製
造方法に関するものである。DISCLOSURE OF THE INVENTION The present invention has been proposed in view of the above, and comprises reacting a titanium alloy containing titanium as a main component and containing aluminum with boron nitride (BN) in a solid state. The present invention relates to a lightweight heat-resistant material characterized by melting, casting and refining crystal grains, and a method for producing the same.
【０００６】本発明に用いるチタン合金としては、上記
のようにチタンを主成分とし、アルミニウムが含有され
ているものであればよく、その他に金属元素或いはセラ
ミックス成分が含まれていてもよい。[0006] As described above, the titanium alloy used in the present invention may be any one containing titanium as a main component and aluminum, and may further contain a metal element or a ceramic component.
【０００７】また、添加するＢＮの性状も特に指定しな
いが、５０μｍ以下の六方晶ＢＮ粉末を使用することが
好ましい。このＢＮ粉末は、粉末のまま添加しても、或
いは予備成形によりペレット状にしたものを添加しても
よい。なお、予備成形する場合には、成形助剤としてア
ルコールなどの揮発性の高い有機溶剤を添加してもよ
い。また、上記ＢＮ粉末の添加量は、前記チタン合金の
重量の１〜０．０１％が好ましく、より好ましくは０．
５〜０．０１％以下がよい。１％以上のＢＮ添加ではチ
タンの窒化物やホウ化物の生成が認められ、硬度が上昇
し、靭性が低下してしまう。また、０．０１％以下では
ＢＮ添加の効果が認められない。Although the properties of the BN to be added are not particularly specified, it is preferable to use a hexagonal BN powder of 50 μm or less. This BN powder may be added as it is or in the form of pellets by pre-molding. In the case of preforming, a highly volatile organic solvent such as alcohol may be added as a molding aid. The amount of the BN powder to be added is preferably 1% to 0.01%, more preferably 0.1% by weight of the titanium alloy.
The content is preferably 5 to 0.01% or less. When 1% or more of BN is added, formation of titanium nitride or boride is recognized, and the hardness increases and the toughness decreases. When the content is 0.01% or less, the effect of BN addition is not recognized.
【０００８】さらに、本発明に用いる溶解装置（炉）
は、固相反応後の溶解時に均一な組成になるように高周
波溶解など電磁攪拌作用のあるものが好ましいが、チタ
ン合金の融点以上の加熱が可能であれば抵抗加熱炉でも
構わない。また、るつぼは活性なチタン合金との反応を
避けるため、水冷銅るつぼが好ましいが、酸化物或いは
炭化物のるつぼでも良い。Further, a melting apparatus (furnace) used in the present invention.
Is preferably one having an electromagnetic stirring action such as high-frequency melting so as to have a uniform composition at the time of melting after the solid phase reaction. However, a resistance heating furnace may be used as long as heating at a temperature higher than the melting point of the titanium alloy is possible. The crucible is preferably a water-cooled copper crucible to avoid a reaction with the active titanium alloy, but may be an oxide or carbide crucible.
【０００９】上記原材料および装置を用いて軽量耐熱材
料を作製する一例を以下に示す。An example of producing a lightweight heat-resistant material using the above-mentioned raw materials and equipment will be described below.
【００１０】まず、チタン合金およびその１〜０．０１
重量％以下のＢＮ粉末を溶解装置中に設置し、温度を上
げる。溶解装置内の雰囲気を減圧アルゴン雰囲気か高純
度アルゴンガス気流中としてコールドクルーシブルレビ
テーション（ＣＣＬ）溶解を行う。そして、チタン合金
およびＢＮ粉末は、それぞれの融点以下である１５００
℃付近で固相反応を生じる。この固相反応は大きな発熱
を伴うため、チタン合金の一部溶解が生じる。First, a titanium alloy and its 1 to 0.01
The BN powder of not more than% by weight is placed in the melting apparatus and the temperature is raised. Cold crucible levitation (CCL) dissolution is performed by setting the atmosphere in the dissolution apparatus to a reduced-pressure argon atmosphere or a high-purity argon gas stream. The titanium alloy and the BN powder have a melting point of 1500 or less, respectively.
A solid-state reaction occurs around ℃. Since this solid-phase reaction involves a large amount of heat, the titanium alloy is partially melted.
【００１１】さらに、溶解装置の温度を上昇させると、
全体が溶解する。Further, when the temperature of the melting apparatus is increased,
The whole dissolves.
【００１２】次に、得られた溶融金属（溶湯）を、イッ
トリアやカルシアなどのチタン合金と反応しにくい（低
反応性の）鋳型中に鋳造（注湯）する。Next, the obtained molten metal (molten metal) is cast (poured) into a mold (reactive) that does not easily react with titanium alloys such as yttria and calcia.
【００１３】こうして鋳造された軽量耐熱材料は、組織
観察や硬度測定などにより結晶粒径が微細化したチタン
合金鋳造体であることが確認された。The light-weight heat-resistant material thus cast was confirmed to be a titanium alloy cast having a reduced crystal grain size by microstructure observation and hardness measurement.
【００１４】このように本発明は、チタン合金を少量の
ＢＮ粉末とともに鋳造することにより、チタン合金の特
性を損なうことなく結晶粒を微細化できることを見出し
たものである。As described above, the present invention has found that by casting a titanium alloy with a small amount of BN powder, crystal grains can be refined without impairing the properties of the titanium alloy.
【００１５】なお、本発明の軽量耐熱材料の製造方法
は、前記の方法に限定するものではない。例えば、チタ
ン合金の融点以上の加熱が可能な抵抗加熱炉を用いてチ
タン合金の融点以上の高温で鋳造してもよい。また、鋳
型内面にＢＮを塗布してチタン合金を鋳造してもよく、
この場合、表面層のみ結晶を微細化した鋳造体が得られ
る。The method for producing a lightweight heat-resistant material according to the present invention is not limited to the above method. For example, casting may be performed at a high temperature equal to or higher than the melting point of the titanium alloy using a resistance heating furnace capable of heating the melting point of the titanium alloy or higher. Alternatively, BN may be applied to the inner surface of the mold to cast a titanium alloy,
In this case, a cast in which only the surface layer is made finer is obtained.
【００１６】[0016]
【実施例】以下、実施例により本発明をさらに詳細に説
明する。The present invention will be described in more detail with reference to the following examples.
【００１７】［実施例１］まず、Ｔｉ−３４ｗｔ％Ａｌ
合金８０ｇに、ＢＮ粉末（昭和電工製『ＵＨＰ−１』）
０．４ｇをハンドプレスにより円柱形状に予備成形した
後、添加し、高純度アルゴンガス気流（５ｌ／ｍｉｎ）
中で水冷銅るつぼを用いた高周波溶解装置によりコール
ドクルーシブルレビテーション（ＣＣＬ）溶解させた。
チタン合金とＢＮ粉末との固相反応は１５００℃で生
じ、１５７０℃まで加熱して完全に溶解させた。次に、
この溶湯を、イットリアとジルコニアとでできた精密鋳
造用鋳型中に注湯した後、自然冷却し、鋳造体を取り出
した。Example 1 First, Ti-34 wt% Al
80 g of alloy, BN powder ("UHP-1" manufactured by Showa Denko)
0.4 g was preformed into a cylindrical shape by a hand press and then added, and a high-purity argon gas stream (5 l / min) was added.
Cold crucible levitation (CCL) was melted by a high-frequency melting apparatus using a water-cooled copper crucible in the inside.
The solid state reaction between the titanium alloy and the BN powder occurred at 1500 ° C. and was completely dissolved by heating to 1570 ° C. next,
The molten metal was poured into a precision casting mold made of yttria and zirconia, and then naturally cooled, and the cast was taken out.
【００１８】得られた鋳造体の結晶粒径は光学顕微鏡に
よる観察から２０μｍ以下であり、同様なプロセスで得
られた（ＢＮを添加していない）Ｔｉ−３４ｗｔ％Ａｌ
鋳造体の１０分の１程度であった。ＢＮの添加による組
織の変化はなく、α2 とγのラメラ構造組織を呈してい
た。結晶粒の微細化により硬度は３００Ｈｖとなり、Ｔ
ｉ−３４ｗｔ％Ａｌ鋳造体より１００Ｈｖ程度上昇し
た。しかし、３点曲げ試験による抗折力はＴｉ−３４ｗ
ｔ％Ａｌ鋳造体と殆ど変わらず、靭性を損なわず高硬度
化できた。The crystal grain size of the obtained cast body is 20 μm or less as observed by an optical microscope, and Ti-34 wt% Al (without adding BN) obtained by the same process.
It was about one-tenth of the casting. Change in tissue by the addition of BN is not had exhibited a lamellar structural organization of alpha 2 and gamma. Due to the refinement of the crystal grains, the hardness becomes 300 Hv, and T
It increased about 100 Hv from the i-34 wt% Al casting. However, the bending strength by the three-point bending test is Ti-34w
The hardness was almost the same as that of the t% Al cast, and the hardness was increased without impairing the toughness.
【００１９】［実施例２］まず、Ｔｉ−６ｗｔ％Ａｌ−
４ｗｔ％Ｖ合金８０ｇに、ＢＮ粉末（昭和電工製『ＵＨ
Ｐ−１』）０．３ｇをハンドプレスにより円柱形状に予
備成形した後、添加し、高純度アルゴンガス気流（５ｌ
／ｍｉｎ）中で水冷銅るつぼを用いた高周波溶解装置に
よりＣＣＬ溶解させた。チタン合金とＢＮ粉末との固相
反応は１５００℃で生じ、１５７０℃まで加熱して完全
に溶解させた。次に、この溶湯を、イットリアとジルコ
ニアとでできた精密鋳造用鋳型中に注湯した後、自然冷
却し、鋳造体を取り出した。Example 2 First, Ti-6 wt% Al-
80 g of a 4 wt% V alloy was mixed with BN powder ("UH" manufactured by Showa Denko
P-1 ") was preliminarily formed into a cylindrical shape by hand pressing into 0.3 g, and then added, and a high-purity argon gas stream (5 l) was added.
/ Min), and CCL was dissolved by a high-frequency melting apparatus using a water-cooled copper crucible. The solid state reaction between the titanium alloy and the BN powder occurred at 1500 ° C. and was completely dissolved by heating to 1570 ° C. Next, the molten metal was poured into a precision casting mold made of yttria and zirconia, and then naturally cooled to take out a casting.
【００２０】得られた鋳造体の結晶粒径は、同様なプロ
セスで得られた（ＢＮを添加していない）Ｔｉ−６ｗｔ
％Ａｌ−４ｗｔ％Ｖ鋳造体の１０分の８程度であった。
硬度は３００Ｈｖであり、１００Ｈｖ程度上昇した。ま
た、抗折力はＴｉ−６ｗｔ％Ａｌ−４ｗｔ％Ｖ鋳造体と
殆ど変わらないことが確認された。The crystal grain size of the cast body obtained was the same as that of Ti-6 wt.
% Al-4 wt% V, which was about 8/10 of that of the V cast.
The hardness was 300 Hv and increased by about 100 Hv. Further, it was confirmed that the transverse rupture strength was almost the same as that of the Ti-6 wt% Al-4 wt% V cast.
【００２１】以上本発明の実施例を示したが、本発明は
前記した実施例に限定されるものではなく、特許請求の
範囲に記載した構成を変更しない限りどのようにでも実
施することができる。Although the embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and can be implemented in any manner unless the configuration described in the claims is changed. .
【００２２】[0022]
【発明の効果】以上説明したように本発明は、微細結晶
を有するチタン合金鋳造体を通常のプロセスで製造する
ことができるものである。即ち、上記微細結晶を有する
チタン合金鋳造体は従来では急速冷却しなければ得られ
なかったのであるが、本発明では鋳造条件の厳しい高融
点で活性なチタン合金鋳造体の結晶粒径を極めて容易に
制御できるものである。したがって、本発明の製造方法
は、極めて実用的価値が高いので、チタン合金鋳造体の
用途拡大が見込まれ、このような軽量耐熱材料の適用に
よってもたらされる工業上の効果は極めて多大なものに
なるものと期待される。As described above, according to the present invention, a titanium alloy casting having fine crystals can be manufactured by an ordinary process. That is, a titanium alloy casting having the above-mentioned fine crystals could not be obtained without rapid cooling in the past, but in the present invention, the crystal grain size of a high melting point active titanium alloy casting under severe casting conditions is extremely easy. Can be controlled. Therefore, since the production method of the present invention has extremely high practical value, it is expected that the use of titanium alloy castings will be expanded, and the industrial effects brought by the use of such lightweight heat-resistant materials will be extremely large. Expected.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 三輪 謙治 愛知県名古屋市名東区梅森坂二丁目1030 番地 (56)参考文献 特開 平５−140670（ＪＰ，Ａ) 特開 平４−218634（ＪＰ，Ａ) 特開 平５−255780（ＪＰ，Ａ) 特開 平５−93232（ＪＰ，Ａ) 特公 昭53−8644（ＪＰ，Ｂ１) (58)調査した分野(Int.Cl.7，ＤＢ名) C22C 14/00 C22F 1/18 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kenji Miwa 2-1030 Umemorizaka, Meito-ku, Nagoya City, Aichi Prefecture (56) References JP-A-5-140670 (JP, A) JP-A-4-218634 (JP, A) JP-A-5-255780 (JP, A) JP-A-5-93232 (JP, A) JP-B-53-8644 (JP, B1) (58) Fields investigated (Int. Cl. 7 , DB name) ) C22C 14/00 C22F 1/18
Claims (2)
有されているチタン合金と、窒化硼素とを、固相状態で
反応させた後、溶解して鋳造し、結晶粒を微細化させた
ことを特徴とする軽量耐熱材料。1. A method in which a titanium alloy containing titanium as a main component and aluminum is reacted with boron nitride in a solid state, and then melted and cast to refine crystal grains. Characterized lightweight heat-resistant material.
有されているチタン合金と、窒化硼素とを、固相状態で
反応させた後、溶解して鋳造し、結晶粒を微細化させる
ことを特徴とする軽量耐熱材料の製造方法。2. A method in which a titanium alloy containing titanium as a main component and aluminum is reacted with boron nitride in a solid state, and then melted and cast to refine crystal grains. Manufacturing method of lightweight heat resistant material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06085851A JP3143727B2 (en) | 1994-03-30 | 1994-03-30 | Light-weight heat-resistant material and its manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06085851A JP3143727B2 (en) | 1994-03-30 | 1994-03-30 | Light-weight heat-resistant material and its manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07268517A JPH07268517A (en) | 1995-10-17 |
| JP3143727B2 true JP3143727B2 (en) | 2001-03-07 |
Family
ID=13870381
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP06085851A Expired - Lifetime JP3143727B2 (en) | 1994-03-30 | 1994-03-30 | Light-weight heat-resistant material and its manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3143727B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010059456A (en) * | 2008-09-02 | 2010-03-18 | Seiko Epson Corp | Titanium sintered compact and method of producing the same |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS538644A (en) * | 1976-07-13 | 1978-01-26 | Denki Kagaku Kogyo Kk | Vulcanizable liquid chloroprene rubber composition |
| JP3006120B2 (en) * | 1990-05-18 | 2000-02-07 | トヨタ自動車株式会社 | Ti-Al alloy and method for producing the same |
| US5082624A (en) * | 1990-09-26 | 1992-01-21 | General Electric Company | Niobium containing titanium aluminide rendered castable by boron inoculations |
| JPH05140670A (en) * | 1991-11-15 | 1993-06-08 | Toyota Motor Corp | Method for producing Ti-Al alloy |
| JPH05255780A (en) * | 1991-12-27 | 1993-10-05 | Nippon Steel Corp | High strength titanium alloy with uniform microstructure |
-
1994
- 1994-03-30 JP JP06085851A patent/JP3143727B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07268517A (en) | 1995-10-17 |
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