JPH0559466A - Production of low oxygen ti-al alloy and low oxygen ti-al alloy - Google Patents
Production of low oxygen ti-al alloy and low oxygen ti-al alloyInfo
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- JPH0559466A JPH0559466A JP24486191A JP24486191A JPH0559466A JP H0559466 A JPH0559466 A JP H0559466A JP 24486191 A JP24486191 A JP 24486191A JP 24486191 A JP24486191 A JP 24486191A JP H0559466 A JPH0559466 A JP H0559466A
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- alloy
- molten metal
- oxygen
- melting
- final target
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は低酸素Ｔｉ−Ａｌ系合金
の製造方法に関し、さらに詳しくは、軽量耐熱材料、お
よび、スパッタリングターゲット材料等に使用されてい
る高純度の低酸素Ｔｉ−Ａｌ系合金の製造方法に関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a low-oxygen Ti-Al alloy, and more specifically, a high-purity low-oxygen Ti-Al alloy used as a lightweight heat-resistant material and a sputtering target material. The present invention relates to a method for manufacturing an alloy.
【０００２】[0002]
【従来技術】一般的に、航空機、自動車、化学プラン
ト、工具等の各産業の技術分野において、エンジン効率
の向上、耐用年数の延長さらにはコスト低減等の要求は
益々強くなってきており、これを実現するためには、強
度、弾性率、耐熱性、耐蝕性等の高性能および高機能で
ある材料が強く要望されている。2. Description of the Related Art Generally, in the technical fields of industries such as aircraft, automobiles, chemical plants, tools, etc., demands for improving engine efficiency, extending service life, and reducing costs are becoming stronger and stronger. In order to realize the above, there is a strong demand for a material having high performance and high functionality such as strength, elastic modulus, heat resistance, and corrosion resistance.
【０００３】この要望を満足する材料として、Ｎｉ−Ａ
ｌ系合金、Ｆｅ−Ａｌ系合金、Ｔｉ−Ａｌ系合金等の金
属間化合物が挙げられ、特に、Ｔｉ−Ａｌ系合金の金属
間化合物は軽量高弾性率、高耐熱性等の優れた特性を有
していることから、各産業において注目を集めている。As a material satisfying this demand, Ni-A
There are intermetallic compounds such as l-based alloys, Fe-Al-based alloys, Ti-Al-based alloys, etc. In particular, intermetallic compounds of Ti-Al-based alloys have excellent characteristics such as lightweight high elastic modulus and high heat resistance. Because it has, it is attracting attention in each industry.
【０００４】そして、このような優れた特性を有してい
るＴｉ−Ａｌ系合金を製造する場合、Ｔｉ−Ａｌ系合金
は、この合金を構成する含有成分が活性であることか
ら、不活性雰囲気下において、純Ｔｉ、純Ａｌおよび第
３元素等の含有成分を真空アーク溶解法、プラズマ溶解
法、電子ビーム溶解法、水冷分割銅坩堝を使用する誘導
溶解法等により行われているのが現状である。When producing a Ti-Al alloy having such excellent properties, the Ti-Al alloy has an inert atmosphere because the constituent components of the alloy are active. Under the current circumstances, pure Ti, pure Al and third elements are contained by a vacuum arc melting method, a plasma melting method, an electron beam melting method, an induction melting method using a water-cooled split copper crucible, etc. Is.
【０００５】そして、真空アーク溶解法によりＴｉ−Ａ
ｌ系合金を溶製する場合、粒状、或いは、塊状のＴｉと
Ａｌの原料を棒状に圧縮成形し、この成形体を消耗電極
として真空下においてアーク溶解を行うものであるが、
原料のＴｉとＡｌの融点が大きく相違しており、従っ
て、溶解速度が異なる結果、Ｔｉが未溶解のまま鋳塊中
に混入したり、或いは、溶解時の溶湯プール中の撹拌力
が不充分であるため、原料の純Ｔｉおよび純Ａｌが均一
に混合する時間的な余裕がなく、含有成分の偏析が起こ
り易くなり、均質な鋳塊を作ることが困難となる。ま
た、純度に関しても使用する原料の純度に依存している
ものであるから、高純度化を望むことには困難性を伴
う。Then, Ti-A is formed by the vacuum arc melting method.
In the case of melting an l-based alloy, granular or lumpy raw materials of Ti and Al are compression-molded into a rod shape, and this molded body is used as a consumable electrode to perform arc melting under vacuum.
The melting points of Ti and Al, which are the raw materials, are very different. Therefore, as a result of different melting rates, Ti may be mixed into the ingot as unmelted, or the stirring force in the molten metal pool during melting is insufficient. Therefore, there is no time margin for uniformly mixing the pure Ti and pure Al as the raw materials, segregation of the contained components easily occurs, and it becomes difficult to form a homogeneous ingot. Further, since the purity also depends on the purity of the raw material used, it is difficult to achieve high purity.
【０００６】プラズマアーク溶解法、電子ビーム溶解法
は、原料となる塊状、粒状の純Ｔｉ、純Ａｌをコールド
ハース内において溶解後、水冷鋳型内に注湯するか、コ
ールドハースを使用しないで直接に原料を鋳型内に装入
しながら溶解を行い、鋳塊を作製する方法が一般的であ
るが、この両溶解法は共に真空アーク溶解法と同様に、
溶湯プール内の撹拌力不足による偏析、融点の相違によ
る未溶解が起こり易く、均質な鋳塊を作製し難いという
問題がある。純度も真空アーク溶解法と同様に高純度化
を望むことには困難性がある。In the plasma arc melting method and the electron beam melting method, the bulk or granular pure Ti or pure Al as a raw material is melted in a cold hearth and then poured into a water-cooled mold or directly without using the cold hearth. Melting is performed while charging the raw materials into the mold, and a method for producing an ingot is common, but both melting methods are similar to the vacuum arc melting method.
There is a problem that segregation due to insufficient stirring force in the molten metal pool and unmelting due to difference in melting point easily occur, and it is difficult to produce a homogeneous ingot. As for the purity, it is difficult to obtain high purity as in the vacuum arc melting method.
【０００７】また、特公平０３−０４４１３３号公報に
おいて開示されている、水冷分割銅坩堝を使用する誘導
溶解法は、水冷坩堝からの冷却効果により形成された溶
融金属のスカル（凝固殻）上に溶融保持されること、さ
らに、誘導コイルからの電磁気力により溶融金属は放物
線形状に保持されることから、坩堝材との接触が少な
く、汚染の少ない溶解を行うことが可能であり、かつ、
溶湯プール内の撹拌力も大きいので成分偏析がなく、均
一な鋳塊が作製できるという有利性があるが、純度に関
しては精錬効果を有しておらず、溶解原料に依存してお
り、高純度化を望むことは困難である。Further, the induction melting method using a water-cooled split copper crucible disclosed in Japanese Patent Publication No. 03-044133 discloses a molten metal skull (solidified shell) formed by a cooling effect from the water-cooled crucible. It is melted and held, further, since the molten metal is held in a parabolic shape by the electromagnetic force from the induction coil, there is little contact with the crucible material, and it is possible to perform melting with less pollution, and
Since the stirring power in the molten metal pool is also large, there is the advantage that there is no segregation of the components and a uniform ingot can be produced, but there is no refining effect with regard to purity, and it depends on the molten raw material, and it is highly purified. Is difficult to hope for.
【０００８】また、含有成分均一化を可能とする誘導溶
解法に、ＣａＯ坩堝を使用する方法があるが、この方法
は坩堝材であるＣａＯからの酸素により溶湯の汚染を防
止することが極めて困難であり、通常は溶湯の酸素含有
量５００〜１０００ｐｐｍ、であり、Ｃａ脱酸等を行っ
ても溶湯酸素含有量は３００〜５００ｐｐｍ程度にしか
減少させることはできなかった。In addition, there is a method of using a CaO crucible as an induction melting method capable of making the contained components uniform, but this method is extremely difficult to prevent contamination of the molten metal by oxygen from CaO which is a crucible material. The oxygen content of the molten metal is usually 500 to 1000 ppm, and the oxygen content of the molten metal could only be reduced to about 300 to 500 ppm even if Ca deoxidation was performed.
【０００９】従って、上記に説明した優れた特性を有す
るＴｉ−Ａｌ系合金を製造する従来の溶解法において
は、精錬効果を期待することができず、従って、純度は
溶解原料に依存するものであり、酸素含有量も２００ｐ
ｐｍ以下とすることはできず、さらに、成分偏析のない
均一なＴｉ−Ａｌ系合金を製造することは困難であっ
た。Therefore, the refining effect cannot be expected in the conventional melting method for producing the Ti-Al alloy having the above-mentioned excellent characteristics, and therefore the purity depends on the melting raw material. Yes, oxygen content is 200p
It could not be pm or less, and it was difficult to manufacture a uniform Ti-Al alloy without segregation of components.
【００１０】[0010]
【発明が解決しようとする課題】本発明は上記に説明し
たように従来におけるＴｉ−Ａｌ系合金の製造方法の種
々の問題点に鑑み、本発明者が鋭意研究を行い、検討を
重ねた結果、難加工性を改善することができ、室温にお
ける延性を改善することができ、さらに、鋳塊中の含有
成分を均一化を行うことができ、従来より強い要望のあ
る２００ｐｐｍ以下の低酸素を充分に達成することがで
きる低酸素Ｔｉ−Ａｌ系合金の製造方法を開発したので
ある。SUMMARY OF THE INVENTION As described above, the present invention has been made by the inventors of the present invention as a result of extensive studies in view of various problems in the conventional method for producing a Ti--Al alloy. In addition, it is possible to improve the difficult workability, improve the ductility at room temperature, and further homogenize the components contained in the ingot. We have developed a method of producing a low oxygen Ti-Al alloy that can be sufficiently achieved.
【００１１】[0011]
【課題を解決するための手段】本発明に係る低酸素Ｔｉ
−Ａｌ系合金の製造方法は、Ａｌ２５〜５５ｗｔ％を含
有するＴｉ−Ａｌ系合金を最終目標のＡｌ含有量より
１.５ｗｔ％以上より多く含有する溶解母材或いは溶湯
に作製した後、この溶湯を１×１０-2Ｔｏｒｒより高い
真空雰囲気下において、耐火物を使用しない溶解方式に
より保持して、溶湯中のＡｌを強制的に除去して最終目
標組成のＴｉ−Ａｌ系合金とすることを特徴とする低酸
素Ｔｉ−Ａｌ系合金の製造方法を第１の発明とし、Ａｌ
２５〜５５ｗｔ％を含有するＴｉ−Ａｌ系合金を最終目
標のＡｌ含有量より１.５ｗｔ％以上より多く含有する
溶解母材或いは溶湯に作製した後、この溶湯を１×１０
-2Ｔｏｒｒより高い真空雰囲気下において、耐火物を使
用しない溶解方式により保持して、溶湯中のＡｌを強制
的に除去して最終目標組成、或いは、最終目標組成より
低いＡｌ含有量とした鋳塊を作製し、この鋳塊を水冷坩
堝を使用して誘導溶解法により１０Ｔｏｒｒ以上の圧力
の不活性ガス雰囲気下において再溶解を行い、均一化お
よび成分調整を行って最終目標組成のＴｉ−Ａｌ系合金
とすることを特徴とする低酸素Ｔｉ−Ａｌ系合金の製造
方法を第２の発明とする２つの発明よりなるものであ
る。Low oxygen Ti according to the present invention
A method of manufacturing an Al-based alloy is as follows. A Ti-Al-based alloy containing 25 to 55 wt% of Al is made into a molten base material or a molten metal containing more than 1.5 wt% of the final target Al content, and then the molten metal is prepared. In a vacuum atmosphere higher than 1 × 10 -2 Torr by a melting method that does not use refractory, Al in the molten metal is forcibly removed to obtain a Ti-Al based alloy having a final target composition. A method for producing a low-oxygen Ti-Al-based alloy, which is characterized by
After the Ti-Al alloy containing 25 to 55 wt% was made into the molten base material or the molten metal containing more than 1.5 wt% of the final target Al content, the molten metal was 1 x 10
-2 In a vacuum atmosphere higher than 2 Torr, hold by a melting method that does not use refractory, and forcibly remove Al in the molten metal to obtain a final target composition or an Al content lower than the final target composition. A lump was prepared, and this slab was remelted by an induction melting method using a water-cooled crucible under an inert gas atmosphere of a pressure of 10 Torr or more, and homogenization and component adjustment were performed to make Ti-Al of a final target composition. The present invention comprises two inventions, the second invention being a method for producing a low-oxygen Ti-Al alloy, which is characterized by using a system alloy.
【００１２】本発明に係る低酸素Ｔｉ−Ａｌ系合金の製
造方法について、以下詳細に説明する。The method for producing the low oxygen Ti-Al alloy according to the present invention will be described in detail below.
【００１３】本発明に係る低酸素Ｔｉ−Ａｌ系合金の製
造方法においては、先ず、Ａｌを２５〜５５ｗｔ％含有
するＴｉ−Ａｌ系合金を最終目標組成のＡｌ含有量より
も１.５ｗｔ％多い組成の溶解母材或いは溶湯を作製す
る。そして、最終目標組成より１.５ｗｔ％以上多く含
有する溶解母材或溶湯にする方法は、溶解原料の配合を
Ａｌを多くなるようにするのであり、１.５ｗｔ％以上
多く含有させるのは、Ａｌを蒸発除去することにより同
時に酸素が除去されるＡｌ蒸発脱酸作用を利用するの
で、予めＡｌを最終目標組成より多く含有させる必要が
あり、Ａｌ含有量が１.５ｗｔ％よりも多くなければ脱
酸効果がなく、最終目標組成より多くＡｌを含有してい
る溶解母材或いは溶湯を作製し、多く含有している分を
除去することにより、その量に見合った量の酸素も除去
することができる。従って、Ａｌ含有量の多い原料を耐
火物等を用いない溶解方法により溶湯を保持し、１×１
０-2Ｔｏｒｒよりも高い真空雰囲気下において強制的に
Ａｌを除去すると、これに伴って溶湯中の酸素量も減少
するのであり、最終目標組成のＡｌ含有量よりもＡｌを
多く含有する組成の溶湯から強制的にＡｌを除去するこ
とにより、最終目標組成のＴｉ−Ａｌ系合金を製造する
ことができると同時に酸素を２００ｐｐｍ以下に低減さ
せることができる。また、Ａｌを蒸発除去することによ
り脱酸を行うため、１×１０-2Ｔｏｒｒより高い真空雰
囲気下でないと、Ａｌの蒸発が起こりにくいからで、真
空度が高くなるほどＡｌの蒸発量は増加し、それにより
脱酸の効果も大きくなるのである。In the method for producing a low oxygen Ti-Al alloy according to the present invention, first, the Ti-Al alloy containing 25 to 55 wt% of Al is added by 1.5 wt% more than the Al content of the final target composition. A molten base material or molten metal having a composition is prepared. And the method of making the molten base material or molten metal containing more than 1.5 wt% than the final target composition is to increase the content of Al in the melting raw material. Since the Al evaporative deoxidizing action, which removes oxygen at the same time by removing Al by evaporation, is used, it is necessary to preliminarily contain more Al than the final target composition, and if the Al content is not more than 1.5 wt%. By producing a molten base material or a molten metal that does not have a deoxidizing effect and contains more Al than the final target composition, and remove the content that contains a large amount, the amount of oxygen corresponding to that amount can also be removed. You can Therefore, the molten metal is retained by a melting method without using a refractory or the like for a raw material having a high Al content, and 1 × 1
When Al is forcibly removed in a vacuum atmosphere higher than 0 -2 Torr, the amount of oxygen in the molten metal is also reduced, and the composition containing more Al than the final target composition Al content is reduced. By forcibly removing Al from the molten metal, it is possible to produce a Ti—Al-based alloy having a final target composition and at the same time reduce oxygen to 200 ppm or less. Further, since the deoxidation is performed by removing Al by evaporation, the evaporation of Al is less likely to occur unless the vacuum atmosphere is higher than 1 × 10 -2 Torr. Therefore, the higher the degree of vacuum, the more the amount of evaporation of Al increases. As a result, the effect of deoxidation is also increased.
【００１４】さらに、上記に説明した方法により、最終
目標組成、或いは、最終目標組成より低いＡｌ含有量お
よび酸素含有量を充分に低減した鋳塊を作製して、水冷
分割銅坩堝を使用する誘導溶解法により不活性ガス雰囲
気下（１０Ｔｏｒｒ以上の圧力）で再溶解を行って、均
一化および成分調整を行うことにより最終目標組成の鋳
塊を製造するものであり、即ち、Ａｌの強制除去溶解に
よる低酸素化と、水冷分割銅坩堝による無汚染均一化溶
解を同時に行うことができる溶解方法により、酸素濃度
が２００ｐｐｍ以下の低酸素Ｔｉ−Ａｌ系合金を製造で
きる。Further, by using the method described above, an ingot having a final target composition or an Al content and an oxygen content sufficiently lower than the final target composition is sufficiently prepared, and a water-cooled split copper crucible is used for induction. The ingot is manufactured by remelting in an inert gas atmosphere (pressure of 10 Torr or more) by a melting method to homogenize and adjust the components, that is, forcibly removing Al by melting A low-oxygen Ti-Al-based alloy having an oxygen concentration of 200 ppm or less can be produced by a melting method capable of simultaneously reducing oxygen by means of and the water-cooled split copper crucible to make uniform pollution-free melting.
【００１５】しかして、溶解母材或いは溶湯中のＡｌを
強制的に蒸発除去することにより、最終目標組成に対し
てＡｌ組成が大幅に異なった場合、Ａｌを添加する等の
手段により成分調整を行うのであるが、Ａｌが少なくな
り過ぎた場合はＡｌを添加し、また、Ａｌが多い場合は
Ｔｉを添加する。この場合、酸素はＡｌよりもＴｉに多
く含有されるので、Ｔｉを添加して成分調整を行うより
も、充分にＡｌを蒸発除去させて脱酸を行った後、Ａｌ
添加により成分調整を行った方が有利である。また、１
０Ｔｏｒｒ未満の圧力の不活性ガス雰囲気下で再溶解を
行うと、水冷分割銅坩堝の分割された銅と銅との間にア
ーキングと呼ばれるアーク放電が起こる可能性があり、
それにより銅坩堝の一部が溶損して冷却水が吹き出す
と、水蒸気爆発のおこる可能性があり、また、１×１０
-2Ｔｏｒｒ程度の真空雰囲気下になると、Ａｌが蒸発す
るので成分調整が困難となるからである。However, when the Al content in the molten base material or the molten metal is forcibly removed by evaporation, when the Al composition is significantly different from the final target composition, the composition is adjusted by adding Al or the like. As is done, Al is added when the amount of Al is too small, and Ti is added when the amount of Al is large. In this case, since oxygen is contained more in Ti than in Al, it is necessary to evaporate and remove Al sufficiently to perform deoxidation, rather than adjusting the composition by adding Ti.
It is advantageous to adjust the components by addition. Also, 1
When remelting is performed under an inert gas atmosphere having a pressure of less than 0 Torr, arc discharge called arcing may occur between the divided copper of the water-cooled split copper crucible and the copper,
As a result, if a part of the copper crucible is melted and cooling water is blown out, steam explosion may occur.
This is because under a vacuum atmosphere of about -2 Torr, Al evaporates, making it difficult to adjust the components.
【００１６】なお、本発明に低酸素Ｔｉ−Ａｌ系合金の
製造方法おいて使用できる合金としては、Ｔｉ−Ａｌ系
合金ばかりではなく、室温延性を向上させる効果を有す
るＣｒ、Ｍｎ、Ｖ、および、高温強度を向上させる効果
のあるＭｏ、Ｗ、Ｎｂ、Ｔａ、さらに、耐熱性を向上さ
せる効果を有するＹ等の成分を含有させることにより成
分調整を行うことができので、広くＴｉ−Ａｌ系合金に
適用が可能である。Not only Ti—Al based alloys but also Cr, Mn, V, and V, which have the effect of improving room temperature ductility, can be used in the method for producing a low oxygen Ti—Al based alloy of the present invention. Since the components can be adjusted by including Mo, W, Nb, Ta which has the effect of improving the high temperature strength and Y which has the effect of improving the heat resistance, the components can be adjusted widely. It can be applied to alloys.
【００１７】[0017]
【実 施 例】本発明に係る低酸素Ｔｉ−Ａｌ系合金の
製造方法の実施例を説明する。[Examples] Examples of the method for producing a low oxygen Ti-Al alloy according to the present invention will be described.
【００１８】[0018]
【実 施 例】表１に溶解原料、電子ビーム溶解法による
強制的にＡｌを除去した材料、さらに、この材料を水冷
分割銅坩堝を使用した誘導溶解方法による再溶解材料の
化学成分を示す。[Examples] Table 1 shows the chemical composition of the melting raw material, the material in which Al was forcibly removed by the electron beam melting method, and the remelting material of this material by the induction melting method using the water-cooled split copper crucible.
【００１９】電子ビーム溶解炉を使用して、先ず、原料
配合値を検討してから、原料を装入しながら、水冷ハー
ス内で１×１０-5Ｔｏｒｒ程度の真空雰囲気下でＴｉ−
４０ｗｔ％Ａｌの合金溶湯（溶解母材）を作製・保持
し、同時にＡｌを強制的に除去した。さらに、この材料
をアルゴンガス１００Ｔｏｒｒ雰囲気下で、水冷銅坩堝
により誘導溶解を行った。表１に製造された材料の含有
成分および成分割合を示す。この表１から明らかなよう
に、本発明に係る低酸素Ｔｉ−Ａｌ系合金の製造方法に
よれば、酸素濃度が２００ｐｐｍ以下の低酸素で、か
つ、偏析のない均一な鋳塊を製造することができた。First, using an electron beam melting furnace, the raw material blending values are examined, and then while the raw materials are being charged, Ti-in a water-cooled hearth under a vacuum atmosphere of about 1 × 10 -5 Torr.
A molten alloy (melt base material) of 40 wt% Al was prepared and held, and Al was forcibly removed at the same time. Further, this material was subjected to induction melting in a water-cooled copper crucible under an atmosphere of argon gas of 100 Torr. Table 1 shows the contained components and the component ratios of the manufactured materials. As is clear from Table 1, according to the method for producing a low-oxygen Ti-Al-based alloy according to the present invention, it is possible to produce a uniform ingot with a low oxygen concentration of 200 ppm or less and without segregation. I was able to.
【００２０】[0020]
【表１】 [Table 1]
【００２１】[0021]
【発明の効果】以上説明したように、本発明に係る低酸
素Ｔｉ−Ａｌ系合金の製造方法は上記の構成であるか
ら、Ａｌを強制的に除去することにより、同時に２００
ｐｐｍ以下の低酸素とすることができ、かつ、成分均一
の鋳塊を製造することができるという効果を有するもの
である。As described above, since the method for producing a low oxygen Ti-Al alloy according to the present invention has the above-mentioned structure, it is possible to remove Al by forcibly removing Al at the same time.
It has the effect that the oxygen content can be reduced to ppm or less and that the ingot can have a uniform composition.
─────────────────────────────────────────────────────
─────────────────────────────────────────────────── ───
【手続補正書】[Procedure amendment]
【提出日】平成４年７月１３日[Submission date] July 13, 1992
【手続補正１】[Procedure Amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】全文[Name of item to be corrected] Full text
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【書類名】 明細書[Document name] Statement
【発明の名称】 低酸素Ｔｉ−Ａｌ系合金の製造方法お
よび低酸素Ｔｉ−Ａｌ系合金Title: Method for producing low oxygen Ti-Al alloy and low oxygen Ti-Al alloy
【特許請求の範囲】[Claims]
【発明の詳細な説明】Detailed Description of the Invention
【０００１】[0001]
【産業上の利用分野】本発明は低酸素Ｔｉ−Ａｌ系合金
の製造方法および低酸素Ｔｉ−Ａｌ系合金に関し、さら
に詳しくは、軽量耐熱材料、および、スパッタリングタ
ーゲット材料等に使用されている高純度の低酸素Ｔｉ−
Ａｌ系合金の製造方法および低酸素Ｔｉ−Ａｌ系合金に
関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a low oxygen Ti-Al alloy and a low oxygen Ti-Al alloy. More specifically, it is a high heat resistance material used for a lightweight heat resistant material and a sputtering target material. Purity of low oxygen Ti-
The present invention relates to a method for producing an Al-based alloy and a low oxygen Ti-Al-based alloy.
【０００２】[0002]
【従来技術】一般的に、航空機、自動車、化学プラン
ト、工具等の各産業の技術分野において、エンジン効率
の向上、耐用年数の延長さらにはコスト低減等の要求は
益々強くなってきており、これを実現するためには、強
度、弾性率、耐熱性、耐蝕性等の高性能および高機能で
ある材料が強く要望されている。2. Description of the Related Art Generally, in the technical fields of industries such as aircraft, automobiles, chemical plants, tools, etc., demands for improving engine efficiency, extending service life, and reducing costs are becoming stronger and stronger. In order to realize the above, there is a strong demand for a material having high performance and high functionality such as strength, elastic modulus, heat resistance, and corrosion resistance.
【０００３】この要望を満足する材料として、Ｎｉ−Ａ
ｌ系合金、Ｆｅ−Ａｌ系合金、Ｔｉ−Ａｌ系合金等の金
属間化合物が挙げられ、特に、Ｔｉ−Ａｌ系合金の金属
間化合物は軽量高弾性率、高耐熱性等の優れた特性を有
していることから、各産業において注目を集めている。As a material satisfying this demand, Ni-A
There are intermetallic compounds such as l-based alloys, Fe-Al-based alloys, Ti-Al-based alloys, etc. In particular, intermetallic compounds of Ti-Al-based alloys have excellent characteristics such as lightweight high elastic modulus and high heat resistance. Because it has, it is attracting attention in each industry.
【０００４】そして、このような優れた特性を有してい
るＴｉ−Ａｌ系合金を製造する場合、Ｔｉ−Ａｌ系合金
は、この合金を構成する含有成分が活性であることか
ら、不活性雰囲気下において、純Ｔｉ、純Ａｌおよび第
３元素等の含有成分を真空アーク溶解法、プラズマ溶解
法、電子ビーム溶解法、水冷分割銅坩堝を使用する誘導
溶解法等により行われているのが現状である。When producing a Ti-Al alloy having such excellent properties, the Ti-Al alloy has an inert atmosphere because the constituent components of the alloy are active. Under the current circumstances, pure Ti, pure Al and third elements are contained by a vacuum arc melting method, a plasma melting method, an electron beam melting method, an induction melting method using a water-cooled split copper crucible, etc. Is.
【０００５】そして、真空アーク溶解法によりＴｉ−Ａ
ｌ系合金を溶製する場合、粒状、或いは、塊状のＴｉと
Ａｌの原料を棒状に圧縮成形し、この成形体を消耗電極
として真空下においてアーク溶解を行うものであるが、
原料のＴｉとＡｌの融点が大きく相違しており、従っ
て、溶解速度が異なる結果、Ｔｉが未溶解のまま鋳塊中
に混入したり、或いは、溶解時の溶湯プール中の撹拌力
が不充分であるため、原料の純Ｔｉおよび純Ａｌが均一
に混合する時間的な余裕がなく、含有成分の偏析が起こ
り易くなり、均質な鋳塊を作ることが困難となる。ま
た、純度に関しても使用する原料の純度に依存している
ものであるから、高純度化を望むことには困難性を伴
う。Then, Ti-A is formed by the vacuum arc melting method.
In the case of melting an l-based alloy, granular or lumpy raw materials of Ti and Al are compression-molded into a rod shape, and this molded body is used as a consumable electrode to perform arc melting under vacuum.
The melting points of Ti and Al, which are the raw materials, are very different. Therefore, as a result of different melting rates, Ti may be mixed into the ingot as unmelted, or the stirring force in the molten metal pool during melting is insufficient. Therefore, there is no time margin for uniformly mixing the pure Ti and pure Al as the raw materials, segregation of the contained components easily occurs, and it becomes difficult to form a homogeneous ingot. Further, since the purity also depends on the purity of the raw material used, it is difficult to achieve high purity.
【０００６】プラズマアーク溶解法、電子ビーム溶解法
は、原料となる塊状、粒状の純Ｔｉ、純Ａｌをコールド
ハース内において溶解後、水冷鋳型内に注湯するか、コ
ールドハースを使用しないで直接に原料を鋳型内に装入
しながら溶解を行い、鋳塊を作製する方法が一般的であ
るが、この両溶解法は共に真空アーク溶解法と同様に、
溶湯プール内の撹拌力不足による偏析、融点の相違によ
る未溶解が起こり易く、均質な鋳塊を作製し難いという
問題がある。純度も真空アーク溶解法と同様に高純度化
を望むことには困難性がある。In the plasma arc melting method and the electron beam melting method, the bulk or granular pure Ti or pure Al as a raw material is melted in a cold hearth and then poured into a water-cooled mold or directly without using the cold hearth. Melting is performed while charging the raw materials into the mold, and a method for producing an ingot is common, but both melting methods are similar to the vacuum arc melting method.
There is a problem that segregation due to insufficient stirring force in the molten metal pool and unmelting due to difference in melting point easily occur, and it is difficult to produce a homogeneous ingot. As for the purity, it is difficult to obtain high purity as in the vacuum arc melting method.
【０００７】また、特公平０３−０４４１３３号公報に
おいて開示されている、水冷分割銅坩堝を使用する誘導
溶解法は、水冷坩堝からの冷却効果により形成された溶
融金属のスカル（凝固殻）上に溶融保持されること、さ
らに、誘導コイルからの電磁気力により溶融金属は放物
線形状に保持されることから、坩堝材との接触が少な
く、汚染の少ない溶解を行うことが可能であり、かつ、
溶湯プール内の撹拌力も大きいので成分偏析がなく、均
一な鋳塊が作製できるという有利性があるが、純度に関
しては精錬効果を有しておらず、溶解原料に依存してお
り、高純度化を望むことは困難である。Further, the induction melting method using a water-cooled split copper crucible disclosed in Japanese Patent Publication No. 03-044133 discloses a molten metal skull (solidified shell) formed by a cooling effect from the water-cooled crucible. It is melted and held, further, since the molten metal is held in a parabolic shape by the electromagnetic force from the induction coil, there is little contact with the crucible material, and it is possible to perform melting with less pollution, and
Since the stirring power in the molten metal pool is also large, there is the advantage that there is no segregation of the components and a uniform ingot can be produced, but there is no refining effect with regard to purity, and it depends on the molten raw material, and it is highly purified. Is difficult to hope for.
【０００８】また、含有成分均一化を可能とする誘導溶
解法に、ＣａＯ坩堝を使用する方法があるが、この方法
は坩堝材であるＣａＯからの酸素により溶湯の汚染を防
止することが極めて困難であり、通常は溶湯の酸素含有
量５００〜１０００ｐｐｍ、であり、Ｃａ脱酸等を行っ
ても溶湯酸素含有量は３００〜５００ｐｐｍ程度にしか
減少させることはできなかった。In addition, there is a method of using a CaO crucible as an induction melting method capable of making the contained components uniform, but this method is extremely difficult to prevent contamination of the molten metal by oxygen from CaO which is a crucible material. The oxygen content of the molten metal is usually 500 to 1000 ppm, and the oxygen content of the molten metal could only be reduced to about 300 to 500 ppm even if Ca deoxidation was performed.
【０００９】従って、上記に説明した優れた特性を有す
るＴｉ−Ａｌ系合金を製造する従来の溶解法において
は、精錬効果を期待することができず、従って、純度は
溶解原料に依存するものであり、酸素含有量も２００ｐ
ｐｍ以下とすることはできず、さらに、成分偏析のない
均一なＴｉ−Ａｌ系合金を製造することは困難であっ
た。Therefore, the refining effect cannot be expected in the conventional melting method for producing the Ti-Al alloy having the above-mentioned excellent characteristics, and therefore the purity depends on the melting raw material. Yes, oxygen content is 200p
It could not be pm or less, and it was difficult to manufacture a uniform Ti-Al alloy without segregation of components.
【００１０】[0010]
【発明が解決しようとする課題】本発明は上記に説明し
たように従来におけるＴｉ−Ａｌ系合金の製造方法およ
びＴｉ−Ａｌ系合金の種々の問題点に鑑み、本発明者が
鋭意研究を行い、検討を重ねた結果、難加工性を改善す
ることができ、室温における延性を改善することがで
き、さらに、鋳塊中の含有成分を均一化を行うことがで
き、従来より強い要望のある極めて低い酸素含有量を充
分に達成することができる低酸素Ｔｉ−Ａｌ系合金の製
造方法および低酸素Ｔｉ−Ａｌ系合金を開発したのであ
る。As described above, the present invention has been conducted by the present inventors in view of the conventional method for producing a Ti-Al alloy and various problems of the Ti-Al alloy. As a result of repeated studies, it is possible to improve the difficult workability, improve the ductility at room temperature, and further homogenize the components contained in the ingot, and there is a strong demand than before. The inventors have developed a method for producing a low-oxygen Ti-Al-based alloy and a low-oxygen Ti-Al-based alloy capable of sufficiently achieving an extremely low oxygen content.
【００１１】[0011]
【課題を解決するための手段】本発明に係る低酸素Ｔｉ
−Ａｌ系合金の製造方法および低Ｔｉ−Ａｌ系合金は、
Ａｌ２５〜５５ｗｔ％を含有するＴｉ−Ａｌ系合金を最
終目標のＡｌ含有量より１．５ｗｔ％以上より多く含有
する溶解母材或いは溶湯に作製した後、この溶湯を１×
１０−２Ｔｏｒｒより高い真空雰囲気下において、耐火
物を使用しない溶解方式により保持して、溶湯中のＡｌ
を強制的に除去して最終目標組成のＴｉ−Ａｌ系合金と
することを特徴とする低酸素Ｔｉ−Ａｌ系合金の製造方
法を第１の発明とし、Ａｌ２５〜５５ｗｔ％を含有する
Ｔｉ−Ａｌ系合金を最終目標のＡｌ含有量より１．５ｗ
ｔ％以上より多く含有する溶解母材或いは溶湯に作製し
た後、この溶湯を１×１０−２Ｔｏｒｒより高い真空雰
囲気下において、耐火物を使用しない溶解方式により保
持して、溶湯中のＡｌを強制的に除去して最終目標組
成、或いは、最終目標組成より低いＡｌ含有量とした鋳
塊を作製し、この鋳塊を水冷坩堝を使用して誘導溶解法
により１０Ｔｏｒｒ以上の圧力の不活性ガス雰囲気下に
おいて再溶解を行い、均一化および成分調整を行って最
終目標組成のＴｉ−Ａｌ系合金とすることを特徴とする
低酸素Ｔｉ−Ａｌ系合金の製造方法を第２の発明とし、
さらに、酸素含有量が２００ｐｐｍ以下である低酸素
Ｔｉ−Ａｌ系合金を第３の発明とする３つの発明よりな
るものである。Low oxygen Ti according to the present invention
-Al-based alloy manufacturing method and low Ti-Al-based alloy,
A Ti-Al based alloy containing 25 to 55 wt% Al was made into a molten base material or a molten metal containing more than 1.5 wt% of the final target Al content, and then this molten metal was 1 ×
In a vacuum atmosphere higher than 10 −2 Torr, the molten Al is held by a melting method that does not use refractory.
Is forcibly removed to obtain a Ti-Al-based alloy having a final target composition. A method for producing a low-oxygen Ti-Al-based alloy is defined as a first invention, and Ti-Al containing 25 to 55 wt% of Al is used. System alloy is 1.5w from the final target Al content
After producing a molten base material or a molten metal containing more than t%, the molten metal is held in a vacuum atmosphere higher than 1 × 10 −2 Torr by a melting method without using a refractory material to remove Al in the molten metal. It is forcibly removed to produce a final target composition or an ingot having an Al content lower than the final target composition, and this ingot is subjected to an induction melting method using a water-cooled crucible by an inactive gas having a pressure of 10 Torr or more. The second invention is a method for producing a low-oxygen Ti-Al alloy, which is characterized by performing re-melting in an atmosphere, homogenizing and adjusting components to obtain a Ti-Al alloy having a final target composition,
Furthermore, the present invention comprises three inventions, which is a low-oxygen Ti-Al-based alloy having an oxygen content of 200 ppm or less as a third invention.
【００１２】本発明に係る低酸素Ｔｉ−Ａｌ系合金の製
造方法および低酸素Ｔｉ−Ａｌ系合金について、以下詳
細に説明する。The method for producing a low oxygen Ti-Al alloy and the low oxygen Ti-Al alloy according to the present invention will be described in detail below.
【００１３】本発明に係る低酸素Ｔｉ−Ａｌ系合金の製
造方法においては、先ず、Ａｌを２５〜５５ｗｔ％含有
するＴｉ−Ａｌ系合金を最終目標組成のＡｌ含有量より
も１．５ｗｔ％多い組成の溶解母材或いは溶湯を作製す
る。そして、最終目標組成より１．５ｗｔ％以上多く含
有する溶解母材或溶湯にする方法は、溶解原料の配合を
Ａｌを多くなるようにするのであり、１．５ｗｔ％以上
多く含有させるのは、Ａｌを蒸発除去することにより同
時に酸素が除去されるＡｌ蒸発脱酸作用を利用するの
で、予めＡｌを最終目標組成より多く含有させる必要が
あり、Ａｌ含有量が１．５ｗｔ％よりも多くなければ脱
酸効果がなく、最終目標組成より多くＡｌを含有してい
る溶解母材或いは溶湯を作製し、多く含有している分を
除去することにより、その量に見合った量の酸素も除去
することができる。In the method for producing a low oxygen Ti-Al alloy according to the present invention, first, a Ti-Al alloy containing 25 to 55 wt% of Al is added by 1.5 wt% more than the Al content of the final target composition. A molten base material or molten metal having a composition is prepared. And, the method of making the molten base material or the molten metal containing more than 1.5 wt% than the final target composition is to increase the content of Al in the melting raw material. Since the Al evaporative deoxidizing action by which oxygen is removed at the same time by removing Al by evaporation is utilized, it is necessary to preliminarily contain more Al than the final target composition, and if the Al content is not more than 1.5 wt%. By producing a molten base material or a molten metal that does not have a deoxidizing effect and contains more Al than the final target composition, and remove the content that contains a large amount, the amount of oxygen corresponding to that amount can also be removed. You can
【００１４】従って、Ａｌ含有量の多い原料を耐火物等
を用いない溶解方法により溶湯を保持し、１×１０−２
Ｔｏｒｒよりも高い真空雰囲気下において強制的にＡｌ
を除去すると、これに伴って溶湯中の酸素量も減少する
のであり、最終目標組成のＡｌ含有量よりもＡｌを多く
含有する組成の溶湯から強制的にＡｌを除去することに
より、最終目標組成のＴｉ−Ａｌ系合金を製造すること
ができると同時に酸素を２００ｐｐｍ以下に低減させる
ことができる。また、Ａｌを蒸発除去することにより脱
酸を行うため、１×１０−２Ｔｏｒｒより高い真空雰囲
気下でないと、Ａｌの蒸発が起こりにくいからで、真空
度が高くなるほどＡｌの蒸発量は増加し、それにより脱
酸の効果も大きくなるのである。Therefore, the molten metal is retained by a melting method without using a refractory or the like for a raw material having a high Al content, and 1 × 10 −2
Forced Al in a vacuum atmosphere higher than Torr
Therefore, the amount of oxygen in the molten metal is reduced accordingly. Therefore, by forcibly removing Al from the molten metal having a composition containing more Al than the final target composition, the final target composition is It is possible to produce the Ti-Al based alloy and the oxygen content can be reduced to 200 ppm or less. Further, since deoxidation is performed by removing Al by evaporation, evaporation of Al is less likely to occur unless in a vacuum atmosphere higher than 1 × 10 −2 Torr. Therefore, the higher the degree of vacuum, the more the amount of evaporation of Al increases. As a result, the effect of deoxidation is also increased.
【００１５】さらに、上記に説明した方法により、最終
目標組成、或いは、最終目標組成より低いＡｌ含有量お
よび酸素含有量を充分に低減した鋳塊を作製して、水冷
分割銅坩堝を使用する誘導溶解法により不活性ガス雰囲
気下（１０Ｔｏｒｒ以上の圧力）で再溶解を行って、均
一化および成分調整を行うことにより最終目標組成の鋳
塊を製造するものであり、即ち、Ａ１の強制除去溶解に
よる低酸素化と、水冷分割銅坩堝による無汚染均一化溶
解を同時に行うことができる溶解方法により、酸素濃度
が２００ｐｐｍ以下の低酸素Ｔｉ−Ａｌ系合金を製造で
きる。Further, by the method described above, an ingot using a water-cooled split copper crucible is prepared by producing an ingot having a final target composition or an Al content and an oxygen content sufficiently lower than the final target composition. The ingot is manufactured by remelting in an inert gas atmosphere (pressure of 10 Torr or more) by a melting method to homogenize and adjust components, that is, forcibly removing and melting A1. A low-oxygen Ti-Al-based alloy having an oxygen concentration of 200 ppm or less can be produced by a melting method capable of simultaneously reducing oxygen by means of and the water-cooled split copper crucible to make uniform pollution-free melting.
【００１６】しかして、溶解母材或いは溶湯中のＡｌを
強制的に蒸発除去することにより、最終目標組成に対し
てＡｌ組成が大幅に異なった場合、Ａｌを添加する等の
手段により成分調整を行うのであるが、Ａｌが少なくな
り過ぎた場合はＡｌを添加し、また、Ａｌが多い場合は
Ｔｉを添加する。この場合、酸素はＡｌよりもＴｉに多
く含有されるので、Ｔｉを添加して成分調整を行うより
も、充分にＡｌを蒸発除去させて脱酸を行った後、Ａｌ
添加により成分調整を行った方が有利である。また、１
０Ｔｏｒｒ未満の圧力の不活性ガス雰囲気下で再溶解を
行うと、水冷分割銅坩堝の分割された銅と銅との間にア
ーキングと呼ばれるアーク放電が起こる可能性があり、
それにより銅坩堝の一部が溶損して冷却水が吹き出す
と、水蒸気爆発のおこる可能性があり、また、１×１０
−２Ｔｏｒｒ程度の真空雰囲気下になると、Ａｌが蒸発
するので成分調整が困難となるからである。However, if the Al composition in the molten base material or the molten metal is forcibly removed by evaporation, when the Al composition greatly differs from the final target composition, the composition is adjusted by adding Al or the like. As is done, Al is added when the amount of Al is too small, and Ti is added when the amount of Al is large. In this case, since oxygen is contained more in Ti than in Al, it is necessary to evaporate and remove Al sufficiently to perform deoxidation, rather than adjusting the composition by adding Ti.
It is advantageous to adjust the components by addition. Also, 1
When remelting is performed under an inert gas atmosphere having a pressure of less than 0 Torr, arc discharge called arcing may occur between the divided copper of the water-cooled split copper crucible and the copper,
As a result, if a part of the copper crucible is melted and cooling water is blown out, steam explosion may occur.
This is because, in a vacuum atmosphere of about −2 Torr, Al evaporates, which makes it difficult to adjust the components.
【００１７】なお、本発明に低酸素Ｔｉ−Ａｌ系合金の
製造方法おいて使用できる合金としては、Ｔｉ−Ａｌ系
合金ばかりではなく、室温延性を向上させる効果を有す
るＣｒ、Ｍｎ、Ｖ、および、高温強度を向上させる効果
のあるＭｏ、Ｗ、Ｎｂ、Ｔａ、さらに、耐熱性を向上さ
せる効果を有するＹ等の成分を含有させることにより成
分調整を行うことができので、広くＴｉ−Ａｌ系合金に
適用が可能である。Not only Ti—Al alloys but also Cr, Mn, V, and V, which have the effect of improving room temperature ductility, can be used in the method of producing a low oxygen Ti—Al alloy according to the present invention. Since the components can be adjusted by including Mo, W, Nb, Ta which has the effect of improving the high temperature strength and Y which has the effect of improving the heat resistance, the components can be adjusted widely. It can be applied to alloys.
【００１８】[0018]
【実 施 例】本発明に係る低酸素Ｔｉ−Ａｌ系合金の
製造方法および低酸素Ｔｉ−Ａｌ系合金の実施例を説明
する。[Examples] A method for producing a low oxygen Ti-Al alloy and an example of the low oxygen Ti-Al alloy according to the present invention will be described.
【００１９】[0019]
【実 施 例】表１に溶解原料、電子ビーム溶解法によ
る強制的にＡｌを除去した材料、さらに、この材料を水
冷分割銅坩堝を使用した誘導溶解方法による再溶解材料
の化学成分を示す。[Examples] Table 1 shows the chemical composition of the melting raw material, the material in which Al was forcibly removed by the electron beam melting method, and the remelting material of this material by the induction melting method using the water-cooled split copper crucible.
【００２０】電子ビーム溶解炉を使用して、先ず、原料
配合値を検討してから、原料を装入しながら、水冷ハー
ス内で１×１０−５Ｔｏｒｒ程度の真空雰囲気下でＴｉ
−４０ｗｔ％Ａｌの合金溶湯（溶解母材）を作製・保持
し、同時にＡｌを強制的に除去した。さらに、この材料
をアルゴンガス１００Ｔｏｒｒ雰囲気下で、水冷銅坩堝
により誘導溶解を行った。表１に製造された材料の含有
成分および成分割合を示す。この表１から明らかなよう
に、本発明に係る低酸素Ｔｉ−Ａｌ系合金の製造方法に
よれば、酸素濃度が２００ｐｐｍ以下の低酸素で、か
つ、偏析のない均一な鋳塊を製造することができた。First, using an electron beam melting furnace, the raw material blending values were examined, and then while the raw materials were being charged, Ti was placed in a water-cooled hearth under a vacuum atmosphere of about 1 × 10 −5 Torr.
A molten alloy (melt base material) of -40 wt% Al was prepared and held, and Al was forcibly removed at the same time. Further, this material was subjected to induction melting in a water-cooled copper crucible under an atmosphere of argon gas of 100 Torr. Table 1 shows the contained components and the component ratios of the manufactured materials. As is clear from Table 1, according to the method for producing a low-oxygen Ti-Al-based alloy according to the present invention, it is possible to produce a uniform ingot with a low oxygen concentration of 200 ppm or less and without segregation. I was able to.
【００２１】[0021]
【表１】 [Table 1]
【００２２】[0022]
【発明の効果】以上説明したように、本発明に係る低酸
素Ｔｉ−Ａｌ系合金の製造方法および低酸素Ｔｉ−Ａｌ
系合金は上記の構成であるから、Ａｌを強制的に除去す
ることにより、同時に２００ｐｐｍ以下の低酸素とする
ことができ、かつ、成分均一の鋳塊を製造することがで
きるという優れた効果を有するものである。As described above, the method for producing a low oxygen Ti-Al alloy and the low oxygen Ti-Al according to the present invention.
Since the system-based alloy has the above-mentioned constitution, by forcibly removing Al, it is possible to simultaneously obtain low oxygen of 200 ppm or less, and it is possible to produce an ingot having a uniform composition. I have.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 尾 上 俊 雄 兵庫県神戸市須磨区神の谷５−10−77 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshio Onoue 5-10-77 Kamiya, Suma-ku, Kobe City, Hyogo Prefecture
Claims (2)
−Ａｌ系合金を、最終目標のＡｌ含有量より１.５ｗｔ
％以上より多く含有する溶解母材或いは溶湯に作製した
後、この溶湯を１×１０-2Ｔｏｒｒより高い真空雰囲気
下において、耐火物を使用しない溶解方式により溶解保
持して、溶湯中のＡｌを強制的に除去して最終目標組成
のＴｉ−Ａｌ系合金とすることを特徴とする低酸素Ｔｉ
−Ａｌ系合金の製造方法。1. Ti containing 25 to 55 wt% of Al
-Al-based alloy with a final target Al content of 1.5 wt
% Or more of the molten base material or the molten metal, the molten metal is melt-held in a vacuum atmosphere higher than 1 × 10 -2 Torr by a melting method that does not use refractory, and Al in the molten metal is retained. Low-oxygen Ti characterized by being forcibly removed to obtain a Ti-Al-based alloy having a final target composition
-The manufacturing method of Al type alloy.
−Ａｌ系合金を、最終目標のＡｌ含有量より１.５ｗｔ
％以上より多く含有する溶解母材或いは溶湯に作製した
後、この溶湯を１×１０-2Ｔｏｒｒより高い真空雰囲気
下において、耐火物を使用しない溶解方式により溶解保
持して、溶湯中のＡｌを強制的に除去して最終目標組
成、或いは、最終目標組成より低いＡｌ含有量とした鋳
塊を作製し、この鋳塊を水冷坩堝を使用して誘導溶解法
により１０Ｔｏｒｒ以上の圧力の不活性ガス雰囲気下に
おいて再溶解を行い、均一化および成分調整を行って最
終目標組成のＴｉ−Ａｌ系合金とすることを特徴とする
低酸素Ｔｉ−Ａｌ系合金の製造方法。2. Ti containing 25-55 wt% of Al
-Al-based alloy with a final target Al content of 1.5 wt
% Or more of the molten base material or the molten metal, the molten metal is melt-held in a vacuum atmosphere higher than 1 × 10 -2 Torr by a melting method that does not use refractory, and Al in the molten metal is retained. It is forcibly removed to produce a final target composition or an ingot having an Al content lower than the final target composition, and this ingot is subjected to an induction melting method using a water-cooled crucible by an inactive gas having a pressure of 10 Torr or more. A method for producing a low-oxygen Ti-Al-based alloy, characterized by performing re-melting in an atmosphere, homogenizing and adjusting components to obtain a Ti-Al-based alloy having a final target composition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3244861A JP2989053B2 (en) | 1991-08-30 | 1991-08-30 | Method for producing low oxygen Ti-Al alloy and low oxygen Ti-Al alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3244861A JP2989053B2 (en) | 1991-08-30 | 1991-08-30 | Method for producing low oxygen Ti-Al alloy and low oxygen Ti-Al alloy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0559466A true JPH0559466A (en) | 1993-03-09 |
| JP2989053B2 JP2989053B2 (en) | 1999-12-13 |
Family
ID=17125085
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3244861A Expired - Lifetime JP2989053B2 (en) | 1991-08-30 | 1991-08-30 | Method for producing low oxygen Ti-Al alloy and low oxygen Ti-Al alloy |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2989053B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009113060A (en) * | 2007-11-02 | 2009-05-28 | Kobe Steel Ltd | METHOD FOR PRODUCING INGOT OF TiAl-BASED ALLOY |
| WO2016035824A1 (en) * | 2014-09-04 | 2016-03-10 | 株式会社神戸製鋼所 | METHOD FOR DEOXIDIZING Ti-Al ALLOY |
| JP2016135907A (en) * | 2014-09-04 | 2016-07-28 | 株式会社神戸製鋼所 | DEOXIDATION METHOD OF Ti-Al-BASED ALLOY |
| CN107148484A (en) * | 2014-11-04 | 2017-09-08 | 株式会社神户制钢所 | The method of deoxidation of Al-Nb-Ti systems alloy |
| US11319614B2 (en) | 2014-11-04 | 2022-05-03 | Kobe Steel, Ltd. | Method for deoxidizing Al—Nb—Ti alloy |
-
1991
- 1991-08-30 JP JP3244861A patent/JP2989053B2/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009113060A (en) * | 2007-11-02 | 2009-05-28 | Kobe Steel Ltd | METHOD FOR PRODUCING INGOT OF TiAl-BASED ALLOY |
| WO2016035824A1 (en) * | 2014-09-04 | 2016-03-10 | 株式会社神戸製鋼所 | METHOD FOR DEOXIDIZING Ti-Al ALLOY |
| JP2016135907A (en) * | 2014-09-04 | 2016-07-28 | 株式会社神戸製鋼所 | DEOXIDATION METHOD OF Ti-Al-BASED ALLOY |
| CN106661670A (en) * | 2014-09-04 | 2017-05-10 | 株式会社神户制钢所 | Method for deoxidizing ti-al alloy |
| US20170283906A1 (en) * | 2014-09-04 | 2017-10-05 | Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | METHOD FOR DEOXIDIZING Ti-Al ALLOY |
| RU2673589C2 (en) * | 2014-09-04 | 2018-11-28 | Кабусики Кайся Кобе Сейко Се (Кобе Стил, Лтд.) | Ti-Al ALLOY DEOXIDATION METHOD |
| CN107148484A (en) * | 2014-11-04 | 2017-09-08 | 株式会社神户制钢所 | The method of deoxidation of Al-Nb-Ti systems alloy |
| US11319614B2 (en) | 2014-11-04 | 2022-05-03 | Kobe Steel, Ltd. | Method for deoxidizing Al—Nb—Ti alloy |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2989053B2 (en) | 1999-12-13 |
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