JPH05279773A - High strength titanium alloy having fine and uniform structure - Google Patents
High strength titanium alloy having fine and uniform structureInfo
- Publication number
- JPH05279773A JPH05279773A JP4052956A JP5295692A JPH05279773A JP H05279773 A JPH05279773 A JP H05279773A JP 4052956 A JP4052956 A JP 4052956A JP 5295692 A JP5295692 A JP 5295692A JP H05279773 A JPH05279773 A JP H05279773A
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- JP
- Japan
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- weight
- added
- titanium alloy
- type
- strength
- 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.)
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はα型、α＋β型およびβ
型チタン合金において、常温および高温における強度を
向上させた均一微細組織のチタン合金に関するものであ
る。The present invention relates to α type, α + β type and β type
TECHNICAL FIELD The present invention relates to a titanium alloy having a uniform fine structure, which has improved strength at room temperature and high temperature.
【０００２】[0002]
【従来の技術】チタン合金は比強度が高く耐食性に優
れ、かつ耐熱性も備えていることから、航空機用部材を
はじめ多くの構造材料分野で使用されており、近時その
用途は拡大しつつある。このように注目されているチタ
ン合金には、その金属組織が六方晶のα相からなるα
型、α相と体心立方晶のβ相からなるα＋β型、および
β相からなるβ型の３種類がある。2. Description of the Related Art Titanium alloys are used in many structural material fields including aircraft parts because of their high specific strength, excellent corrosion resistance, and heat resistance. is there. In such a titanium alloy, which has been receiving attention in this way, its metallographic structure is composed of a hexagonal α phase α
Type, α + β type composed of α phase and body-centered cubic β phase, and β type composed of β phase.
【０００３】α型合金にはＴｉ−５Ａｌ−２．５Ｓｎ、
Ｔｉ−５．５Ａｌなどがある。これらの合金は純チタン
にくらべて強度が高くβ変態点以下では常に安定である
ため、高温における熱安定性および耐クリープ性に優れ
ており、航空機のエンジンケースなどに使用される。α
＋β型合金にはＴｉ−６Ａｌ−４Ｖ、Ｔｉ−３Ａｌ−
２．５Ｖ、Ｔｉ−６Ａｌ−２Ｓｎ−４Ｚｒ−２Ｍｏおよ
びＴｉ−６Ａｌ−２Ｓｎ−４Ｚｒ−６Ｍｏ合金などがあ
る。これらは二相合金であるため加工性および溶接性な
どの部材製造性と、強度および耐疲労性などの製品特性
の両面で優れた特性を有するバランスのとれた材料であ
り、各種構造部材に使用される。β型合金にはＴｉ−１
５Ｖ−３Ｃｒ−３Ｓｎ−３Ａｌ、Ｔｉ−３Ａｌ−８Ｖ−
６Ｃｒ−４Ｍｏ−４Ｚｒなどがある。これらは常温まで
β相を残留させることができるので冷間加工性に優れ、
また熱処理により高強度が得られるため、近年盛んに開
発され各種分野で使用されるようになってきた。For the α type alloy, Ti-5Al-2.5Sn,
Ti-5.5Al and the like. These alloys have higher strength than pure titanium and are always stable below the β transformation point, so they have excellent thermal stability and creep resistance at high temperatures, and are used in aircraft engine cases and the like. α
+6 type alloy has Ti-6Al-4V, Ti-3Al-
2.5V, Ti-6Al-2Sn-4Zr-2Mo and Ti-6Al-2Sn-4Zr-6Mo alloys. Since these are two-phase alloys, they are well-balanced materials that have excellent characteristics in terms of both workability and weldability, and other product characteristics such as strength and fatigue resistance. To be done. Ti-1 for β-type alloy
5V-3Cr-3Sn-3Al, Ti-3Al-8V-
6Cr-4Mo-4Zr and the like. These have excellent cold workability because the β phase can remain at room temperature.
Further, since high strength can be obtained by heat treatment, it has been actively developed in recent years and has come to be used in various fields.
【０００４】上記した各チタン合金はさらなる高強度
化、また耐熱用途においては高温環境における耐熱強
度、さらに疲労強度の向上などから金属組織が均一微細
であることが要求される。近時、用途の拡大に伴って、
従来の使用環境よりも拡大された常温から高温にいたる
まで高強度を有する材料が望まれるようになってきた。
チタン合金はその用途に応じて鋳造ままの状態で使用さ
れる場合、または鋳造後に板、線、管、形材など各種形
状に成形加工して供給される場合などがある。しかし、
鋳造まま材では、粗大な鋳造組織のため強度、延性等が
乏しいという問題があり、また微細組織を得るためにβ
変態点（例えば、Ｔｉ−３Ａｌ−２．５Ｖでは９３０
℃、Ｔｉ−６Ａｌ−４Ｖでは９９０℃）以下の低温領域
でかつ高加工率の加工を行わねばならず、そのため熱間
加工性のあまり良くないチタン合金では割れの発生とい
う問題があった。Each of the above titanium alloys is required to have a uniform fine metal structure in order to further increase the strength and, in heat resistant applications, improve the heat resistant strength in a high temperature environment and the fatigue strength. Recently, with the expansion of applications,
A material having high strength from room temperature to high temperature, which is expanded from the conventional use environment, has been desired.
Titanium alloys may be used in the as-cast state depending on the application, or may be supplied after being molded into various shapes such as plates, wires, pipes and shapes after casting. But,
The as-cast material has a problem that strength and ductility are poor due to the coarse cast structure, and in order to obtain a fine structure β
Transformation point (for example, 930 for Ti-3Al-2.5V
C., Ti-6Al-4V must be processed in a low temperature region of 990.degree. C. or less and with a high workability, and therefore, there is a problem that cracks occur in a titanium alloy having poor hot workability.
【０００５】[0005]
【発明が解決しようとする課題】本発明は上記の要望に
応えるべく、また問題点を解消するために、α型、α＋
β型およびβ型チタン合金において、常温および高温に
おける強度を向上させた均一微細組織をなすチタン合金
を提供することを目的とする。SUMMARY OF THE INVENTION In order to meet the above-mentioned demands and to solve the problems, the present invention is α type, α + type
It is an object of the present invention to provide a β-type and β-type titanium alloy having a uniform microstructure with improved strength at room temperature and high temperature.
【０００６】[0006]
【課題を解決するための手段および作用】本発明者は、
チタン合金にＯを添加し、かつＰ，Ａｓ，Ｓｂ，Ｂｉ，
Ｓ，Ｓｅ，Ｔｅ，Ｂの１種または２種以上を添加する
と、その複合効果によって鋳造まま材および熱間加工材
において強度が向上し、かつ均一微細組織を得ることを
知見した。特に、鋳造ままで均一微細組織が得られるの
で、その後の加工工程においても従来のα＋β域加工の
ような加工温度範囲の制限が緩和できることがわかっ
た。Means and Actions for Solving the Problems
O is added to the titanium alloy, and P, As, Sb, Bi,
It was found that the addition of one or more of S, Se, Te, and B improves the strength of the as-cast material and the hot-worked material and obtains a uniform fine structure due to its composite effect. In particular, since it is possible to obtain a uniform fine structure as cast, it has been found that the limitation of the processing temperature range, which is the case in the conventional α + β region processing, can be relaxed even in the subsequent processing steps.
【０００７】本発明はこのような知見に基づくもので、
その要旨はつぎのとおりである。すなわち、 （１）α型、α＋β型あるいはβ型チタン合金におい
て、重量％にてＯを０．１〜０．８％添加し、かつＰ，
Ａｓ，Ｓｂ，Ｂｉ，Ｓ，Ｓｅ，Ｔｅ，Ｂの１種または２
種以上を重量％にて合計０．００１〜０．５％添加した
ことを特徴とする均一微細組織の高強度チタン合金。 （２）重量％にてＡｌ：０．５〜７％を含有し、残部が
Ｔｉおよび不可避的不純物からなるα型チタン合金にお
いて、重量％にてＯを０．１〜０．８％添加し、かつ
Ｐ，Ａｓ，Ｓｂ，Ｂｉ，Ｓ，Ｓｅ，Ｔｅ，Ｂの１種また
は２種以上を重量％にて合計０．００１〜０．５％添加
したことを特徴とする均一微細組織の高強度チタン合
金。 （３）重量％にてＡｌ：０．５〜７％およびＳｎ：１〜
６％を含有し、残部がＴｉおよび不可避的不純物からな
るα型チタン合金において、重量％にてＯを０．１〜
０．８％添加し、かつＰ，Ａｓ，Ｓｂ，Ｂｉ，Ｓ，Ｓ
ｅ，Ｔｅ，Ｂの１種または２種以上を重量％にて合計
０．００１〜０．５％添加したことを特徴とする均一微
細組織の高強度チタン合金。 （４）重量％にてＶ：０．２〜７％を含有し、残部がＴ
ｉおよび不可避的不純物からなるα＋β型チタン合金に
おいて、重量％にてＯを０．１〜０．８％添加し、かつ
Ｐ，Ａｓ，Ｓｂ，Ｂｉ，Ｓ，Ｓｅ，Ｔｅ，Ｂの１種また
は２種以上を重量％にて合計０．００１〜０．５％添加
したことを特徴とする均一微細組織の高強度チタン合
金。 （５）重量％にてＡｌ：０．５〜７％およびＶ：０．２
〜１２％を含有し、残部がＴｉおよび不可避的不純物か
らなるα＋βチタン合金において、重量％にてＯを０．
１〜０．８％添加し、かつＰ，Ａｓ，Ｓｂ，Ｂｉ，Ｓ，
Ｓｅ，Ｔｅ，Ｂの１種または２種以上を重量％にて合計
０．００１〜０．５％添加したことを特徴とする均一微
細組織の高強度チタン合金。 （６）重量％にてＡｌ：０．５〜７％と、Ｖ：０．２〜
１２％またはＭｏ：１〜７％とを含有し、さらにＳ：１
〜６％、Ｚｒ：３〜８％、Ｆｅ：０．１〜３％、Ｃｕ：
０．１〜３％の１種または２種以上を含有し、残部がＴ
ｉおよび不可避的不純物からなるα＋β型チタン合金に
おいて、重量％にてＯを０．１〜０．８％添加し、かつ
Ｐ，Ａｓ，Ｓｂ，Ｂｉ，Ｓ，Ｓｅ，Ｔｅ，Ｂの１種また
は２種以上を重量％にて合計０．００１〜０．５％添加
したことを特徴とする均一微細組織の高強度チタン合
金。および （７）重量％にてＶ，Ｍｏ，Ｃｒの１種または２種以上
を合計９〜２７％含有し、さらにＡｌ：０．５〜４％、
Ｓｎ：１〜６％、Ｚｒ：３〜８％の１種または２種以上
を含有し、残部がＴｉおよび不可避的不純物からなるβ
型チタン合金において、重量％にてＯを０．１〜０．８
％添加し、かつＰ，Ａｓ，Ｓｂ，Ｂｉ，Ｓ，Ｓｅ，Ｔ
ｅ，Ｂの１種または２種以上を重量％にて合計０．００
１〜０．５％添加したことを特徴とする均一微細組織の
高強度チタン合金である。 （８）重量％にてＦｅ：０．１〜３％およびＮ：０．０
１〜０．１２％を含有して、残部がＴｉおよび不可避的
不純物からなるα型チタン合金において、重量％にてＯ
を０．１〜０．８％添加し、かつＰ，Ａｓ，Ｓｂ，Ｂ
ｉ，Ｓ，Ｓｅ，Ｔｅ，Ｂの１種または２種以上を重量％
にて合計０．００１〜０．５％添加したことを特徴とす
る均一微細組織の高強度チタン合金。The present invention is based on such findings,
The summary is as follows. That is, (1) In an α-type, α + β-type or β-type titanium alloy, 0.1 to 0.8% of O is added in a weight% and P,
1 or 2 of As, Sb, Bi, S, Se, Te, B
A high-strength titanium alloy having a uniform microstructure, characterized in that a total of 0.001 to 0.5% by weight of the seeds is added. (2) In an α-type titanium alloy containing 0.5 to 7% by weight of Al and the balance of Ti and unavoidable impurities, 0.1 to 0.8% of O is added at the weight% of And a high level of uniform fine structure characterized by adding 0.001 to 0.5% in total of 1 or 2 or more of P, As, Sb, Bi, S, Se, Te and B in weight%. Strength titanium alloy. (3) Al: 0.5 to 7% and Sn: 1 to 1 by weight%
In an α-type titanium alloy containing 6% and the balance Ti and unavoidable impurities, 0.1% by weight of O is contained.
0.8% added, and P, As, Sb, Bi, S, S
A high-strength titanium alloy having a uniform microstructure, characterized in that one or more of e, Te, and B are added in a total amount of 0.001 to 0.5% by weight. (4) V: 0.2 to 7% by weight, with the balance being T
In an α + β type titanium alloy consisting of i and unavoidable impurities, 0.1 to 0.8% of O is added by weight% and one of P, As, Sb, Bi, S, Se, Te and B or A high-strength titanium alloy having a uniform microstructure, characterized in that two or more kinds are added in a total amount of 0.001 to 0.5% by weight. (5) Al: 0.5 to 7% and V: 0.2 in wt%
.Alpha. +. Beta. Titanium alloy containing .about.12% with the balance being Ti and unavoidable impurities, and O in an amount of 0.
1 to 0.8% addition, and P, As, Sb, Bi, S,
A high-strength titanium alloy having a uniform microstructure, characterized in that one or more of Se, Te, and B are added in a total amount of 0.001 to 0.5% by weight. (6) Al: 0.5 to 7% in weight% and V: 0.2 to
12% or Mo: 1 to 7% and further S: 1
~ 6%, Zr: 3-8%, Fe: 0.1-3%, Cu:
0.1 to 3% of 1 type or 2 types or more, and the balance is T
In an α + β type titanium alloy consisting of i and unavoidable impurities, 0.1 to 0.8% of O is added by weight% and one of P, As, Sb, Bi, S, Se, Te and B or A high-strength titanium alloy having a uniform microstructure, characterized in that two or more kinds are added in a total amount of 0.001 to 0.5% by weight. And (7) 9% to 27% in total of 1 or 2 or more kinds of V, Mo and Cr in wt%, and Al: 0.5 to 4%,
Β containing 1: 1 or 2 or more of Sn: 1 to 6% and Zr: 3 to 8%, with the balance being Ti and inevitable impurities
Type titanium alloy, O is 0.1 to 0.8% by weight.
%, And P, As, Sb, Bi, S, Se, T
One or two or more of e and B in total of 0.00 by weight%
It is a high-strength titanium alloy having a uniform microstructure, which is characterized by adding 1 to 0.5%. (8) Fe: 0.1-3% and N: 0.0% by weight
In an α-type titanium alloy containing 1 to 0.12% and the balance of Ti and unavoidable impurities, O in weight%
0.1 to 0.8%, and P, As, Sb, B
Weight percentage of one or more of i, S, Se, Te, B
0.001 to 0.5% in total is added to the high strength titanium alloy having a uniform microstructure.
【０００８】請求項１はα型、α＋β型およびβ型の各
種チタン合金に、ＯおよびＰ，Ａｓ，Ｓｂ，Ｂｉ，Ｓ，
Ｓｅ，Ｔｅ，Ｂの１種または２種以上を複合添加するこ
とにより均一微細組織とし、強度を向上させるものであ
る。α型合金の代表例としてＴｉ−５Ａｌ−２．５Ｓ
ｎ、α＋β型合金の代表例としてＴｉ−６Ａｌ−４Ｖお
よびＴｉ−３Ａｌ−２．５Ｖ、およびβ型合金の代表例
としてＴｉ−１５Ｖ−３Ｃｒ−３Ｓｎ−３Ａｌを選び、
Ｏと、ＰおよびＡｓ、Ｓｂ，Ｂｉ，Ｓ，Ｓｅ，Ｔｅ，Ｂ
とを複合添加した材料を溶製して棒材を製造し、常温お
よび高温での引張強度および組織を調べた。その結果、
ＰおよびＡｓ、Ｓｂ，Ｂｉ，Ｓ，Ｓｅ，Ｔｅ，Ｂの各元
素はＴｉと化合物を形成し、これがＯと共存するとマト
リックスの強化とともに複合化合物として微細分散し、
均一微細な鋳造組織が得られることを知見した。そし
て、この組織の細粒化とＯ，Ｐ等の固溶強化が相伴っ
て、顕著な高強度化が図られると同時に加工性が向上す
る。そしてこの効果は、Ｏを０．１重量％以上添加し、
かつＰなどの元素の１種または２種以上を合計０．００
１重量％以上添加したときに現れ、Ｏを０．８重量％を
超えて、かつＰなどの元素の１種または２種以上を合計
０．５重量％を超えて添加した場合は、組織の微細化効
果が顕著でなくなるとともに、延性が低下する。また、
Ｏが０．１重量％未満添加の場合やＰなどの元素の１種
または２種以上が合計０．００１重量％未満添加の場
合、およびＯが０．１重量％未満かつＰなどの元素の１
種または２種以上が合計０．００１重量％未満添加の場
合には、組織の均一細粒効果が認められにくい。従って
請求項１においてＯを０．１〜０．８重量％添加し、か
つＰ，Ａｓ，Ｓｂ，Ｂｉ，Ｓ，Ｓｅ，Ｔｅ，Ｂの１種ま
たは２種以上を重量％にて合計０．００１〜０．５％添
加させることとした。According to claim 1, various kinds of α-type, α + β-type and β-type titanium alloys are provided with O and P, As, Sb, Bi, S,
By adding one or more of Se, Te and B in combination, a uniform fine structure is obtained and the strength is improved. Ti-5Al-2.5S is a typical example of α-type alloy.
n, Ti-6Al-4V and Ti-3Al-2.5V as typical examples of α + β type alloys, and Ti-15V-3Cr-3Sn-3Al as typical examples of β type alloys,
O, P and As, Sb, Bi, S, Se, Te, B
A bar material was manufactured by melting a material to which and were added in combination, and the tensile strength and the structure at normal temperature and high temperature were examined. as a result,
Each element of P and As, Sb, Bi, S, Se, Te and B forms a compound with Ti, and when it coexists with O, it is finely dispersed as a composite compound together with strengthening of the matrix,
It was found that a uniform and fine cast structure can be obtained. The fine graining of the structure and the solid solution strengthening of O, P, etc. are accompanied with each other, so that the strength is remarkably increased and the workability is improved at the same time. And the effect is to add O by 0.1% by weight or more,
And the total amount of one or more elements such as P is 0.00
It appears when 1 wt% or more is added, and if O is added in an amount of more than 0.8 wt% and one or more elements such as P are added in an amount of more than 0.5 wt% in total, The miniaturization effect becomes insignificant and the ductility decreases. Also,
When O is added in an amount of less than 0.1% by weight, when one or more elements such as P are added in a total amount of less than 0.001% by weight, and when O is less than 0.1% by weight and an element such as P is added. 1
When less than 0.001% by weight is added in total of two or more kinds, it is difficult to recognize the uniform fine grain effect of the structure. Therefore, 0.1 to 0.8% by weight of O is added in claim 1, and one or more of P, As, Sb, Bi, S, Se, Te, and B are added in a total amount of 0. 001 to 0.5% was added.
【０００９】請求項２はＴｉ−５．５Ａｌを代表とする
α型チタン合金を対象としたものでのある。Ａｌはα相
の安定化と固溶強化のために含有させ、その効果が０．
５重量％以上で現れ、７重量％を超えるとＴｉ3 Ａｌ金
属間化合物が析出して加工性が劣化するので、０．５〜
７重量％含有させることとした。また請求項１と同様の
理由でＯを０．１〜０．８重量％添加し、かつＰ，Ａ
ｓ，Ｓｂ，Ｂｉ，Ｓ，Ｓｅ，Ｔｅ，Ｂの１種または２種
以上を重量％にて合計０．００１〜０．５％添加させる
こととした。The second aspect is directed to an α-type titanium alloy represented by Ti-5.5Al. Al is contained for stabilizing the α phase and strengthening the solid solution, and the effect is 0.
It appears at 5 wt% or more, and if it exceeds 7 wt%, Ti 3 Al intermetallic compound precipitates and the workability deteriorates.
It was decided to contain 7% by weight. For the same reason as in claim 1, 0.1 to 0.8% by weight of O is added, and P and A are added.
One or two or more of s, Sb, Bi, S, Se, Te, and B are added in a total amount of 0.001 to 0.5% by weight.
【００１０】請求項３はＴｉ−５Ａｌ−２．５Ｓｎを代
表とするα型チタン合金を対象としたものである。Ａｌ
は請求項２と同様な理由で０．５〜７重量％含有させる
こととした。Ｓｎは固溶強化のために含有させ、その効
果が１重量％以上で現れ、６重量％を超えるとその効果
は飽和するので１〜６重量％含有させることとした。ま
た請求項１と同様の理由でＯを０．１〜０．８重量％添
加し、かつＰ，Ａｓ，Ｓｂ，Ｂｉ，Ｓ，Ｓｅ，Ｔｅ，Ｂ
の１種または２種以上を重量％にて合計０．００１〜
０．５％添加させることとした。The third aspect is directed to an α-type titanium alloy represented by Ti-5Al-2.5Sn. Al
For the same reason as in claim 2, 0.5 to 7% by weight is included. Sn is included for solid solution strengthening, and its effect appears at 1% by weight or more. If it exceeds 6% by weight, the effect is saturated, so 1 to 6% by weight is included. For the same reason as in claim 1, 0.1 to 0.8% by weight of O is added, and P, As, Sb, Bi, S, Se, Te and B are added.
0.001 to 1 or 2 or more in total by weight%
It was decided to add 0.5%.
【００１１】請求項４はＴｉ−２．５Ｖなどのα＋β型
チタン合金を対象としたものである。Ｖはβ相安定化と
固溶強化および加工性向上のために含有させ、その効果
が０．２重量％以上で現れ、Ｖのみ含有する場合７重量
％を超えるとα相が不安定化するので０．２〜７重量％
含有させることとした。また請求項１と同様の理由でＯ
を０．１〜０．８重量％添加し、かつＰ，Ａｓ，Ｓｂ，
Ｂｉ，Ｓ，Ｓｅ，Ｔｅ，Ｂの１種または２種以上を重量
％にて合計０．０１〜０．５％添加させることとした。The fourth aspect is directed to an α + β type titanium alloy such as Ti-2.5V. V is contained for stabilizing the β phase, strengthening the solid solution, and improving workability, and the effect appears at 0.2% by weight or more. When V is contained alone, the α phase becomes unstable if it exceeds 7% by weight. So 0.2 to 7% by weight
It was decided to include it. For the same reason as in claim 1, O
0.1 to 0.8% by weight, and P, As, Sb,
One or two or more of Bi, S, Se, Te, and B are added in a total amount of 0.01 to 0.5% by weight.
【００１２】請求項５はＴｉ−６Ａｌ−４Ｖ、Ｔｉ−３
Ａｌ−２．５Ｖなどのα＋β型チタン合金を対象とした
ものである。Ａｌは請求項２と同様α相の安定化と固溶
強化のために０．５〜７重量％含有させることとした。
Ｖはβ相安定化と固溶強化および加工性向上のために含
有させ、その効果が０．２重量％以上で現れ、１２重量
％を超えるとα相が不安定化するので０．２〜１２重量
％含有させることとした。また請求項１と同様の理由で
Ｏを０．１〜０．８重量％添加し、かつＰ，Ａｓ，Ｓ
ｂ，Ｂｉ，Ｓ，Ｓｅ，Ｔｅ，Ｂの１種または２種以上を
重量％にて合計０．００１〜０．５％添加させることと
した。[0012] Claim 5 is Ti-6Al-4V, Ti-3
It is intended for α + β type titanium alloys such as Al-2.5V. Similar to claim 2, Al is contained in an amount of 0.5 to 7% by weight for stabilizing the α phase and strengthening the solid solution.
V is contained for stabilizing the β phase, strengthening the solid solution and improving the workability, and the effect appears at 0.2% by weight or more, and when it exceeds 12% by weight, the α phase is destabilized, so 0.2 to 0.2%. It was decided to contain 12% by weight. For the same reason as in claim 1, 0.1 to 0.8% by weight of O is added, and P, As and S are added.
One or two or more of b, Bi, S, Se, Te, and B are added in a total amount of 0.001 to 0.5% by weight.
【００１３】請求項６はＴｉ−６Ａｌ−２Ｓｎ−４Ｚｒ
−２Ｍｏ、Ｔｉ−６Ａｌ−６Ｖ−２Ｓｎ Ｔｉ−６Ａｌ
−２Ｓｎ−４Ｚｒ−６Ｍｏ、Ｔｉ−１０Ｖ−２Ｆｅ−３
Ａｌなどのα＋β型チタン合金を対象としたものであ
る。Ａｌは請求項２と同様α相の安定化と固溶強化のた
めに０．５〜７重量％含有させることとした。Ｖまたは
Ｍｏはβ相安定化と固溶強化および加工性向上のために
含有させ、その効果はＶは０．２重量％以上、Ｍｏは１
重量％以上で現れるが、Ｖは１２重量％を超えた場合、
Ｍｏが７重量％を超えた場合はα相が不安定化するの
で、Ｖを０．２〜１２重量％含有させるかまたはＭｏを
１〜７重量％含有させることとした。Ｓｎ，Ｚｒ，Ｆ
ｅ，Ｃｕは何れも固溶強化に有効な元素であり、Ｓｎは
１重量％以上、Ｚｒは３重量％以上、ＦｅおよびＣｕは
それぞれ０．１重量％以上で効果が現れる。しかし、Ｓ
ｎが６重量％を超えた場合、Ｚｒが８重量％を超えた場
合効果が飽和し、ＦｅおよびＣｕがそれぞれ３重量％を
超えた場合は共析化合物が析出して加工性が劣化する。
従って、Ｓｎ：１〜６重量％、Ｚｒ：３〜８重量％、Ｆ
ｅ：０．１〜３重量％、Ｃｕ：０．１〜３重量％の１種
または２種以上を含有させることとした。また請求項１
と同様の理由でＯを０．１〜０．８重量％添加し、かつ
Ｐ，Ａｓ，Ｓｂ，Ｂｉ，Ｓ，Ｓｅ，Ｔｅ，Ｂの１種また
は２種以上を重量％にて合計０．００１〜０．５％添加
させることとした。Claim 6 is Ti-6Al-2Sn-4Zr
-2Mo, Ti-6Al-6V-2Sn Ti-6Al
-2Sn-4Zr-6Mo, Ti-10V-2Fe-3
It is intended for α + β type titanium alloys such as Al. Similar to claim 2, Al is contained in an amount of 0.5 to 7% by weight for stabilizing the α phase and strengthening the solid solution. V or Mo is contained for stabilizing the β phase, strengthening the solid solution and improving the workability. The effect is that V is 0.2% by weight or more and Mo is 1
Although it appears at more than 12% by weight, if V exceeds 12% by weight,
When Mo exceeds 7% by weight, the α phase becomes unstable, so it was decided to contain V in an amount of 0.2 to 12% by weight or Mo in an amount of 1 to 7% by weight. Sn, Zr, F
Both e and Cu are effective elements for solid solution strengthening, Sn is 1 wt% or more, Zr is 3 wt% or more, and Fe and Cu are 0.1 wt% or more, respectively. But S
When n exceeds 6% by weight, when Zr exceeds 8% by weight, the effect is saturated, and when Fe and Cu exceed 3% by weight, eutectoid compounds precipitate and workability deteriorates.
Therefore, Sn: 1 to 6% by weight, Zr: 3 to 8% by weight, F
One or two or more of e: 0.1 to 3% by weight and Cu: 0.1 to 3% by weight are included. Claim 1
For the same reason as above, 0.1 to 0.8% by weight of O is added, and one or more of P, As, Sb, Bi, S, Se, Te and B is added in a total amount of 0. 001 to 0.5% was added.
【００１４】請求項７はＴｉ−１３Ｖ−１１Ｃｒ−３Ａ
ｌ，Ｔｉ−３Ａｌ−８Ｖ−６Ｃｒ−４Ｍｏ−４Ｚｒ（β
ｃ合金），Ｔｉ−１１．５Ｍｏ−６Ｚｒ−４．５Ｓｎ
（βIII 合金），Ｔｉ−１５Ｖ−３Ｃｒ−３Ｓｎ−３Ａ
ｌなどのβ型チタン合金を対象としたものである。Ｖ，
Ｍｏ，Ｃｒはβ相安定化と固溶強化および加工性向上の
ために含有させ、その効果はこれら各元素の１種または
２種以上が合計９重量％以上で現れるが、２７重量％を
超えるとこれら元素が偏析しやすくなり、疲労特性をは
じめとする製品特性の向上が期待できない、また比重が
増加してチタン合金の特徴である高比強度が損なわれる
ので、１種または２種以上を合計９〜２７重量％含有さ
せることとした。Ａｌ，Ｓｎ，Ｚｒは何れも固溶強化に
有効な元素である。ＡｌおよびＳｎはさらにω相が析出
して材料の脆化を抑制する効果があって、その効果はＡ
ｌの場合は０．５重量％以上、Ｓｎの場合は１重量％以
上で現れ、Ｚｒはさらにβ相を安定化させる効果があっ
て、その効果は３重量％以上で現れる。しかしＡｌが４
重量％を超えるとβ相が不安定化し、Ｓｎが６重量％を
超えた場合およびＺｒが８重量％を超えた場合はその効
果が飽和する。従ってＡｌ：０．５〜４重量％、Ｓｎ：
１〜６重量％、Ｚｒ：３〜８重量％の１種または２種以
上を含有させることとした。また請求項１と同様の理由
でＯを０．１〜０．８重量％添加し、かつＰ，Ａｓ，Ｓ
ｂ，Ｂｉ，Ｓ，Ｓｅ，Ｔｅ，Ｂの１種または２種以上を
重量％にて合計０．００１〜０．５％添加させることと
した。A seventh aspect is Ti-13V-11Cr-3A.
1, Ti-3Al-8V-6Cr-4Mo-4Zr (β
c alloy), Ti-11.5Mo-6Zr-4.5Sn
(ΒIII alloy), Ti-15V-3Cr-3Sn-3A
It is intended for β-type titanium alloys such as l. V,
Mo and Cr are contained in order to stabilize the β phase, strengthen the solid solution and improve the workability. The effect of one or more of these elements is 9 wt% or more in total, but it exceeds 27 wt%. When these elements tend to segregate, improvement in product properties such as fatigue properties cannot be expected, and the specific gravity increases and the high specific strength characteristic of titanium alloys is impaired. It was decided to contain a total of 9 to 27% by weight. Al, Sn and Zr are all effective elements for solid solution strengthening. Al and Sn further have the effect of suppressing the embrittlement of the material due to the precipitation of the ω phase.
In the case of 1, the content is 0.5% by weight or more, and in the case of Sn, the content is 1% by weight or more, and Zr has the effect of further stabilizing the β phase, and the effect appears at 3% by weight or more. But Al is 4
When it exceeds 5% by weight, the β phase becomes unstable, and when Sn exceeds 6% by weight and when Zr exceeds 8% by weight, the effect is saturated. Therefore, Al: 0.5 to 4% by weight, Sn:
1 to 6% by weight, Zr: 3 to 8% by weight, and one or more types are included. For the same reason as in claim 1, 0.1 to 0.8% by weight of O is added, and P, As and S are added.
One or two or more of b, Bi, S, Se, Te, and B are added in a total amount of 0.001 to 0.5% by weight.
【００１５】請求項８はＴｉ−０．５Ｆｅ−０．０５Ｎ
合金などのα型チタン合金を対象としたものである。Ｆ
ｅは請求項６と同様に固溶強化のため０．１〜３重量％
含有させることとした。Ｎも固溶強化のため含有させ、
その効果は０．０１重量％以上で現れるが、０．１２重
量％を越えた場合は延性の劣化傾向が認められる。従っ
て、Ｆｅ：０．１〜３重量％、Ｎ：０．０１〜０．１２
重量％含有させることとした。また請求項１と同様の理
由でＯを０．１〜０．８重量％添加し、かつＰ，Ａｓ，
Ｓｂ，Ｂｉ，Ｓ，Ｓｅ，Ｔｅ，Ｂの１種または２種以上
を重量％にて合計０．００１〜０．５％添加させること
とした。The eighth aspect is Ti-0.5Fe-0.05N.
It is intended for α-type titanium alloys such as alloys. F
e is 0.1 to 3% by weight for solid solution strengthening as in claim 6.
It was decided to include it. N is also included for solid solution strengthening,
The effect appears at 0.01% by weight or more, but when it exceeds 0.12% by weight, a tendency of deterioration of ductility is recognized. Therefore, Fe: 0.1 to 3% by weight, N: 0.01 to 0.12
It has been decided to include it by weight%. For the same reason as in claim 1, 0.1 to 0.8% by weight of O is added, and P, As,
One or two or more kinds of Sb, Bi, S, Se, Te and B are added in a total amount of 0.001 to 0.5% by weight.
【００１６】本発明によるチタン合金は、鋳造まま材と
して、および鋳造材を熱間圧延や熱間押出また必要に応
じて冷間圧延等の加工を行い板、線、棒、形材などの各
種形状としても提供でき、またこれらに溶接施工を施し
た溶接構造材および溶接時の溶接材料としても提供可能
である。さらに粉末成形材としても提供可能である。特
に、鋳造ままでも微細組織を得ることができるので、そ
の後の加工工程において加工温度範囲の制限が緩和さ
れ、また熱処理条件なども同様に緩和でき、割れなど発
生することなく従来材よりも容易に加工できるなどの特
徴がある。さらに、本発明による材料を従来のような条
件範囲で加工−熱処理を行うとさらに均一微細な組織が
得られる。The titanium alloy according to the present invention can be used as an as-cast material, and by subjecting the cast material to hot rolling, hot extrusion, and if necessary, cold rolling, etc., to obtain various materials such as plates, wires, rods and shapes. It can be provided as a shape, and can also be provided as a welded structural material obtained by performing a welding process on these and a welding material at the time of welding. Further, it can be provided as a powder molding material. In particular, since it is possible to obtain a fine structure even in the as-cast state, restrictions on the processing temperature range can be relaxed in subsequent processing steps, and heat treatment conditions can also be relaxed in a similar manner. It has features such as processing. Furthermore, when the material according to the present invention is processed and heat-treated in the conventional condition range, a more uniform and finer structure can be obtained.
【００１７】[0017]
【実施例】表１〜表４に示す成分の各種チタン合金を溶
解、鋳造した。そして１１００℃に加熱後熱間押出によ
り製造した丸棒より直径１０mmの引張試験片で、常温お
よび４００℃の高温引張試験を行い耐力を測定した。そ
の結果を、表に示すように本発明は何れも比較例に対し
て常温および高温強度が優れたものであり、本発明例の
鋳造材組織は何れも従来例に比べて微細均一な組織であ
つた。その代表例として、表１の本発明例No．１２およ
び表４の比較例No．６７の鋳造まま材の組織を図１に示
す。本発明による組織の微細化効果が明瞭である。な
お、ＰまたはＯの添加量を過多にした比較例の表４No．
５３，５４，５６，５９，６１は、熱間押出できたもの
の割れが発生した。EXAMPLES Various titanium alloys having the components shown in Tables 1 to 4 were melted and cast. Then, after heating to 1100 ° C., a tensile test piece having a diameter of 10 mm was made from a round bar manufactured by hot extrusion, and a high temperature tensile test at room temperature and 400 ° C. was performed to measure the yield strength. The results, as shown in the table, the present invention is excellent in room temperature and high temperature strength in comparison with Comparative Examples, the casting material structure of the present invention example is a fine and uniform structure compared to the conventional example. Atsuta As a representative example thereof, the invention example No. 12 and Comparative Example No. 4 in Table 4. The structure of the as-cast 67 material is shown in FIG. The effect of refining the structure according to the present invention is clear. In addition, Table 4 No. of the comparative example in which the addition amount of P or O was excessive.
Nos. 53, 54, 56, 59, 61 were cracked although they could be hot extruded.
【００１８】[0018]
【表１】 [Table 1]
【００１９】[0019]
【表２】 [Table 2]
【００２０】[0020]
【表３】 [Table 3]
【００２１】[0021]
【表４】 [Table 4]
【００２２】[0022]
【発明の効果】本発明により、α型、α＋β型チタン合
金材において、常温および高温強度に優れ、かつ微細化
均一組織をなす材料が提供され、比強度が高くかつ耐食
性が良いチタン合金の特性が維持されるとともに、従来
よりも高温での使用が可能となる。また、鋳造まま材料
でも微細均一な組織をなす、強度、延性に優れた材料を
提供することが可能となり、その工業的効果は著しい。EFFECTS OF THE INVENTION According to the present invention, there is provided an α-type or α + β-type titanium alloy material which is excellent in normal temperature and high temperature strength and has a finely-divided uniform structure. It can be used at a higher temperature than before. Further, it becomes possible to provide a material having excellent strength and ductility, which has a fine and uniform structure even in the as-cast material, and its industrial effect is remarkable.
【図１】写真は実施例に記述した本発明例（ａ）および
比較例（ｂ）の金属組織を示す。FIG. 1 is a photograph showing the metal structures of the inventive example (a) and the comparative example (b) described in the examples.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 花村 年裕 神奈川県川崎市中原区井田1618番地 新日 本製鐵株式会社先端技術研究所内 (72)発明者 高村 仁一 神奈川県川崎市中原区井田1618番地 新日 本製鐵株式会社先端技術研究所内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshihiro Hanamura 1618 Ida, Nakahara-ku, Kawasaki-shi, Kanagawa Inside Nippon Steel Corporation Advanced Technology Research Laboratories (72) Inventor, Shinichi Takamura, Ida 1618 Nippon Steel Corporation Advanced Technology Research Laboratories
Claims (8)
において、重量％にてＯを０．１〜０．８％添加し、か
つＰ，Ａｓ，Ｓｂ，Ｂｉ，Ｓ，Ｓｅ，Ｔｅ，Ｂの１種ま
たは２種以上を重量％にて合計０．００１〜０．５％添
加したことを特徴とする均一微細組織の高強度チタン合
金。1. An α-type, α + β-type or β-type titanium alloy containing 0.1 to 0.8% by weight of O and P, As, Sb, Bi, S, Se, Te, B. 0.001 to 0.5% by weight in total of one or more of the above is added to the high strength titanium alloy having a uniform microstructure.
し、残部がＴｉおよび不可避的不純物からなるα型チタ
ン合金において、重量％にてＯを０．１〜０．８％添加
し、かつＰ，Ａｓ，Ｓｂ，Ｂｉ，Ｓ，Ｓｅ，Ｔｅ，Ｂの
１種または２種以上を重量％にて合計０．００１〜０．
５％添加したことを特徴とする均一微細組織の高強度チ
タン合金。2. An α-type titanium alloy containing Al: 0.5 to 7% by weight, the balance being Ti and unavoidable impurities, and 0.1 to 0.8% O by weight. In addition, one or more of P, As, Sb, Bi, S, Se, Te, and B are added in a total amount of 0.001 to 0.
A high-strength titanium alloy having a uniform microstructure characterized by being added at 5%.
ｎ：１〜６％を含有し、残部がＴｉおよび不可避的不純
物からなるα型チタン合金において、重量％にてＯを
０．１〜０．８％添加し、かつＰ，Ａｓ，Ｓｂ，Ｂｉ，
Ｓ，Ｓｅ，Ｔｅ，Ｂの１種または２種以上を重量％にて
合計０．００１〜０．５％添加したことを特徴とする均
一微細組織の高強度チタン合金。3. Al: 0.5 to 7% by weight% and S
In an α-type titanium alloy containing n: 1 to 6% and the balance of Ti and unavoidable impurities, 0.1 to 0.8% of O is added by weight% and P, As, Sb, Bi are added. ，
A high-strength titanium alloy having a uniform microstructure, wherein one or more of S, Se, Te, and B are added in a total amount of 0.001 to 0.5% by weight.
残部がＴｉおよび不可避的不純物からなるα＋β型チタ
ン合金において、重量％にてＯを０．１〜０．８％添加
し、かつＰ，Ａｓ，Ｓｂ，Ｂｉ，Ｓ，Ｓｅ，Ｔｅ，Ｂの
１種または２種以上を重量％にて合計０．００１〜０．
５％添加したことを特徴とする均一微細組織の高強度チ
タン合金。4. V: 0.2 to 7% in weight%,
In an α + β titanium alloy, the balance of which is Ti and unavoidable impurities, 0.1 to 0.8% of O is added by weight%, and 1 of P, As, Sb, Bi, S, Se, Te and B is added. Or a total of 0.001 to 0.
A high-strength titanium alloy having a uniform microstructure characterized by being added at 5%.
Ｖ：０．２〜１２％を含有し、残部がＴｉおよび不可避
的不純物からなるα＋β型チタン合金において、重量％
にてＯを０．１〜０．８％添加し、かつＰ，Ａｓ，Ｓ
ｂ，Ｂｉ，Ｓ，Ｓｅ，Ｔｅ，Ｂの１種または２種以上を
重量％にて合計０．００１〜０．５％添加したことを特
徴とする均一微細組織の高強度チタン合金。5. An α + β titanium alloy containing Al: 0.5 to 7% and V: 0.2 to 12% by weight, the balance being Ti and inevitable impurities.
0.1 to 0.8% of O is added, and P, As, S
A high-strength titanium alloy having a uniform microstructure, wherein one or more of b, Bi, S, Se, Te, and B are added in a total amount of 0.001 to 0.5% by weight.
０．２〜１２％またはＭｏ：１〜７％とを含有し、さら
にＳｎ：１〜６％、Ｚｒ：３〜８％、Ｆｅ：０．１〜３
％、Ｃｕ：０．１〜３％の１種または２種以上を含有
し、残部がＴｉおよび不可避的不純物からなるα＋β型
チタン合金において、重量％にてＯを０．１〜０．８％
添加し、かつＰ，Ａｓ，Ｓｂ，Ｂｉ，Ｓ，Ｓｅ，Ｔｅ，
Ｂの１種または２種以上を重量％にて合計０．００１〜
０．５％添加したことを特徴とする均一微細組織の高強
度チタン合金。6. A weight ratio of Al: 0.5 to 7% and V:
0.2 to 12% or Mo: 1 to 7%, Sn: 1 to 6%, Zr: 3 to 8%, Fe: 0.1 to 3
%, Cu: 0.1 to 3% of one or more kinds, and the balance is an α + β type titanium alloy consisting of Ti and unavoidable impurities.
And P, As, Sb, Bi, S, Se, Te,
0.001 to 1 in total of 1 or 2 or more of B in% by weight.
A high-strength titanium alloy having a uniform microstructure, which is characterized by adding 0.5%.
２種以上を合計９〜２７％含有し、さらにＡｌ：０．５
〜４％、Ｓｎ：１〜６％、Ｚｒ：３〜８％の１種または
２種以上を含有し、残部がＴｉおよび不可避的不純物か
らなるβ型チタン合金において、重量％にてＯを０．１
〜０．８％添加し、かつＰ，Ａｓ，Ｓｂ，Ｂｉ，Ｓ，Ｓ
ｅ，Ｔｅ，Ｂの１種または２種以上を重量％にて合計
０．００１〜０．５％添加したことを特徴とする均一微
細組織の高強度チタン合金。7. A total of 9 to 27% by weight of one or more of V, Mo and Cr, and further, Al: 0.5.
.About.4%, Sn: 1 to 6%, Zr: 3 to 8%, one or two or more kinds, and the balance is Ti and inevitable impurities. .1
~ 0.8% added, and P, As, Sb, Bi, S, S
A high-strength titanium alloy having a uniform microstructure, characterized in that one or more of e, Te, and B are added in a total amount of 0.001 to 0.5% by weight.
Ｎ：０．０１〜０．１２％を含有して、残部がＴｉおよ
び不可避的不純物からなるα型チタン合金において、重
量％にてＯを０．１〜０．８％添加し、かつＰ，Ａｓ，
Ｓｂ，Ｂｉ，Ｓ，Ｓｅ，Ｔｅ，Ｂの１種または２種以上
を重量％にて合計０．００１〜０．５％添加したことを
特徴とする均一微細組織の高強度チタン合金。8. An α-type titanium alloy containing Fe: 0.1 to 3% and N: 0.01 to 0.12% by weight, with the balance being Ti and inevitable impurities. 0.1 to 0.8% of O is added, and P, As,
A high-strength titanium alloy having a uniform microstructure, wherein one or more kinds of Sb, Bi, S, Se, Te, and B are added in a total amount of 0.001 to 0.5% by weight.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6059991 | 1991-03-25 | ||
| JP3-60599 | 1991-03-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05279773A true JPH05279773A (en) | 1993-10-26 |
Family
ID=13146873
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4052956A Pending JPH05279773A (en) | 1991-03-25 | 1992-03-11 | High strength titanium alloy having fine and uniform structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05279773A (en) |
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| JP2002285268A (en) * | 2001-03-26 | 2002-10-03 | Toyota Central Res & Dev Lab Inc | Titanium alloy and production method therefor |
| WO2003085144A1 (en) * | 2002-04-11 | 2003-10-16 | Nippon Steel Corporation | Automobile part made from titanium |
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1992
- 1992-03-11 JP JP4052956A patent/JPH05279773A/en active Pending
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