JP3306878B2 - α + β type Ti alloy - Google Patents
α + β type Ti alloyInfo
- Publication number
- JP3306878B2 JP3306878B2 JP15979491A JP15979491A JP3306878B2 JP 3306878 B2 JP3306878 B2 JP 3306878B2 JP 15979491 A JP15979491 A JP 15979491A JP 15979491 A JP15979491 A JP 15979491A JP 3306878 B2 JP3306878 B2 JP 3306878B2
- Authority
- JP
- Japan
- Prior art keywords
- alloy
- present
- type
- forging
- less
- 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
Description
【０００１】[0001]
【産業上の利用分野】この発明はα＋β型Ｔｉ合金に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an α + β type Ti alloy.
【０００２】［従来の技術及び発明が解決しようとする
課題］ Ｔｉ合金は軽量性，優れた耐食性，耐熱性，比強度等を
有することから自動車用エンジン部品（コンロッド，バ
ルブ等），航空機エンジン部品（コンプレッサーディス
ク，ブレード等）その他の軽量且つ高強度を必要とする
各種構造用部材に広く用いられている。[Problems to be Solved by Conventional Techniques and Inventions] Ti alloys have light weight, excellent corrosion resistance, heat resistance, specific strength, etc., and are therefore used in automobile engine parts (such as connecting rods and valves) and aircraft engine parts. (Compressor disks, blades, etc.) are widely used for various structural members requiring light weight and high strength.
【０００３】その代表的なものがα＋β型の６Ａｌ−４
Ｖ−Ｔｉ合金であり、チタン合金使用量の約７５％を占
めている。A typical example is α + β type 6Al-4.
V-Ti alloy, which accounts for about 75% of the amount of titanium alloy used.
【０００４】しかしながら６Ａｌ−４Ｖ−Ｔｉ合金は高
価なＶ原料を使用しているため、コストが高いものとな
ってしまう問題を有している。However, since the 6Al-4V-Ti alloy uses an expensive V material, there is a problem that the cost is high.
【０００５】[0005]
【課題を解決するための手段】本発明はこのような事情
を背景とし、工業的に安価に製造でき、機械的性質も６
Ａｌ−４Ｖ−Ｔｉ合金と同等以上であるα＋β型Ｔｉ合
金を提供することを目的として成されたもので、その要
旨は、質量％でＡｌ：５．５〜７．０％，Ｆｅ：０．５
〜４．０％，Ｏ：０．５％以下，残部Ｔｉ及び不可避的
不純物から成るようにしたことにある。SUMMARY OF THE INVENTION Under such circumstances, the present invention can be industrially manufactured at low cost and has a mechanical property of 6%.
The purpose of the present invention is to provide an α + β-type Ti alloy that is equal to or more than an Al-4V-Ti alloy, and the gist of the invention is that Al: 5.5 to 7. 0% , Fe: 0.5
~ 4. 0% , O: 0.5% or less, with the balance being Ti and unavoidable impurities.
【０００６】以上のように本発明はＶに代えてＦｅを用
いるようにしたものである。ＦｅはＶと同様β相を安定
化する元素であって、これを上記所定比率で含有させる
ことにより従来の６Ａｌ−４Ｖ−Ｔｉ合金と同等以上の
機械的性質を付与することができる。As described above, the present invention uses Fe in place of V. Fe is an element that stabilizes the β phase, like V, and by containing it at the above-mentioned predetermined ratio, it is possible to impart mechanical properties equal to or higher than that of the conventional 6Al-4V-Ti alloy.
【０００７】しかもこのＦｅはＶに比べて安価な元素で
あるから、Ｔｉ合金を工業的に安価に製造できるように
なる。[0007] Moreover, since Fe is a cheaper element than V, Ti alloy can be industrially manufactured at low cost.
【０００８】本発明においては、上記成分に加え更にＣ
ｒ，Ｎｉの１種若しくは２種を質量％でＣｒ：２．０％
以下，Ｎｉ：２．０％以下の量で含有させることができ
る。In the present invention, in addition to the above components, C
one or two of r and Ni in mass% of Cr: 2. 0%
Hereinafter, Ni: 2. It may be contained in an amount of at 0% or.
【０００９】ここでＮｉ，ＣｒはＦｅと同様Ｔｉ合金に
おけるβ相を安定化するものであり、Ｆｅと併せて或い
はその一部を置換する形で添加することができる。Here, Ni and Cr, like Fe, stabilize the β phase in the Ti alloy, and can be added together with Fe or by replacing a part thereof.
【００１０】次に本発明における各成分の限定理由を詳
述する。 Ａｌ：５．５〜７．０％ Ａｌは主としてα相に固溶し強化する元素であり、機械
的性質を向上させるために５．５％以上含有させること
が必要である。但し７．０％を超えて含有させるとα２
（Ｔｉ３Ａｌ）を析出するようになり、延性が低下して
しまう。本発明では７．０％を上限値とする。Next, the reasons for limiting each component in the present invention will be described in detail.
Will be described. Al: 5.5 to 7.0% Al is an element that forms a solid solution in the α phase and strengthens it.
4. To improve the mechanical properties5%Above
is necessary. However, 7.0%When contained in excess of α2
(Ti3Al) precipitates, and the ductility decreases.
I will. In the present invention, 7.0%Is the upper limit.
【００１１】Ｆｅ：０．５〜４．０％ Ｆｅは主としてβ相に固溶する元素であり、所定量含有
させることによって機械的性質が向上する。Ｆｅの添加
はまた、製造性（熱間加工性），熱処理性を改善する上
においても有効である。但しＦｅは溶解する上で偏析し
易い元素であり、４．０％以下とすることが必要であ
る。Fe: 0.5-4.0% Fe is an element that is mainly dissolved in the β phase and contains a predetermined amount.
By doing so, the mechanical properties are improved. Addition of Fe
Also improves manufacturability (hot workability) and heat treatment.
It is also effective in However, Fe segregates as it dissolves
3. Easy element.0%It is necessary to
You.
【００１２】Ｎｉ：２．０％以下 Ｃｒ：２．０％以下 Ｎｉ，ＣｒはＦｅと同様の働きをする元素であり、上述
のようにＦｅと併せて或いは一部置換する形で添加す
る。但しこれらは何れも金属間化合物（ＴｉＣｒ２，Ｔ
ｉ２Ｎｉ）を形成し易い元素であり、２．０％を超えて
含有させると延性の低下をもたらす。Ni: 2. 0% or less Cr: 2. 0% or less Ni and Cr are elements having the same function as Fe, and are added together with Fe or in a form of partially substituting as described above. However, these are all intermetallic compounds (TiCr 2 , T
i. 2 Ni) is an element that easily forms; If the content exceeds 0% , the ductility is reduced.
【００１３】Ｏ：０．５％以下 ＯはＡｌと同様の働きをする元素であり、Ａｌの一部を
置き換える形で含有させることができる。しかしＯは侵
入型元素であり、上記の上限値を超えて含有させると急
激な延性低下をもたらす。O: 0. 5% or less O is an element having the same function as Al, and can be contained by replacing part of Al. However, O is an interstitial element, and if it is contained in excess of the above upper limit, a sharp drop in ductility is brought about.
【００１４】[0014]
【実施例】次に本発明の特徴を更に明確にすべく、以下
にその実施例を詳述する。 ［実施例１］ プラズマ炉で溶解した１０ｋｇのインゴットを分塊鍛造
後α＋β域の９００℃での鍛伸により直径２０ｍｍの棒
材（鍛伸率７５％）にして特性を評価した。熱処理は７
５０℃で２時間の焼鈍を実施した。結果が表１及び図１
に示してある。Next, in order to further clarify the features of the present invention, examples thereof will be described in detail below. Example 1 A 10 kg ingot melted in a plasma furnace was subjected to forging at a temperature of 900 ° C. in the α + β region after forging at a temperature of 900 ° C. to obtain a rod having a diameter of 20 mm (forging and elongation rate: 75%), and the characteristics were evaluated. Heat treatment 7
Annealing was performed at 50 ° C. for 2 hours. The results are shown in Table 1 and FIG.
It is shown in
【００１５】但し図１は横軸にＦｅの量を、また縦軸に
伸び，絞り，０．２％耐力，引張強さ等の特性をとって
ある。また同図においては比較のために６Ａｌ−４Ｖ−
Ｔｉの特性も併せて示してある。In FIG. 1, the abscissa represents the amount of Fe, and the ordinate represents elongation, drawing, 0.2% proof stress, tensile strength and other characteristics. In the figure, for comparison, 6Al-4V-
The characteristics of Ti are also shown.
【００１６】[0016]
【表１】 [Table 1]
【００１７】この結果から、４質量％以下の範囲におい
てＦｅの添加量の増大とともに引張強さ，０．２％耐力
が増大すること、また６Ａｌ−４Ｖ−Ｔｉと同等以上の
機械的特性が得られることが分かる。From these results, in the range of 4% by mass or less, the tensile strength and 0.2% proof stress increase with the addition amount of Fe, and mechanical properties equal to or higher than 6Al-4V-Ti are obtained. It is understood that it can be done.
【００１８】［実施例２］ 本発明の合金は鍛伸状態での使用も可能である。表２に
鍛伸状態での特性が示してある。但し供試材は５．９５
Ａｌ−３．３１Ｆｅ−０．１０［Ｏ］−Ｔｉである。Example 2 The alloy of the present invention can be used in a forged state. Table 2 shows the properties in the forged state. However, the test material was 5.95.
Al-3.31Fe-0.10 [O] -Ti.
【００１９】[0019]
【表２】 [Table 2]
【００２０】尚この実施例は、本発明の合金の場合、鍛
造開始温度が供試材の変態点（９８０℃）よりも高温で
あっても鍛造終了時の温度がα＋β相の領域であれば、
或いは変態点直上の温度であっても鍛造が可能であるこ
とを示している。In this embodiment, in the case of the alloy of the present invention, even if the forging start temperature is higher than the transformation point (980 ° C.) of the test material, the temperature at the end of forging is in the α + β phase region. ,
Or it shows that forging is possible even at a temperature just above the transformation point.
【００２１】以上本発明の実施例を詳述したがこれはあ
くまで一例示であり、本発明はその主旨を逸脱しない範
囲において、当業者の知識に基づき様々な変更を加えた
形態で構成可能である。Although the embodiment of the present invention has been described in detail above, this is merely an example, and the present invention can be configured in various modified forms based on the knowledge of those skilled in the art without departing from the gist of the present invention. is there.
【図１】本発明の一実施例において得られたＦｅ添加量
と機械的緒特性との関係を示す図である。FIG. 1 is a graph showing the relationship between the amount of Fe added and the mechanical characteristics obtained in one example of the present invention.
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) C22C 1/00 - 49/14 ──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. 7 , DB name) C22C 1/00-49/14
Claims (2)
ｅ：０．５〜４．０％，Ｏ：０．５％以下，残部Ｔｉ及
び不可避的不純物から成るα＋β型Ｔｉ合金。1. A mass% Al: 5.5 to 7. 0% , F
e: 0.5-4. 0%, O: 0.5% or less, α + β-type Ti alloy comprising Ti and unavoidable impurities.
若しくは２種を質量％でＣｒ：２．０％以下，Ｎｉ：
２．０％以下の量で含有することを特徴とする請求項１
に記載のα＋β型Ｔｉ合金。Wherein in addition to said components, Cr further Cr, one or two N i in mass%: 2. 0% or less, Ni:
2. Claim 1, characterized in that it contains an amount of at 0% or
Α + β-type Ti alloy according to the above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15979491A JP3306878B2 (en) | 1991-06-04 | 1991-06-04 | α + β type Ti alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15979491A JP3306878B2 (en) | 1991-06-04 | 1991-06-04 | α + β type Ti alloy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04358036A JPH04358036A (en) | 1992-12-11 |
| JP3306878B2 true JP3306878B2 (en) | 2002-07-24 |
Family
ID=15701414
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15979491A Expired - Lifetime JP3306878B2 (en) | 1991-06-04 | 1991-06-04 | α + β type Ti alloy |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3306878B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012108319A1 (en) | 2011-02-10 | 2012-08-16 | 新日本製鐵株式会社 | Abrasion-resistant titanium alloy member having excellent fatigue strength |
| WO2014027677A1 (en) | 2012-08-15 | 2014-02-20 | 新日鐵住金株式会社 | Resource-saving titanium alloy member having excellent strength and toughness, and method for manufacturing same |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6001495A (en) * | 1997-08-04 | 1999-12-14 | Oregon Metallurgical Corporation | High modulus, low-cost, weldable, castable titanium alloy and articles thereof |
| US20100178996A1 (en) * | 2008-12-31 | 2010-07-15 | Taylor Made Golf Company, Inc. | Titanium alloy for golf-club heads, and clubheads comprising same |
| KR101346808B1 (en) * | 2010-12-13 | 2014-01-03 | 한국기계연구원 | The Titanium alloy improved mechanical properties and the manufacturing method thereof |
| JP5196083B2 (en) | 2011-02-24 | 2013-05-15 | 新日鐵住金株式会社 | High-strength α + β-type titanium alloy hot-rolled sheet excellent in cold coil handling and manufacturing method thereof |
| JP5831283B2 (en) * | 2012-02-17 | 2015-12-09 | 新日鐵住金株式会社 | Titanium alloy member whose shape is deformed in the same direction as the processing direction by heat treatment and its manufacturing method |
| CN104136639B (en) * | 2012-02-24 | 2016-11-23 | 新日铁住金株式会社 | Golf club face titanium alloy |
-
1991
- 1991-06-04 JP JP15979491A patent/JP3306878B2/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012108319A1 (en) | 2011-02-10 | 2012-08-16 | 新日本製鐵株式会社 | Abrasion-resistant titanium alloy member having excellent fatigue strength |
| WO2014027677A1 (en) | 2012-08-15 | 2014-02-20 | 新日鐵住金株式会社 | Resource-saving titanium alloy member having excellent strength and toughness, and method for manufacturing same |
| KR20150012287A (en) | 2012-08-15 | 2015-02-03 | 신닛테츠스미킨 카부시키카이샤 | Resource-saving titanium alloy member having excellent strength and toughness, and method for manufacturing same |
| US9689062B2 (en) | 2012-08-15 | 2017-06-27 | Nippon Steel & Sumitomo Metal Corporation | Resource saving-type titanium alloy member possessing improved strength and toughness and method for manufacturing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04358036A (en) | 1992-12-11 |
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