JPH08165533A - Titanium alloy - Google Patents
Titanium alloyInfo
- Publication number
- JPH08165533A JPH08165533A JP14308295A JP14308295A JPH08165533A JP H08165533 A JPH08165533 A JP H08165533A JP 14308295 A JP14308295 A JP 14308295A JP 14308295 A JP14308295 A JP 14308295A JP H08165533 A JPH08165533 A JP H08165533A
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- Prior art keywords
- titanium
- alloy
- cold
- hardness
- working
- Prior art date
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、冷間加工によって所定
形状にまで加工したときに高硬度となり所要強度が確保
できるチタン合金に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a titanium alloy which has a high hardness when processed into a predetermined shape by cold working and can secure a required strength.
【０００２】[0002]
【従来の技術】ところで、最近、チタンのもつ軽量かつ
高強度でありすぐれた耐食性を示すという特性を利用
し、チタン製の時計側が実用化されてきている。2. Description of the Related Art Recently, a watch made of titanium has been put to practical use by utilizing the characteristics of titanium, which is lightweight, high-strength and has excellent corrosion resistance.
【０００３】ところが、純チタンでは現在、時計側に最
も多く用いられている洋白 (Cu−Ni−Zn合金) に比べて
60％加工後の硬度が230(Hv) と硬さが低く、軽量化がそ
の密度から予測される程には行われておらず、デザイン
の多様化の要求にも十分答えられていないのが現状であ
る。[0003] However, pure titanium is compared with nickel silver (Cu-Ni-Zn alloy) which is currently most frequently used on the watch side.
The hardness after 60% processing is as low as 230 (Hv), the weight reduction has not been performed as expected from its density, and the demand for diversification of design has not been sufficiently answered. It is the current situation.
【０００４】このため、さらに高強度化を目的としてチ
タン合金による試作が行われているが、断面減少率70％
以上の冷間加工を中間焼鈍を行わずに可能とする合金は
既存合金では見い出されてなかった。[0004] For this reason, a trial production using a titanium alloy has been carried out for the purpose of further increasing the strength, but the area reduction rate is 70%.
An alloy that enables the above cold working without performing intermediate annealing has not been found in existing alloys.
【０００５】TITANIUM'80 VOL.2,1147〜1154にはジルコ
ニウムを8.31％ (原子) 以下含有し、さらに不純物とし
て酸素560 ppm(重量) 、窒素26ppm(重量) 含有するTi−
Zr合金について強度向上効果を明らかにしている。しか
し、冷間加工性については何ら明らかにすることがな
い。[0005] TITANIUM '80 VOL.2, 1147 to 1154 contains not more than 8.31% (atomic) of zirconium, and Ti-containing 560 ppm (by weight) of oxygen and 26 ppm (by weight) of nitrogen as impurities.
The strength improvement effect of Zr alloy is clarified. However, it does not disclose cold workability.
【０００６】また、時計側等の製造には上述のようにろ
う付けが多用されており、チタンの場合、Ti−Cu−Niあ
るいはAg−Mnがろう材として使用されており、接合時に
は920 〜980 ℃に短時間昇温するので、母材であるチタ
ンが軟化する。純チタンは特にこの軟化後の硬さ (以
下、「軟化後硬さ」ということもある) が低く、この点
からも軟化後硬さの高いチタン合金の要求があった。As described above, brazing is often used in the manufacture of watches and the like. In the case of titanium, Ti-Cu-Ni or Ag-Mn is used as the brazing material, and when joining, the 920- Since the temperature rises to 980 ° C for a short time, the base material titanium softens. Pure titanium has a particularly low hardness after softening (hereinafter sometimes referred to as “hardness after softening”), and from this point as well, there is a demand for a titanium alloy having a high hardness after softening.
【０００７】[0007]
【発明が解決しようとする課題】本発明の１つの目的
は、冷間加工性を改善したチタン合金を提供することで
ある。本発明の別の目的は、冷間加工性が改善されると
ともに軟化後硬さの高いチタン合金を提供することであ
る。SUMMARY OF THE INVENTION One object of the present invention is to provide a titanium alloy with improved cold workability. Another object of the present invention is to provide a titanium alloy having improved cold workability and high hardness after softening.
【０００８】[0008]
【課題を解決するための手段】本発明者らは、上述の問
題点を解決するため、Ti−Zr系合金に着目し、それにつ
いて広範な研究を行った結果、その合金組成を規制する
ことにより製造時における冷間加工性および軟化後硬さ
を改善し、軽量化の目的を十分に達成することができる
ことを知り、本発明を完成した。Means for Solving the Problems In order to solve the above-mentioned problems, the present inventors focused on Ti-Zr-based alloys and conducted extensive research on them, and as a result, restricted the alloy composition. Thus, it was found that the cold workability during production and the hardness after softening can be improved and the object of weight reduction can be sufficiently achieved, and the present invention was completed.
【０００９】よって、本発明の要旨とするところは、Zr
≧1.0 重量％、かつZr＋25×O2≧５および３×Zr＋220
×O2≦66の条件を満たす量のジルコニウムおよび酸素、
さらに所望により、アルミニウム、スズ、鉄、銅および
クロムの１種または２種以上、合計で１重量％以下、残
部チタンと不可避不純物より成る組成を有することを特
徴とする冷間加工性に優れたチタン合金である。Therefore, the gist of the present invention is that Zr
≧ 1.0% by weight and Zr + 25 × O 2 ≧ 5 and 3 × Zr + 220
An amount of zirconium and oxygen satisfying the condition of × O 2 ≦ 66,
Further, if desired, one or more of aluminum, tin, iron, copper and chromium, a total of 1% by weight or less, having a composition comprising a balance of titanium and inevitable impurities is excellent in cold workability. It is a titanium alloy.
【００１０】より一般的には、本発明の要旨とするとこ
ろは、酸素を不純物量含有するとともにZrを重量％で５
〜22％を含み、必要によりアルミニウム、スズ、鉄、銅
およびクロムの１種以上を合計で１重量％以下、残部チ
タンと不可避不純物よりなる組成を有することを特徴と
する冷間加工性に優れたチタン合金である。ここに、
「冷間加工」は、スエージング加工、異型圧延加工、プ
レス加工等、冷間での加工一般を包含する。More generally, the gist of the present invention is that oxygen is contained as an impurity and Zr is 5% by weight.
Excellent cold workability, characterized by having a composition of at least 1% by weight of at least one of aluminum, tin, iron, copper and chromium, if necessary, with the balance being titanium and unavoidable impurities. Titanium alloy. here,
"Cold working" includes general cold working such as swaging, profile rolling and pressing.
【００１１】[0011]
【作用】次に、本発明において合金組成を上述のように
制限した理由について述べる。ジルコニウムは、単独添
加の場合は冷間加工後の硬さを確保するために５％以上
添加する必要があり、22％を越えると冷間加工性が乏し
くなる。酸素を添加する場合は、酸素により冷間加工後
の硬さが向上するのでジルコニウムは５％未満であって
もよいが、酸素は冷間加工性を阻害する元素でもあるの
で多量の添加ができなくZrは１％以上添加する必要があ
る。また、ジルコニウムはチタンに全率で固溶する合金
元素であり、１重量％以上添加することにより、ろう付
け時の昇温による軟化の程度を小さくすることができ
る。このためジルコニウム含有量の下限は１重量％に限
定される。Next, the reason for limiting the alloy composition in the present invention as described above will be described. When zirconium is added alone, it must be added in an amount of 5% or more in order to secure hardness after cold working. If it exceeds 22%, cold workability becomes poor. When oxygen is added, zirconium may be less than 5% because the hardness after cold working is improved by oxygen, but a large amount can be added because oxygen is also an element that inhibits cold workability. Zr must be added at 1% or more. Zirconium is an alloy element that forms a solid solution with titanium at a total rate. By adding 1% by weight or more, the degree of softening due to an increase in temperature during brazing can be reduced. Therefore, the lower limit of the zirconium content is limited to 1% by weight.
【００１２】ジルコニウムおよび酸素はいずれもチタン
中に固溶し、その硬さを著しく上昇させる作用を有す
る。本発明の目的である、Hv 270よりも高い冷間加工後
硬さを得るための下限として、研究の結果、Zr＋25×O2
≧５ (Zr、O2はいずれも重量％) を満足する組成が必要
であることが判明した。このため、ZrおよびO2の含有量
の下限はZr＋25×O2≧５を満足する範囲に限定される。[0012] Both zirconium and oxygen form a solid solution in titanium and have the effect of significantly increasing the hardness. As a lower limit for obtaining the post-cold working hardness higher than Hv 270, which is the object of the present invention, as a result of the research, Zr + 25 × O 2
It has been found that a composition satisfying ≧ 5 (Zr and O 2 are both weight%) is required. For this reason, the lower limits of the contents of Zr and O 2 are limited to a range satisfying Zr + 25 × O 2 ≧ 5.
【００１３】一方、ジルコニウムおよび酸素を必要以上
に多量にチタン中に添加した場合、冷間加工性を阻害
し、断面減少率70％以上の冷間加工が中間焼鈍なしでは
行えない。本発明者らの研究の結果、このような冷間加
工のための限界は３×Zr＋220×O2≦66 (Zr、O2はいず
れも重量％) であることが判明した。このため、本発明
においては、ZrおよびO2の含有量の上限は、３×Zr＋22
0 ×O2≦66に限定される。On the other hand, when zirconium and oxygen are added to titanium in an unnecessarily large amount, cold workability is impaired, and cold work with a cross-sectional reduction rate of 70% or more cannot be performed without intermediate annealing. As a result of the study of the present inventors, it has been found that the limit for such cold working is 3 × Zr + 220 × O 2 ≦ 66 (Zr and O 2 are both weight%). Therefore, in the present invention, the upper limits of the contents of Zr and O 2 are 3 × Zr + 22.
It is limited to 0 × O 2 ≦ 66.
【００１４】さらに、本発明の別の態様によれば、アル
ミニウム、スズ、鉄、銅、クロムの各添加元素を少なく
とも１種添加するが、それらはチタン中に固溶してその
硬度を上昇させる効果を持つ有効な添加元素である。し
かし、上述の組成のチタン合金にこれらの添加元素を１
種または２種以上添加する場合、その添加量の合計が１
重量％超となると、得られるTi合金の冷間加工性を悪化
させ、断面減少率70％以上の冷間加工が行えなくなる。
このため、アルミニウム、スズ、鉄、クロムの各元素を
１種または２種以上含有する場合、その合計量は１重量
％以下に限定される。Further, according to another aspect of the present invention, at least one additive element of aluminum, tin, iron, copper and chromium is added, and they are solid-solved in titanium to increase the hardness thereof. It is an effective additive element that has an effect. However, the addition of these additional elements to the titanium alloy of the above composition
When two or more species are added, the total
If the content exceeds 50% by weight, the cold workability of the obtained Ti alloy deteriorates, and the cold work with a cross-section reduction rate of 70% or more cannot be performed.
Therefore, when one or more of the elements of aluminum, tin, iron, and chromium are contained, the total amount is limited to 1% by weight or less.
【００１５】ここに、図２は本発明において利用する酸
素を添加したチタン合金の場合の組成範囲を示すグラフ
であり、斜線部が本発明の範囲内のものである。酸素は
不純物として通常0.04〜0.06％程度混入している。FIG. 2 is a graph showing the composition range in the case of the titanium alloy to which oxygen is added used in the present invention, and the hatched portion is within the range of the present invention. Oxygen is usually mixed as an impurity by about 0.04 to 0.06%.
【００１６】次に、実施例によって本発明をさらに詳述
する。実施例としては各種チタン合金に冷間加工、ろう
付けを行い、そのときの材料特性を評価した。Next, the present invention will be described in more detail by way of examples. As an example, various titanium alloys were subjected to cold working and brazing, and the material properties at that time were evaluated.
【００１７】[0017]
【実施例】表１に合金組成を示す各種チタン合金の15kg
w インゴットを溶製し、1100℃加熱でβ鍛造を行った
後、850 ℃に加熱してα＋β鍛造を行い直径９mmの線材
とした。得られた熱間圧延材に冷間鍛造であるスエージ
ング加工により断面減少率71％となる冷間加工を中間焼
鈍なしで行い直径4.9 mmの冷間加工材を得た。[Example] 15 kg of various titanium alloys whose alloy compositions are shown in Table 1
w Ingots were melted, β forged by heating at 1100 ° C, and then α + β forged by heating at 850 ° C to obtain a wire with a diameter of 9 mm. The obtained hot-rolled material was subjected to a cold working of a cross-sectional reduction rate of 71% by a swaging process as a cold forging without intermediate annealing to obtain a cold-worked material having a diameter of 4.9 mm.
【００１８】同じく表１にそのときの加工試験結果およ
び冷間加工後の硬さを示す。表１における合金No.1〜15
はいずれも本発明の範囲内にある組成を有する合金であ
り、冷間加工性は満足のゆくものであり、加工後の硬さ
の目標値であるHv 270以上の硬さをも満足した。Table 1 also shows the results of the working test and the hardness after cold working at that time. Alloy Nos. 1 to 15 in Table 1
Are alloys having compositions within the range of the present invention, and have satisfactory cold workability and a hardness of Hv 270 or more, which is the target value of hardness after working.
【００１９】一方、合金No.16 の純チタン (JIS ３種相
当) では冷間加工性は十分であるが加工後の硬さが目標
値に達しない。またZr：2.0 重量％、酸素0.10重量％
(Zr＋25×O2＝4.5)の合金No.17 の合金も加工後の硬さ
がHv＝270 に達しなかった。On the other hand, pure titanium (corresponding to JIS class 3) of alloy No. 16 has sufficient cold workability, but the hardness after working does not reach the target value. Zr: 2.0% by weight, oxygen 0.10% by weight
The hardness of alloy No. 17 (Zr + 25 × O 2 = 4.5) did not reach Hv = 270 after processing.
【００２０】また、合金No.18 〜20に示した３×Zr＋22
×O2が66を越える合金では冷間加工試験で割れが発生し
た。Further, 3 × Zr + 22 shown in Alloy Nos. 18 to 20
Alloys with × O 2 exceeding 66 cracked in the cold working test.
【００２１】さらに合金No.21 〜28に示したアルミニウ
ム、スズ、鉄、銅、クロムの各元素を１種または２種以
上含有し、その合計含有量が１重量％を超える合金では
３×Zr＋220 ×O2の値が66以下となっているにかかわら
ず、冷間加工試験で割れが発生した。Further, for alloys containing one or more of the elements of aluminum, tin, iron, copper, and chromium shown in Alloy Nos. 21 to 28, and having a total content exceeding 1% by weight, 3 × Zr + 220 Despite the value of × O 2 being 66 or less, cracks occurred in the cold working test.
【００２２】表２には表１の合金No.1、３、７、15の合
金について銀ろう付け試験を行ったときのろう付けのた
めの昇温前後950 ℃の硬さを純チタンと比較して示す。
純チタンが著しく軟化するのに対し本発明に係るチタン
合金では軟化の程度が小さいのが分かる。なお、銀ろう
付けは良好に行われ、十分なろう付け強度を有してい
た。Table 2 shows the hardness of alloys No. 1, 3, 7, and 15 in Table 1 at 950 ° C. before and after temperature rise for brazing when performing a silver brazing test with pure titanium. Shown.
It can be seen that pure titanium is significantly softened, whereas the titanium alloy according to the present invention has a small degree of softening. In addition, silver brazing was performed favorably and had sufficient brazing strength.
【００２３】[0023]
【表１】 [Table 1]
【００２４】[0024]
【表２】 [Table 2]
【００２５】[0025]
【発明の効果】以上、詳述したように、本発明により、
中間焼鈍を行わずに、スエージングおよびその後のプレ
ス加工により、現行の純チタンと比較してより加工後の
硬さが高くなり、その軽量化の結果からも斯界における
本発明の寄与は大きい。As described above in detail, according to the present invention,
By performing swaging and subsequent press working without performing intermediate annealing, the hardness after working becomes higher than that of the current pure titanium, and the contribution of the present invention in the field is large also from the result of weight reduction.
【図１】本発明に係るチタン合金の組成範囲を示すグラ
フである。FIG. 1 is a graph showing a composition range of a titanium alloy according to the present invention.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 市橋 弘行 尼崎市西長洲本通１丁目３番地 住友金属 工業株式会社中央技術研究所内 (72)発明者 杉本 由仁 尼崎市西長洲本通１丁目３番地 住友金属 工業株式会社中央技術研究所内 (72)発明者 高 昌樹 東京都豊島区池袋本町３丁目34番16号 株 式会社三洋特殊合金内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hiroyuki Ichihashi 1-3 Chome Nishi-Nagasumoto-dori, Amagasaki City Sumitomo Metal Industries, Ltd. Central Research Institute (72) Yuhi Sugimoto 1-3 chome Nishi-Naga-sumoto-dori, Amagasaki City Sumitomo Metal Industries, Ltd., Central Research Laboratory (72) Inventor, Masaki Taka, 3-34-16 Ikebukurohonmachi, Toshima-ku, Tokyo Sanyo Special Alloy Co., Ltd.
Claims (2)
よび３×Zr＋220 ×O2≦66の条件を満たす量のジルコニ
ウムおよび酸素、残部チタンと不可避不純物より成る組
成を有することを特徴とする冷間加工性にすぐれたチタ
ン合金。1. A composition comprising zirconium and oxygen in an amount satisfying the conditions of Zr ≧ 1.0% by weight and Zr + 25 × O 2 ≧ 5 and 3 × Zr + 220 × O 2 ≦ 66, the balance being titanium and inevitable impurities. Titanium alloy with excellent cold workability.
よび３×Zr＋220 ×O2≦66の条件を満たす量のジルコニ
ウムおよび酸素、ならびにアルミニウム、スズ、鉄、銅
およびクロムの１種または２種以上、合計１重量％以
下、残部チタンと不可避不純物より成る組成を有するこ
とを特徴とする冷間加工性に優れたチタン合金。2. An amount of zirconium and oxygen satisfying the conditions of Zr ≧ 1.0% by weight and Zr + 25 × O 2 ≧ 5 and 3 × Zr + 220 × O 2 ≦ 66, and one of aluminum, tin, iron, copper and chromium Or a titanium alloy excellent in cold workability, characterized in that it has a composition comprising at least two elements, a total of 1% by weight or less, and a balance of titanium and unavoidable impurities.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14308295A JP2616491B2 (en) | 1995-06-09 | 1995-06-09 | Titanium alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14308295A JP2616491B2 (en) | 1995-06-09 | 1995-06-09 | Titanium alloy |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22845885A Division JPH0646269B2 (en) | 1985-10-14 | 1985-10-14 | Glass frame made of Ti alloy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08165533A true JPH08165533A (en) | 1996-06-25 |
| JP2616491B2 JP2616491B2 (en) | 1997-06-04 |
Family
ID=15330502
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14308295A Expired - Lifetime JP2616491B2 (en) | 1995-06-09 | 1995-06-09 | Titanium alloy |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2616491B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005240169A (en) * | 2004-01-27 | 2005-09-08 | Sota Japan Kk | Titanium alloy, its production method and accessory |
| EP2333130A1 (en) * | 2004-03-19 | 2011-06-15 | Nippon Steel Corporation | Heat resistant titanium alloy sheet excellent in cold workability and a method of production of the same |
| CN117205375A (en) * | 2023-09-15 | 2023-12-12 | 宝鸡鑫诺特材股份有限公司 | A kind of titanium-zirconium alloy wire material specially used for oral implants and its preparation method |
-
1995
- 1995-06-09 JP JP14308295A patent/JP2616491B2/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005240169A (en) * | 2004-01-27 | 2005-09-08 | Sota Japan Kk | Titanium alloy, its production method and accessory |
| EP2333130A1 (en) * | 2004-03-19 | 2011-06-15 | Nippon Steel Corporation | Heat resistant titanium alloy sheet excellent in cold workability and a method of production of the same |
| US9797029B2 (en) | 2004-03-19 | 2017-10-24 | Nippon Steel & Sumitomo Metal Corporation | Heat resistant titanium alloy sheet excellent in cold workability and a method of production of the same |
| CN117205375A (en) * | 2023-09-15 | 2023-12-12 | 宝鸡鑫诺特材股份有限公司 | A kind of titanium-zirconium alloy wire material specially used for oral implants and its preparation method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2616491B2 (en) | 1997-06-04 |
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