JP2008127667A5 - - Google Patents
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- JP2008127667A5 JP2008127667A5 JP2006316860A JP2006316860A JP2008127667A5 JP 2008127667 A5 JP2008127667 A5 JP 2008127667A5 JP 2006316860 A JP2006316860 A JP 2006316860A JP 2006316860 A JP2006316860 A JP 2006316860A JP 2008127667 A5 JP2008127667 A5 JP 2008127667A5
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- 229910001069 Ti alloy Inorganic materials 0.000 claims description 48
- 229910052732 germanium Inorganic materials 0.000 claims description 19
- 239000010936 titanium Substances 0.000 claims description 18
- 238000005034 decoration Methods 0.000 claims description 15
- 229910052804 chromium Inorganic materials 0.000 claims description 14
- 229910052803 cobalt Inorganic materials 0.000 claims description 14
- 229910052742 iron Inorganic materials 0.000 claims description 14
- 229910052720 vanadium Inorganic materials 0.000 claims description 14
- 229910052721 tungsten Inorganic materials 0.000 claims description 13
- 229910052802 copper Inorganic materials 0.000 claims description 12
- 239000012535 impurity Substances 0.000 claims description 12
- 229910052748 manganese Inorganic materials 0.000 claims description 10
- 229910052759 nickel Inorganic materials 0.000 claims description 10
- 229910052719 titanium Inorganic materials 0.000 claims description 10
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 claims description 8
- 229910052710 silicon Inorganic materials 0.000 claims description 7
- 229910052715 tantalum Inorganic materials 0.000 claims description 6
- 229910052726 zirconium Inorganic materials 0.000 claims description 4
- 229910045601 alloy Inorganic materials 0.000 description 10
- 239000000956 alloy Substances 0.000 description 10
- REDXJYDRNCIFBQ-UHFFFAOYSA-N aluminium(3+) Chemical class [Al+3] REDXJYDRNCIFBQ-UHFFFAOYSA-N 0.000 description 10
- 239000000463 material Substances 0.000 description 7
- 238000002844 melting Methods 0.000 description 7
- 230000000087 stabilizing Effects 0.000 description 7
- 238000005097 cold rolling Methods 0.000 description 6
- 230000035876 healing Effects 0.000 description 5
- RTAQQCXQSZGOHL-UHFFFAOYSA-N titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 5
- 239000000203 mixture Substances 0.000 description 4
- 238000005482 strain hardening Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 229910052750 molybdenum Inorganic materials 0.000 description 3
- 210000003491 Skin Anatomy 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000005242 forging Methods 0.000 description 2
- 238000005755 formation reaction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052718 tin Inorganic materials 0.000 description 2
- 210000002381 Plasma Anatomy 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000003466 anti-cipated Effects 0.000 description 1
- 238000010622 cold drawing Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 230000002708 enhancing Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000010929 jewellery material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000003014 reinforcing Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000000365 skull melting Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
Description
本発明は、優れた冷間加工性と装飾・装身機能を有するゲルマニウム（Ｇｅ）を含有する高強度チタン合金および該合金を用いた装飾・装身具に関する。 The present invention relates to a high-strength titanium alloy containing germanium (Ge) having excellent cold workability and a decoration / dressing function, and a decoration / jewelery using the alloy.
チタン合金からなる装飾・装身具の素材となる薄板や線材を製造する場合には、冷間圧延や冷間引き抜きなどの冷間（塑性）加工を必要とするが、多くのチタン合金は冷間加工性が悪いという欠点を有している。また、チタンまたはチタン合金にＧｅを含有させると、Ｇｅ含有量の増加に伴い強度は上昇するが、冷間加工性の指標である絞りは低下する。このことはチタン合金にＧｅを含有させることによって、冷間加工性を劣化させることを示唆するものである。
因みに、特許文献１には、１〜３０質量％のＧｅを含有させたチタン合金の試材を用いた塑性加工性（冷間加工性）確認の実施例において、冷間加工率５０％を付与した圧延で、Ｇｅ含有量１０質量％を超えると冷間圧延が困難であることが開示されている。
When manufacturing thin plates and wire rods that are used as decoration and jewelry materials made of titanium alloys, cold (plastic) processing such as cold rolling and cold drawing is required, but many titanium alloys are cold processed. It has the disadvantage of poor properties. Further, when Ge is contained in titanium or a titanium alloy, the strength increases as the Ge content increases, but the drawing, which is an index of cold workability, decreases. This suggests that the cold workability is deteriorated by including Ge in the titanium alloy.
Incidentally, Patent Document 1 gives a cold work rate of 50% in an example of confirmation of plastic workability (cold workability) using a sample of a titanium alloy containing 1 to 30% by mass of Ge. It is disclosed that cold rolling is difficult when the Ge content exceeds 10% by mass.
また、特許文献２には、その特許請求の範囲において、
請求項１に、Ｔｉ−１〜１５質量％Ｇｅ
請求項２に、Ｔｉ−２〜１５質量％Ｓｎ−１〜１５質量％Ｇｅ
請求項３に、Ｔｉ−３〜２０質量％Ｎｂ−１〜１５質量％Ｇｅ
Ｔｉ−２〜１５質量％Ｓｎ−３〜２０質量％Ｎｂ−1〜15質量％Ｇｅ
請求項４に、Ｔｉ−１〜５質量％Ｚｒ−１〜１５質量％Ｇｅ
Ｔｉ−２〜１５質量％Ｓｎ−１〜５質量％Ｚｒ−１〜１５質量％Ｇｅ
Ｔｉ−３〜２０質量％Ｎｂ−１〜５質量％Ｚｒ−１〜１５質量％Ｇｅ
Ｔｉ−２〜１５質量％Ｓｎ−３〜２０質量％Ｎｂ−１〜５質量％Ｚｒ−１ 〜１５質量％Ｇｅ
の組成からなる装身具用のチタン合金が開示されている。そして、このように１〜１５質量％のＧｅを含有させることにより、装飾機能に優れるとともに、遠赤外線にもとづく健康増進あるいは治療・治癒効果（装身機能）が期待できるとしている。
Moreover, in patent document 2, in the claim,
In claim 1, Ti-1-15 mass% Ge
In claim 2, Ti-2-15 mass% Sn-1-15 mass% Ge
In claim 3, Ti-3-20 mass% Nb-1-15 mass% Ge
Ti-2-15% by mass Sn-3-20% by mass Nb-1-15% by mass Ge
In claim 4, Ti-1 to 5 mass% Zr-1 to 15 mass% Ge
Ti-2-15 mass% Sn-1-5 mass% Zr-1-15 mass% Ge
Ti-3-20 mass% Nb-1-5 mass% Zr-1-15 mass% Ge
Ti-2 to 15% by mass Sn-3 to 20% by mass Nb-1 to 5% by mass Zr-1 to 15% by mass Ge
A titanium alloy for jewelry having the following composition is disclosed. And by containing 1-15 mass% Ge in this way, while being excellent in a decoration function, the health promotion based on a far-infrared ray, or the treatment / healing effect (trimming function) can be anticipated.
なお、たとえば、上記の装身機能を備えた従来のＧｅ含有チタン合金を用いて製作されている眼鏡フレームでは、使用中に容易に折損したり、変形を生じたりして、極めて、使い勝手がよくないという問題を抱えている。
こうした問題の解消や軽量化のために、単にチタン合金のＧｅ含有量を増して強度アップを図ろうとすれば、上述したように冷間加工性が劣化して眼鏡フレームの圧延加工が困難になる。つまり、Ｇｅ含有のチタン合金において、強度と冷間加工性という互いに相反する機械的性質を同時に向上させていくことが当面の課題として提起される。
In order to solve these problems and reduce the weight, simply increasing the Ge content of the titanium alloy to increase the strength deteriorates the cold workability and makes it difficult to roll the spectacle frame as described above. . That is, for the time being, it is proposed to simultaneously improve mutually contradicting mechanical properties such as strength and cold workability in a Ge-containing titanium alloy.
本発明は、上述した背景技術に鑑みてなされたものである。すなわちチタン合金において、強度アップおよび装飾機能と健康増進あるいは治療・治癒の機能（装身機能）を付与するために添加されたＧｅによって、冷間加工性が劣化するという課題を解消して、従来のＧｅ含有チタン合金よりも高強度で優れた冷間加工性を有し、かつ装飾・装身具に適した新規なＧｅ含有の高強度チタン合金を提供することを目的とする。 The present invention has been made in view of the background art described above. In other words, in the titanium alloy, the problem that cold workability deteriorates due to Ge added to increase strength and enhance the decorative function and health promotion or treatment / healing function (dressing function) has been solved. An object of the present invention is to provide a novel Ge-containing high-strength titanium alloy having higher strength and superior cold workability than that of the Ge-containing titanium alloy and suitable for decoration and accessories.
本発明は上記目的を達成するために為されたもので、その基本的な技術思想は、Ｇｅ添加によって冷間加工性が劣化したチタン合金にβ相形成・安定化元素を添加することによって高強度でかつ良好な冷間加工性を有するβ相からなるβ型チタン合金にすることにある。 The present invention has been made to achieve the above-mentioned object, and its basic technical idea is that it is enhanced by adding a β-phase forming / stabilizing element to a titanium alloy whose cold workability has deteriorated due to the addition of Ge. The object is to make a β-type titanium alloy composed of a β-phase having high strength and good cold workability.
請求項１記載の発明は、質量％でＮｂ２０％を超え４０％以下、Ｇｅ０.２％〜４.０％を含有し、さらに、Ｔａ、Ｗ、Ｖ、Ｃｒ、Ｎｉ、Ｍｎ、Ｃｏ、Ｆｅ、Ｃｕ、Ｓｉの１種以上を合計で１５％以下含有し、残部がＴｉおよび不可避不純物からなる冷間加工性に優れたことを特徴とするＧｅ含有の高強度チタン合金である。 The invention according to claim 1 contains Nb in excess of 20% by mass and 40% or less, Ge 0.2% to 4.0% , and Ta, W, V, Cr, Ni, Mn, Co, Fe, A Ge-containing high-strength titanium alloy characterized in that it contains one or more of Cu and Si in a total amount of 15% or less, and the balance is excellent in cold workability consisting of Ti and inevitable impurities.
請求項２記載の発明は、質量％でＮｂ２０％を超え４０％以下、Ｇｅ０.２％〜４.０％を含有し、さらに、Ｗ、Ｖ、Ｃｒ、Ｎｉ、Ｍｎ、Ｃｏ、Ｆｅ、Ｃｕの１種以上を合計で１５％以下と、Ｚｒ１０％以下とを含有し、残部がＴｉおよび不可避不純物からなる冷間加工性に優れたことを特徴とするＧｅ含有の高強度チタン合金である。 The invention according to claim 2 contains Nb in excess of 20% by mass and 40% or less, Ge 0.2% to 4.0% , and W, V, Cr, Ni, Mn, Co, Fe, Cu . It is a Ge-containing high-strength titanium alloy characterized in that it contains one or more types in a total of 15% or less and Zr 10% or less, and the balance is excellent in cold workability consisting of Ti and inevitable impurities.
請求項３記載の発明は、質量％でＮｂ２０％以下、Ｇｅ０.２％〜４.０％を含有し、さらに、Ｔａ、Ｗ、Ｖ、Ｃｒ、Ｎｉ、Ｍｎ、Ｃｏ、Ｆｅ、Ｃｕ、Ｓｉの１種以上を合計で３０％以下含有し、残部がＴｉおよび不可避不純物からなる冷間加工性に優れたことを特徴とするＧｅ含有の高強度チタン合金である。 The invention according to claim 3 contains Nb 20% or less and Ge 0.2% to 4.0% by mass%, and further includes Ta, W, V, Cr, Ni, Mn, Co, Fe, Cu, and Si. A Ge-containing high-strength titanium alloy characterized in that it contains at least 30% in total and the balance is excellent in cold workability consisting of Ti and inevitable impurities.
請求項４記載の発明は、質量％でＮｂ２０％以下、Ｇｅ０.２％〜４.０％を含有し、さらに、Ｗ、Ｖ、Ｃｒ、Ｎｉ、Ｍｎ、Ｃｏ、Ｆｅ、Ｃｕの１種以上を合計で３０％以下と、Ｚｒ１０％以下とを含有し、残部がＴｉおよび不可避不純物からなる冷間加工性に優れたことを特徴とするＧｅ含有の高強度チタン合金である。 Invention of claim 4, below NB 20% by mass%, contains Ge0.2% to 4.0%, further, W, V, Cr, Ni , Mn, Co, Fe, one or more Cu A Ge-containing high-strength titanium alloy containing 30% or less in total and 10% or less Zr and the balance being excellent in cold workability comprising Ti and inevitable impurities.
請求項５記載の発明は、質量％でＧｅ０.２％〜４.０％を含有し、さらに、Ｗ、Ｖ、Ｃｒ、Ｎｉ、Ｍｎ、Ｃｏ、Ｆｅ、Ｃｕ、Ｓｉの１種以上を合計で３０％以下含有し、残部がＴｉおよび不可避不純物からなる冷間加工性に優れたことを特徴とするＧｅ含有の高強度チタン合金ある。 The invention according to claim 5 contains 0.2% to 4.0% Ge by mass%, and further includes at least one of W, V, Cr, Ni, Mn, Co, Fe, Cu, and Si in total. A Ge-containing high-strength titanium alloy characterized by being excellent in cold workability containing 30% or less and the balance being Ti and inevitable impurities.
請求項６記載の発明は、質量％でＧｅ０.２％〜４.０％を含有し、さらにＭｏ、Ｗ、Ｖ、Ｃｒ、Ｎｉ、Ｍｎ、Ｃｏ、Ｆｅ、Ｃｕ、Ｓｉの１種以上を合計で３０％以下と、Ｚｒ、Ｓｎの１種以上を合計で１０％以下とを含有し、残部がＴｉおよび不可避不純物からなる冷間加工性に優れたことを特徴とするＧｅ含有の高強度チタン合金である。 The invention according to claim 6 contains Ge 0.2% to 4.0% by mass, and further includes at least one of Mo , W, V, Cr, Ni, Mn, Co, Fe, Cu, and Si. High-strength titanium containing Ge, characterized by being excellent in cold workability comprising at least 30% or less and a total of 10% or less of one or more of Zr and Sn, the balance being Ti and inevitable impurities It is an alloy.
請求項７記載の発明は、請求項１〜６記載のＧｅ含有の高強度チタン合金で構成された装飾・装身具である。 A seventh aspect of the present invention is a decoration / jewelry made of the Ge-containing high-strength titanium alloy according to the first to sixth aspects.
ここで、本発明について、さらに詳細に説明する。まず、本発明合金の組成を上記のように成分限定した理由について説明する
本発明合金において、Ｇｅの含有量が０.２質量％未満では、強度アップはほとんど期待できず、また、装飾機能と遠赤外線にもとづく健康増進あるいは治療・治癒の機能は発揮されない。一方、図１に示すようにＧｅの含有量が４.０質量％を超えると、冷間加工性の指標である絞りが急激に低下することから、冷間加工性が劣化することが想定される。したがって、Ｇｅの含有量を０.２〜４.０質量％に限定した。
Here, the present invention will be described in more detail. First, the reason why the composition of the alloy of the present invention is limited as described above will be described. In the alloy of the present invention, if the Ge content is less than 0.2% by mass, almost no increase in strength can be expected. The function of health promotion or treatment / healing based on far-infrared rays is not exhibited. On the other hand, as shown in FIG. 1, when the Ge content exceeds 4.0% by mass, the drawing, which is an index of cold workability, rapidly decreases, and it is assumed that cold workability deteriorates. The Therefore, the content of Ge is limited to 0.2 to 4.0% by mass.
Ｔｉに４０質量％を超えてＮｂを添加すると、両元素の比重、融点などの相違により溶解に難点を生じ、成分組成の均一な鋳塊が極めて得難いことから本発明のチタン合金の
Ｎｂ含有量の上限を４０質量％とした。なお、Ｎｂ自体、β相形成・安定化元素であって、チタンあるいはチタン合金へのＮｂ含有量が増すに伴い、より安定なβ相からなるβ型チタン合金を得ることができる。しかし、Ｎｂは極めて高価な合金元素であることから本発明では、Ｎｂに代替するβ相形成・安定化元素としてＭｏ、Ｔａ、Ｗ、Ｖ、Ｃｒ、Ｎｉ、Ｍｎ、Ｃｏ、Ｆｅ、Ｃｕ、Ｓｉなどを選定し、上記のようにこれらの合金元素を組み合わせ、適量含有させることによって、冷間加工性にすぐれたＧｅ含有の高強度β型チタン合金を得ようとするものである。
If Nb is added in excess of 40% by mass to Ti, it will be difficult to dissolve due to differences in specific gravity, melting point, etc. of both elements, and it will be extremely difficult to obtain an ingot with a uniform composition. The upper limit of 40 mass%. Nb itself is a β-phase forming / stabilizing element, and a β-type titanium alloy composed of a more stable β-phase can be obtained as the Nb content in titanium or titanium alloy increases. However, since Nb is an extremely expensive alloy element, Mo, Ta, W, V, Cr, Ni, Mn, Co, Fe, Cu, Si are used as β-phase forming / stabilizing elements instead of Nb in the present invention. By combining these alloying elements as described above and containing them in appropriate amounts, a Ge-containing high-strength β-type titanium alloy excellent in cold workability is obtained.
具体的には、Ｎｂ含有量が４０質量％以下で本発明のチタン合金の組織をより安定なβ相とするためには、２０質量％＜Ｎｂ含有量≦４０質量％の範囲では、β相形成・安定化元素であるＭｏ、Ｔａ、Ｗ、Ｖ、Ｃｒ、Ｎｉ、Ｍｎ、Ｃｏ、Ｆｅ、Ｃｕ、Ｓｉを単味または複合で、１５質量％以下含有させる必要がある。またＮｂ含有量が０〜２０質量％の範囲では、前記β相形成・安定化元素を単味または複合で３０質量％以下含有させる必要がある。さらに好ましくは、Ｎｂ含有量０〜４０質量％の全範囲において、β相形成・安定化元素の機能を示す指標であるモリブデン当量(Ｍｏｅｑ＝Ｍｏ＋Ｎｂ/３.５＋Ｔａ／５＋Ｖ／１.５＋１.２５Ｃｒ＋１.２５Ｎｉ＋１.７Ｍｎ＋１.７Ｃｏ＋２.５Ｆｅ)を９質量％以上とすることが望ましい。
さらに、必要に応じて、マトリックス強化元素であるＺｒ、Ａｌ、Ｓｎを単味または複合で含有させることにより、素地が強化され高強度化を図ることができる。しかし、これら成分を単味または複合で１０質量％を超えて含有させると延性が低下して、冷間加工性も劣化することから１０質量％をその上限とした。
Specifically, in order to make the structure of the titanium alloy of the present invention having a Nb content of 40% by mass or less and a more stable β phase, in the range of 20% by mass <Nb content ≦ 40% by mass, the β phase The formation / stabilizing elements Mo, Ta, W, V, Cr, Ni, Mn, Co, Fe, Cu, and Si need to be contained in an amount of 15% by mass or less in a simple or composite manner. When the Nb content is in the range of 0 to 20% by mass, the β-phase forming / stabilizing element needs to be contained in an amount of 30% by mass or less in a simple or complex manner. More preferably, the molybdenum equivalent (Moeq = Mo + Nb / 3.5 + Ta / 5 + V / 1.5 + 1.25Cr + 1.5) which is an index indicating the function of the β-phase formation / stabilizing element in the entire range of Nb content of 0 to 40% by mass. 25Ni + 1.7Mn + 1.7Co + 2.5Fe) is preferably 9 mass% or more .
Furthermore, by adding Zr, Al, and Sn, which are matrix reinforcing elements, as simple or complex as required, the substrate is strengthened and high strength can be achieved. However, if these components are contained in a simple or composite amount exceeding 10% by mass, the ductility decreases and the cold workability deteriorates, so 10% by mass was made the upper limit.
本発明によれば、チタン合金にＧｅを含有させることによって、強度アップによる本発明合金からなる製品の軽量化が図られるとともに装飾機能と健康増進あるいは治療・治癒の機能（装身機能）が付与され、さらに、β相形成・安定化元素を含有させてβ型チタン合金とすることによって、冷間加工性が改善されるため、装飾・装身具に適し、かつ優れた冷間加工性を有するＧｅ含有の高強度β型チタン合金を提供することが可能となる。 According to the present invention, by including Ge in the titanium alloy, the weight of the product made of the alloy of the present invention can be reduced by increasing the strength, and the decorative function and the health promotion or treatment / healing function can be provided. In addition, since the β-type titanium alloy containing a β-phase forming / stabilizing element improves the cold workability, Ge is suitable for decoration and accessories and has excellent cold workability. It becomes possible to provide a high-strength β-type titanium alloy.
ついで、本発明合金の製造方法について説明する。
まず、本発明のチタン合金に限らず、純チタンあるいはチタン合金は、真空高周波溶解炉、真空プラズマ溶解炉、電子ビーム溶解炉（ＥＢ炉）、真空アーク溶解炉（ＶＡ炉）、スカル溶解炉などにより溶解され、所望の合金組成に成分調整した後、鋳塊（インゴット）とする。必要に応じて、このインゴットに溶体化処理を施して内部組織の均一化を図る。
ついで、熱間加工により、所望形状のビレットとする。さらに、このビレットを熱間加工あるいは冷間加工により、板材や線材に成形して、装飾・装身具などの素材として提供される。たとえば、図２に示すような眼鏡フレーム１を製作する場合、前記線材を用いて眼鏡フレーム１を構成するリム２、ブリッジ３およびテンプル４が冷間加工によって最終形状に成形される。
Subsequently, the manufacturing method of this invention alloy is demonstrated.
First, not limited to the titanium alloy of the present invention, pure titanium or titanium alloy may be a vacuum high-frequency melting furnace, a vacuum plasma melting furnace, an electron beam melting furnace (EB furnace), a vacuum arc melting furnace (VA furnace), a skull melting furnace, etc. Then, the components are adjusted to a desired alloy composition, and then an ingot is formed. If necessary, the ingot is subjected to a solution treatment to make the internal structure uniform.
Next, a billet having a desired shape is obtained by hot working. Furthermore, the billet is formed into a plate material or wire by hot working or cold working, and provided as a material for decorations and accessories. For example, when the spectacle frame 1 as shown in FIG. 2 is manufactured, the rim 2, the bridge 3 and the temple 4 constituting the spectacle frame 1 are formed into a final shape by cold working using the wire rod.
本発明合金の装飾・装身機能について詳述するならば、本発明のチタン合金にＧｅを含有させることにより、その地肌の色調である白色の鮮やかさが一段と増すといった装飾機能が発揮されるとともに、半導体元素であるＧｅから放射される遠赤外線の人体への熱作用と非熱作用により、本発明合金に接触することで、健康増進あるいは治癒の効果がもたらされるといった装身機能が発揮される。 If the details of the decoration and decoration function of the alloy of the present invention are described, by adding Ge to the titanium alloy of the present invention, the decoration function that the vividness of the white color of the background is further enhanced is exhibited. In addition, the thermal function and the non-thermal action of the far-infrared radiation emitted from the semiconductor element Ge exerts a body-building function such as bringing about health promotion or healing effect by contacting the alloy of the present invention. .
したがって、本発明のＧｅ含有の高強度チタン合金で構成される装飾・装身具としては、使用者の肌に常時接触して用いられるものであることが望ましく、たとえば、ネックレス、
ネックチェーン、ペンダンット、アンクレット、イヤリング、ピアスなどの装飾・装身具；時計側ケース、時計裏蓋、バンド駒、バックルなどの腕時計外装部品；眼鏡フレーム等々が挙げられる。好ましくは、これらの中でも、過酷な冷間加工の伴う眼鏡フレーム、腕時計外装部品に本発明のＧｅ含有の高強度チタン合金を適用することが望ましい。
なお、本発明のチタン合金の用途としては、上記のような装飾・装身具に限定されるものではなく、たとえば、Ｇｅを含有する本発明のチタン合金は、従来のチタン合金よりも高い強度（硬度）と延性を有することからゴルフクラブのヘッドなどにも利用可能である。
Therefore, it is desirable that the decoration / jewelry made of the Ge-containing high-strength titanium alloy of the present invention is used in constant contact with the user's skin, for example, a necklace,
Examples include ornaments and accessories such as neck chains, pendants, anklets, earrings, and earrings; watch exterior parts such as watch cases, watch case covers, band pieces, and buckles; and eyeglass frames. Preferably, among these, it is desirable to apply the Ge-containing high-strength titanium alloy of the present invention to a spectacle frame and a wristwatch exterior part accompanied by severe cold working.
The use of the titanium alloy of the present invention is not limited to the decoration / jewelry as described above. For example, the titanium alloy of the present invention containing Ge has higher strength (hardness) than conventional titanium alloys. ) And ductility, it can also be used for golf club heads.
（実施例１）
Ｔｉ−２８Ｎｂ−４ＦｅのＧｅ含有量を変えた本発明のチタン合金（請求項２相当材）と純チタンのＧｅ含有量を変えた比較材を３０ｍｍφインゴットにそれぞれ真空アーク溶解炉を用いて溶製し、これらのインゴットを熱間鍛造後スェージング加工にて３ｍｍφの丸棒に成形し、引き続き溶体化処理を施した後、引張り試験に供試した。これらの引張り試験結果を図１に図示する。同図から明らかなように、本発明のチタン合金は、いずれのＧｅ含有量においても比較材より高強度・高延性である。しかし、Ｇｅ含有量が４質量％を超えると本発明のチタン合金の絞り（延性）が急激に低下していることから、同様に冷間加工性も劣化することが想定される。
(Example 1)
The titanium alloy of the present invention (material equivalent to claim 2) in which the Ge content of Ti-28Nb-4Fe was changed and the comparative material in which the Ge content of pure titanium was changed were made into 30 mmφ ingots using a vacuum arc melting furnace. These ingots were formed into 3 mmφ round bars by swaging after hot forging and subsequently subjected to solution treatment, and then subjected to a tensile test. The results of these tensile tests are illustrated in FIG. As is clear from the figure, the titanium alloy of the present invention has higher strength and higher ductility than the comparative material at any Ge content. However, when the Ge content exceeds 4% by mass, the drawing (ductility) of the titanium alloy of the present invention is drastically reduced, so that it is assumed that the cold workability is similarly deteriorated.
（実施例２）
表１に示す９種類の本発明のチタン合金と３種類（Ｎｏ．２３〜Ｎｏ．２５）のチタン合金からなる比較材を３０ｍｍφインゴットにそれぞれ真空アーク溶解炉を用いて溶製し、これ等のインゴットを熱間鍛造して１８ｍｍφの丸棒に成形した。その一部を機削りして１５ｍｍφのテストピースとし、引き続き溶体化処理を施した後、冷間圧延テストに供試した。供試された１５ｍｍφのテストピースにＶ溝冷間圧延機を用いて加工率７８％の冷間加工を付加して７ｍｍ×７ｍｍ断面に圧延加工した後、冷間圧延加工後の表面肌の状態と割れ発生の有無を確認した。そのテスト結果は表１に示すように、本発明材にはいずれも割れの発生は認められず、良好な表面肌を呈していた。
(Example 2)
Comparative materials made of nine types of titanium alloys of the present invention and three types (No. 23 to No. 25) shown in Table 1 were melted in 30 mmφ ingots using a vacuum arc melting furnace. The ingot was hot forged and formed into a 18 mmφ round bar. A part thereof was machined to obtain a 15 mmφ test piece, which was subsequently subjected to a solution treatment and then subjected to a cold rolling test. After rolling to 7 mm × 7 mm cross section by adding a cold working processing rate of 78% using V-groove cold rolling mill in the test piece of the test have been having a diameter of 15 mm, the surface texture after cold rolling condition The presence or absence of cracks was confirmed. As a result of the test, as shown in Table 1, no cracking was observed in the material of the present invention, and a good surface skin was exhibited.
（実施例３）
実施例２に供試したＮｏ．７の本発明のチタン合金を用いて、図２示す眼鏡フレーム１の構成部材であるリム（線）２、ブリッジ３、テンプル４を試作した。
実施例２で熱間鍛造によって鍛伸成形された１８ｍｍφ丸棒を一部流用し、これら１８ｍｍφ丸棒に冷間スェージング加工を施して３ｍｍφのコイルに加工し、さらに、これらコイルの一部にプレス加工を付加してブリッジ３またはテンプル４に成形した。また、残りの前記３ｍｍφのコイルをＶ溝冷間圧延機によって図３に示す断面形状のＶ溝リム線２に成形した。試作品は、いずれも精度よく成形加工され、良好な地肌を呈していた。
(Example 3)
No. 2 used in Example 2 . A rim (wire) 2, a bridge 3, and a temple 4 which are constituent members of the spectacle frame 1 shown in FIG.
A part of the 18 mmφ round bars forged and formed by hot forging in Example 2 was used, and the 18 mmφ round bars were subjected to cold swaging to be processed into 3 mmφ coils, and a press was applied to some of these coils. Processing was added to form the bridge 3 or the temple 4. The remaining 3 mmφ coil was formed into a V-groove rim wire 2 having a cross-sectional shape shown in FIG. 3 by a V-groove cold rolling mill. All of the prototypes were molded with high accuracy and exhibited a good background.
（実施例４）
実施例３と同様にして、実施例２に供試したＮｏ．７の本発明チタン合金の１８ｍｍφ鍛造丸棒を一部流用して、腕時計外装部品である時計側ケースを試作した。
前記１８ｍｍφ鍛造丸棒をセンタレスグラインダーにて１６ｍｍφ丸棒に加工し、これを輪切りにして６ｍｍ厚×１６ｍｍφのビレットを製作した。ついで、このビレットを冷間プレスにて所定形状に成形後、切削および研磨による仕上げ加工を施して所望の時計側ケースを試作した。試作品はいずれも軽く、しかも鮮やかな白色の色調を呈し、優れた装飾・装身機能を発揮していた。
Example 4
In the same manner as in Example 3, the No. 2 used in Example 2 was tested . A watch-side case, which is a wristwatch exterior part, was prototyped by diverting a portion of No. 7 18-mmφ forged round bar of the titanium alloy of the present invention.
The 18 mmφ forged round bar was processed into a 16 mmφ round bar with a centerless grinder, and this was cut into a 6 mm thick × 16 mmφ billet. Next, the billet was formed into a predetermined shape by a cold press, and then finished by cutting and polishing to produce a desired watch side case. All of the prototypes were light and had a vibrant white color, and exhibited an excellent decoration and decoration function.
１ 眼鏡フレーム
２ リム
３ ブリッジ
４ テンプル
1 eyeglass frame 2 rim 3 bridge 4 temple
Claims (7)
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| JP2006316860A JP2008127667A (en) | 2006-11-24 | 2006-11-24 | Germanium-containing high strength titanium alloy having excellent cold workability, and ornament or accessory made of the alloy |
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| JP2006316860A JP2008127667A (en) | 2006-11-24 | 2006-11-24 | Germanium-containing high strength titanium alloy having excellent cold workability, and ornament or accessory made of the alloy |
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| JP2008127667A JP2008127667A (en) | 2008-06-05 |
| JP2008127667A5 true JP2008127667A5 (en) | 2008-10-09 |
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