JP2004353053A - Titanium based amorphous alloy - Google Patents
Titanium based amorphous alloy Download PDFInfo
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- JP2004353053A JP2004353053A JP2003153650A JP2003153650A JP2004353053A JP 2004353053 A JP2004353053 A JP 2004353053A JP 2003153650 A JP2003153650 A JP 2003153650A JP 2003153650 A JP2003153650 A JP 2003153650A JP 2004353053 A JP2004353053 A JP 2004353053A
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- amorphous alloy
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- based amorphous
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- 229910000808 amorphous metal alloy Inorganic materials 0.000 title claims abstract description 51
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 title claims abstract description 37
- 239000010936 titanium Substances 0.000 title claims abstract description 37
- 229910052719 titanium Inorganic materials 0.000 title claims abstract description 37
- 239000007789 gas Substances 0.000 claims abstract description 16
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 15
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000012535 impurity Substances 0.000 claims abstract description 14
- 239000001301 oxygen Substances 0.000 claims abstract description 14
- 238000005260 corrosion Methods 0.000 abstract description 10
- 230000007797 corrosion Effects 0.000 abstract description 10
- 239000000463 material Substances 0.000 abstract description 6
- 239000012770 industrial material Substances 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract description 2
- 230000002708 enhancing effect Effects 0.000 abstract 1
- 229910045601 alloy Inorganic materials 0.000 description 14
- 239000000956 alloy Substances 0.000 description 14
- 239000013526 supercooled liquid Substances 0.000 description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 7
- 239000010949 copper Substances 0.000 description 7
- 229910052802 copper Inorganic materials 0.000 description 7
- 229910018054 Ni-Cu Inorganic materials 0.000 description 6
- 229910018481 Ni—Cu Inorganic materials 0.000 description 6
- 239000012300 argon atmosphere Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 239000010453 quartz Substances 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229910001069 Ti alloy Inorganic materials 0.000 description 2
- 238000005280 amorphization Methods 0.000 description 2
- 239000005300 metallic glass Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000007712 rapid solidification Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 229910017985 Cu—Zr Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000008204 material by function Substances 0.000 description 1
- 239000012567 medical material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
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- Materials For Medical Uses (AREA)
Abstract
Description
【０００１】
【発明の属する技術分野】
本発明は、優れた耐食性、強度及び加工性を有するチタン基非晶質合金に関する。
【０００２】
【従来の技術】
一般に、アモルファス金属（金属ガラス）を製造する場合、結晶化を抑制するために溶融状態から一挙に凝固させる方法が採られている。良く知られた方法として、大きな冷却速度が得られる双ロール法、片ロール法等がある。
金属又は合金の種類によって、アモルファス化し易いものとそうでないないものがあるが、このような中で、特にチタン合金は非晶質形成能が小さいために、１ｍｍ程度の線しか作製できないという問題がある。
【０００３】
一方、チタン基非晶質合金は他の非晶質材料に比べて、優れた耐食性を有し、生体への反応がなく（生体毒性がない）、高強度であるという格段に優れた特性を有している。例えばＴｉ−Ｎｉ−Ｃｕ系非晶質合金は、３０°Ｃ以上の過冷却液体領域と１０００ＭＰａを超える強度を備えている。
このような材料の特性を活かして、医用材料や化学機器等の材料に利用が検討されている。しかし、上記のように製造できる形状が著しく制限されているために、実用化できる範囲が極めて小さい。
このようなことから、チタン基非晶質合金の実用化のために、主に合金成分の組合せに力点をおいて、過冷却液体領域温度幅、製造できる形状や寸法、加工性等を向上させる工夫がなされている（例えば、特許文献１参照）。
しかし、依然として非晶質形成能が劣り、１ｍｍ程度の細線の製造しかできず、また加工性が著しく劣るという問題があった。
【０００４】
【特許文献１】
国際公開番号ＷＯ９９／４９０９５号公報
【０００５】
【発明が解決しようとする課題】
本発明は、チタン基非晶質合金の非晶質形成能と加工性を飛躍的に向上させると共に、その材料の保有する耐食性と強度を活かし、工業材料として十分適用できるチタン基非晶質合金を提供する。
【０００６】
【課題を解決するための手段】
上記の課題を解決するために、本発明者らは、チタン基非晶質合金の不純物が非晶質形成能と加工性に悪影響を与えていると考え、これを改善することにより、非晶質形成能と加工性を向上させ、かつ耐食性と強度を良好に活かすことができるとの知見を得た。
【０００７】
本発明は、上記知見に基づき、
１．酸素含有量が０．１ｗｔ％以下であることを特徴とするチタン基非晶質合金
２．酸素含有量が０．０５ｗｔ％以下であることを特徴とするチタン基非晶質合金
３．ガス成分を除く不純物含有量が１０００ｗｔｐｐｍ以下であることを特徴とする上記１又は２記載のチタン基非晶質合金
４．ガス成分含有量が１ｗｔ％以下であることを特徴とする上記１〜３のいずれかに記載のチタン基非晶質合金
５．非晶質の体積分率が８０％以上であることを特徴とする上記１〜４のいずれかに記載のチタン基非晶質合金
６．非晶質の体積分率が９０％以上であることを特徴とする上記１〜４のいずれかに記載のチタン基非晶質合金
【０００８】
【発明の実施の形態】
本発明のチタン基非晶質合金は、酸素含有量０．１ｗｔ％以下であり、好ましくは酸素含有量０．０５ｗｔ％以下である。不純物の中で酸素の量は極めて重要であり、酸素が多量に存在すると非晶質化が著しく低下する。
酸素含有量０．１ｗｔ％以下とすることにより、急冷凝固によるアモルファス化の寸法（サイズ）を大型化が可能となる。すなわち、急冷凝固によって、直径１０ｍｍ以上、さらには５０ｍｍ以上のチタン基非晶質合金丸棒の製造が可能となり、加工性も向上する。
【０００９】
さらに、ガス成分を除く不純物含有量が１０００ｗｔｐｐｍ以下であることが望ましい。ガス成分を除く不純物含有量が１０００ｗｔｐｐｍを超えると非晶質化に影響を与え、過冷却液体領域温度幅を縮小させ、また組成的にも安定しない。
また、酸素を含むガス成分含有量の総量が１ｗｔ％以下であることが望ましい。ガス成分としては、Ｏ、Ｎ、Ｈ、Ｃｌ、Ｓ、Ｐ及びＣが挙げられる。このガス成分の存在は酸素と同様の影響を与える。
【００１０】
本発明のチタン基非晶質合金は、非晶質の体積分率が８０％以上、さらには非晶質の体積分率が９０％以上を達成することができる。
本発明のチタン基非晶質合金は、特に鉄、コバルト、ニッケル及び銅から成る群から選択した１種又は２種以上の元素を含有し、残余チタン及び不可避的不純物であるチタン基非晶質合金、また上記に、アルミニウム、シリコン、錫及びアンチモンから成る群から選択した１種又は２種以上の元素をさらに含有するチタン基非晶質合金に有効である。
なお、酸素を中心とする不純物を低減させることによって、非晶質形成能及び非晶質の体積成分を向上させ、過冷却液体領域温度幅を広げ、さらには加工性を向上させる効果は他のチタン基非晶質合金にも適用できるものであり、本発明はこれらの適用を制限するものではなく、これらを包含するものである。
また、本発明のチタン基非晶質合金は加工性に富むことから、自動車の圧力センサー用歪ゲージ、マイクロマシンのギア等の機能性材料に使用が可能である。
【００１１】
【実施例及び比較例】
以下に実施例及び比較例を説明するが、本実施例は理解を容易にするためのものであり、本発明を制限するものではない。すなわち、本発明の技術思想の範囲内での他の変形あるいは他の実施例は、当然本発明に含まれる。
【００１２】
（実施例１）
酸素含有量４００ｐｐｍであるＴｉ−Ｎｉ−Ｃｕ系合金をアルゴン雰囲気の石英管内で溶解した後、噴出圧０．５〜２．０ｋｇ／ｃｍ２で銅製の金型に充填凝固させ、直径５ｍｍの非晶質合金塊（丸棒）を得た。
本合金のその他の主な不純物はＦｅ、Ｚｒである。
この非晶質合金塊の非晶質の大きさは体積成分率で９０％であった。また、この非晶質合金の過冷却液体領域温度幅は５０°Ｃとなり、強度は１９００ＭＰａに達した。加工性も向上し、耐食性も優れたチタン基非晶質合金が得られた。
【００１３】
（実施例２）
ガス成分（Ｏ：２００ｗｔｐｐｍ、Ｎ：１０ｗｔｐｐｍ、Ｈ：４ｗｔｐｐｍ、Ｃ：５０ｗｔｐｐｍ、Ｃｌ：１ｗｔｐｐｍ、Ｓ：２ｗｔｐｐｍ、Ｐ：１ｗｔｐｐｍ）、総量が５００ｐｐｍ以下であるＴｉ−Ｎｉ−Ｃｕ−Ｚｒ合金をアルゴン雰囲気の石英管内で溶解した後、噴出圧０．５〜２．０ｋｇ／ｃｍ２で銅製の金型に充填凝固させ、直径１０ｍｍの非晶質合金塊（丸棒）を得た。
本合金のその他の主な不純物はＦｅ、Ｃｒ等である。
この非晶質合金塊の非晶質の大きさは体積成分率で９０％であった。また、この非晶質合金の過冷却液体領域温度幅は５０°Ｃとなり、強度は２０００ＭＰａに達した。加工性も向上し、耐食性にも優れたチタン基非晶質合金が得られた。
【００１４】
（実施例３）
Ｏ含有量が５００ｗｔｐｐｍ、Ｏ以外のガス成分の総量が１０００ｗｔｐｐｍであり、不純物金属元素の合計量が約３００ｐｐｍであるＴｉ−Ｎｉ−Ｃｕ系合金をアルゴン雰囲気の石英管内で溶解した後、噴出圧０．５〜２．０ｋｇ／ｃｍ２で銅製の金型に充填凝固させ、直径４ｍｍの非晶質合金塊（丸棒）を得た。
この非晶質合金塊の非晶質の大きさは体積成分率で８０％であった。また、この非晶質合金の過冷却液体領域温度幅は３０°Ｃとなり、強度は１８００ＭＰａに達した。加工性も向上し、耐食性にも優れたチタン基非晶質合金が得られた。
【００１５】
（実施例４）
Ｏ含有量が９００ｗｔｐｐｍ、Ｏ以外のガス成分の総量が１０００ｗｔｐｐｍであり、不純物金属元素の合計量が約３００ｐｐｍであるＴｉ−Ｎｉ−Ｃｕ系合金をアルゴン雰囲気の石英管内で溶解した後、噴出圧０．５〜２．０ｋｇ／ｃｍ２で銅製の金型に充填凝固させ、直径３ｍｍの非晶質合金塊（丸棒）を得た。
この非晶質合金塊の非晶質の大きさは体積成分率で７５％であった。また、この非晶質合金の過冷却液体領域温度幅は３０°Ｃとなり、強度は１８５０ＭＰａに達した。加工性も向上し、耐食性にも優れたチタン基非晶質合金が得られた。
【００１６】
（比較例１）
ガス成分（Ｏ：８０００ｗｔｐｐｍ、Ｎ：２０００ｗｔｐｐｍ、Ｈ：１０ｗｔｐｐｍ、Ｃ：４００ｗｔｐｐｍ、Ｃｌ：１０００ｗｔｐｐｍ、Ｓ：３０ｗｔｐｐｍ、Ｐ：１００ｗｔｐｐｍ）、総量が１ｗｔ％以上であるＴｉ−Ｎｉ−Ｃｕ系合金をアルゴン雰囲気の石英管内で溶解した後、噴出圧０．５〜２．０ｋｇ／ｃｍ２で銅製の金型に充填凝固させ、直径０．１ｍｍの非晶質合金塊（丸棒）を得た。
この非晶質合金塊の非晶質の大きさは体積成分率で５０％であった。また、この非晶質合金の過冷却液体領域温度幅は１０°Ｃとなり、強度は３００ＭＰａであった。
【００１７】
（比較例２）
Ｏ含有量が１５００ｗｔｐｐｍ、Ｏ以外のガス成分の総量が１０００ｗｔｐｐｍであり、不純物金属元素の合計量が約３００ｐｐｍであるＴｉ−Ｎｉ−Ｃｕ系合金をアルゴン雰囲気の石英管内で溶解した後、噴出圧０．５〜２．０ｋｇ／ｃｍ２で銅製の金型に充填凝固させた。この場合、直径０．３ｍｍの非晶質合金塊（丸棒）しか得られなかった。
この非晶質合金塊の非晶質の大きさは体積成分率で６０％であった。また、この非晶質合金の過冷却液体領域温度幅は１５°Ｃとなり、強度は８００ＭＰａであり、強度的にも満足できるチタン基非晶質合金が得られなかった。
【００１８】
【発明の効果】
本発明のチタン基非晶質合金は、該チタン基非晶質合金の非晶質形成能と加工性を飛躍的に向上させると共に、その材料の保有する耐食性と強度を活かし、工業材料として十分適用できるチタン基非晶質合金を提供することができるという優れた効果を有する。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a titanium-based amorphous alloy having excellent corrosion resistance, strength, and workability.
[0002]
[Prior art]
In general, when an amorphous metal (metallic glass) is produced, a method of solidifying at once from a molten state is employed to suppress crystallization. As well-known methods, there are a twin-roll method, a single-roll method, and the like that can obtain a large cooling rate.
Depending on the type of metal or alloy, some are likely to be amorphous and others are not. Among them, titanium alloy has a problem that only about 1 mm wire can be produced because titanium alloy has low ability to form amorphous. is there.
[0003]
Titanium-based amorphous alloys, on the other hand, have superior corrosion resistance, have no reaction to living organisms (no biotoxicity), and have remarkably excellent properties of high strength compared to other amorphous materials. Have. For example, a Ti—Ni—Cu amorphous alloy has a supercooled liquid region of 30 ° C. or higher and a strength exceeding 1000 MPa.
Utilization of such materials as materials for medical materials, chemical devices, and the like is being studied. However, the range that can be practically used is extremely small because the shape that can be manufactured is extremely limited as described above.
For this reason, for practical use of a titanium-based amorphous alloy, the emphasis is mainly placed on the combination of alloy components, and the temperature width of the supercooled liquid region, the shape and dimensions that can be manufactured, and the workability are improved. A device has been devised (for example, see Patent Document 1).
However, there was a problem that the ability to form an amorphous phase was still poor, and only a thin wire of about 1 mm could be manufactured, and the workability was extremely poor.
[0004]
[Patent Document 1]
International Publication No. WO 99/49095
[Problems to be solved by the invention]
The present invention dramatically improves the amorphous forming ability and workability of a titanium-based amorphous alloy, and makes use of the corrosion resistance and strength possessed by the material to make it sufficiently applicable as an industrial material. I will provide a.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present inventors consider that impurities in a titanium-based amorphous alloy have an adverse effect on amorphous forming ability and workability, and by improving this, amorphous It has been found that it is possible to improve the quality forming ability and workability, and to make good use of corrosion resistance and strength.
[0007]
The present invention is based on the above findings,
1. 1. A titanium-based amorphous alloy having an oxygen content of 0.1% by weight or less. 2. A titanium-based amorphous alloy having an oxygen content of 0.05 wt% or less. 3. The titanium-based amorphous alloy according to the above 1 or 2, wherein the content of impurities other than gas components is 1000 wtppm or less. 4. The titanium-based amorphous alloy according to any one of the above 1 to 3, wherein the content of the gas component is 1 wt% or less. 5. The titanium-based amorphous alloy according to any one of 1 to 4, wherein the amorphous has a volume fraction of 80% or more. The titanium-based amorphous alloy according to any one of the above items 1 to 4, wherein the amorphous has a volume fraction of 90% or more.
BEST MODE FOR CARRYING OUT THE INVENTION
The titanium-based amorphous alloy of the present invention has an oxygen content of 0.1 wt% or less, and preferably has an oxygen content of 0.05 wt% or less. Among the impurities, the amount of oxygen is extremely important, and the presence of a large amount of oxygen significantly reduces amorphization.
By setting the oxygen content to 0.1 wt% or less, it is possible to increase the size (size) of the amorphous state by rapid solidification. That is, rapid solidification enables the production of a titanium-based amorphous alloy round bar having a diameter of 10 mm or more, and more preferably 50 mm or more, and also improves workability.
[0009]
Furthermore, it is desirable that the content of impurities excluding gas components is 1000 wtppm or less. If the content of impurities other than the gas components exceeds 1000 wtppm, it affects the amorphization, reduces the temperature width of the supercooled liquid region, and is not stable in composition.
Further, it is desirable that the total content of the gas components including oxygen is 1 wt% or less. Examples of gas components include O, N, H, Cl, S, P, and C. The presence of this gas component has a similar effect as oxygen.
[0010]
The titanium-based amorphous alloy of the present invention can achieve an amorphous volume fraction of 80% or more, and further, an amorphous volume fraction of 90% or more.
The titanium-based amorphous alloy of the present invention contains, in particular, one or more elements selected from the group consisting of iron, cobalt, nickel, and copper, and contains titanium as a residual titanium and unavoidable impurities. The alloy is effective for a titanium-based amorphous alloy further containing one or more elements selected from the group consisting of aluminum, silicon, tin and antimony.
In addition, by reducing impurities centering on oxygen, the amorphous forming ability and the volume component of the amorphous are improved, the temperature range of the supercooled liquid region is widened, and the effect of further improving the processability is another effect. The present invention is also applicable to titanium-based amorphous alloys, and the present invention does not limit these applications but encompasses them.
Further, since the titanium-based amorphous alloy of the present invention has excellent workability, it can be used for functional materials such as strain gauges for automobile pressure sensors and gears of micromachines.
[0011]
[Examples and Comparative Examples]
EXAMPLES Hereinafter, Examples and Comparative Examples will be described. However, the present Examples are intended to facilitate understanding, and do not limit the present invention. That is, other modifications or other embodiments within the technical idea of the present invention are naturally included in the present invention.
[0012]
(Example 1)
After dissolving a Ti-Ni-Cu alloy having an oxygen content of 400 ppm in a quartz tube in an argon atmosphere, it is filled and solidified in a copper mold at an ejection pressure of 0.5 to 2.0 kg / cm 2 to form a solid having a diameter of 5 mm. A crystalline alloy lump (round bar) was obtained.
Other main impurities of the present alloy are Fe and Zr.
The amorphous size of this amorphous alloy ingot was 90% by volume component ratio. The temperature width of the supercooled liquid region of the amorphous alloy was 50 ° C., and the strength reached 1900 MPa. A titanium-based amorphous alloy having improved workability and excellent corrosion resistance was obtained.
[0013]
(Example 2)
A gas component (O: 200 wtppm, N: 10 wtppm, H: 4 wtppm, C: 50 wtppm, Cl: 1 wtppm, S: 2 wtppm, P: 1 wtppm), and a Ti—Ni—Cu—Zr alloy having a total amount of 500 ppm or less in an argon atmosphere After being melted in a quartz tube, it was filled and solidified in a copper mold at an ejection pressure of 0.5 to 2.0 kg / cm 2 to obtain an amorphous alloy lump (round bar) having a diameter of 10 mm.
Other main impurities of the present alloy are Fe, Cr and the like.
The amorphous size of this amorphous alloy ingot was 90% by volume component ratio. The temperature width of the supercooled liquid region of this amorphous alloy was 50 ° C., and the strength reached 2000 MPa. Workability was also improved, and a titanium-based amorphous alloy having excellent corrosion resistance was obtained.
[0014]
(Example 3)
After dissolving a Ti-Ni-Cu-based alloy in which the O content is 500 wtppm, the total amount of gas components other than O is 1000 wtppm, and the total amount of impurity metal elements is about 300 ppm in a quartz tube in an argon atmosphere, the jet pressure is 0 A copper mold was filled and solidified at a pressure of 0.5 to 2.0 kg / cm 2 to obtain an amorphous alloy lump (round bar) having a diameter of 4 mm.
The amorphous size of the amorphous alloy ingot was 80% by volume component ratio. The temperature width of the supercooled liquid region of the amorphous alloy was 30 ° C., and the strength reached 1800 MPa. Workability was also improved, and a titanium-based amorphous alloy having excellent corrosion resistance was obtained.
[0015]
(Example 4)
After dissolving a Ti-Ni-Cu-based alloy in which the O content is 900 wtppm, the total amount of gas components other than O is 1000 wtppm, and the total amount of impurity metal elements is about 300 ppm in a quartz tube in an argon atmosphere, the ejection pressure is 0 A copper mold was filled and solidified at a pressure of 0.5 to 2.0 kg / cm 2 to obtain an amorphous alloy lump (round bar) having a diameter of 3 mm.
The amorphous size of this amorphous alloy ingot was 75% by volume component ratio. Further, the temperature width of the supercooled liquid region of this amorphous alloy was 30 ° C., and the strength reached 1850 MPa. Workability was also improved, and a titanium-based amorphous alloy having excellent corrosion resistance was obtained.
[0016]
(Comparative Example 1)
The gas components (O: 8000 wtppm, N: 2000 wtppm, H: 10 wtppm, C: 400 wtppm, Cl: 1000 wtppm, S: 30 wtppm, P: 100 wtppm), and a Ti-Ni-Cu alloy having a total amount of 1 wt% or more were placed in an argon atmosphere. After being melted in a quartz tube, it was filled and solidified in a copper mold at an ejection pressure of 0.5 to 2.0 kg / cm 2 to obtain an amorphous alloy lump (round bar) having a diameter of 0.1 mm.
The amorphous size of this amorphous alloy ingot was 50% by volume component ratio. The temperature width of the supercooled liquid region of this amorphous alloy was 10 ° C., and the strength was 300 MPa.
[0017]
(Comparative Example 2)
After dissolving a Ti-Ni-Cu-based alloy in which the O content is 1500 wtppm, the total amount of gas components other than O is 1000 wtppm, and the total amount of impurity metal elements is about 300 ppm in a quartz tube in an argon atmosphere, the ejection pressure is 0 A copper mold was filled and solidified at a pressure of 0.5 to 2.0 kg / cm 2 . In this case, only an amorphous alloy lump (round bar) having a diameter of 0.3 mm was obtained.
The amorphous size of this amorphous alloy ingot was 60% by volume component ratio. Further, the temperature width of the supercooled liquid region of this amorphous alloy was 15 ° C., the strength was 800 MPa, and a titanium-based amorphous alloy having satisfactory strength could not be obtained.
[0018]
【The invention's effect】
The titanium-based amorphous alloy of the present invention dramatically improves the amorphous forming ability and workability of the titanium-based amorphous alloy, and makes use of the corrosion resistance and strength possessed by the material. It has an excellent effect that an applicable titanium-based amorphous alloy can be provided.
Claims (6)
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