JP3471092B2 - Decorative titanium alloy and its ornaments - Google Patents
Decorative titanium alloy and its ornamentsInfo
- Publication number
- JP3471092B2 JP3471092B2 JP22678394A JP22678394A JP3471092B2 JP 3471092 B2 JP3471092 B2 JP 3471092B2 JP 22678394 A JP22678394 A JP 22678394A JP 22678394 A JP22678394 A JP 22678394A JP 3471092 B2 JP3471092 B2 JP 3471092B2
- Authority
- JP
- Japan
- Prior art keywords
- hardness
- decorative
- powder
- titanium
- specularity
- 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
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- Adornments (AREA)
- Powder Metallurgy (AREA)
Description
【0001】[0001]
【産業上の利用分野】この発明は、チタン合金を用いた
装飾品、特に腕時計外装部品に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a decorative article using a titanium alloy, and more particularly to a wristwatch exterior part.
【0002】[0002]
【従来の技術】従来、装飾品、特に腕時計外装部品例え
ば、ベゼル、ケースの材料のほとんどに耐食性と鏡面性
の面からステンレス鋼が使用されている。近年、純チタ
ンがその耐食性及びニッケルによる皮膚アレルギー対応
の材料として用いられている。2. Description of the Related Art Conventionally, stainless steel has been used for most of decorative materials, particularly wristwatch exterior parts such as bezels and cases, from the viewpoint of corrosion resistance and specularity. In recent years, pure titanium has been used as a material for its corrosion resistance and nickel-induced skin allergy.
【0003】[0003]
【発明が解決しようとする課題】従来使用されているス
テンレス鋼は、比重が重い、硬度が低い、環境条件(特
に、海水)によって錆びる、ニッケルを含むため皮膚ア
レルギーを起こしやすい、等の課題を有していた。一
方、純チタンは、軽さ、耐食性、ニッケルアレルギー対
応の面では、ステンレス鋼より優れているが、鏡面が得
られない、傷つきやすい等の課題を有し、装飾用の材料
としてはデザインが単調となり高級感が得られないとい
う課題を有していた。Conventionally used stainless steels have the following problems: heavy specific gravity, low hardness, rust due to environmental conditions (especially seawater), and skin susceptibility to skin because nickel is contained. Had. On the other hand, pure titanium is superior to stainless steel in terms of lightness, corrosion resistance, and resistance to nickel allergy, but has problems such as lack of mirror surface and easy scratching, and its design is monotonous as a decorative material. Therefore, there is a problem that a high-class feeling cannot be obtained.
【0004】そこで、この発明の目的は装飾用チタン及
びチタン合金の鏡面性の向上をはかり、硬度を高めるこ
とである。Therefore, an object of the present invention is to improve the specularity and the hardness of decorative titanium and titanium alloys.
【0005】[0005]
【課題を解決するための手段】上記課題を解決するため
に、この発明はチタンに硬さを付与する鉄と組織の緻密
化を付与するモリブデンを合金化することにより、硬さ
のアップと鏡面性の改善を図り、β変態温度以上に加熱
急冷することによりさらに鏡面性を向上させるようにし
た。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention alloys titanium with iron which imparts hardness and molybdenum which imparts densification of structure, thereby increasing hardness and providing a mirror surface. In order to improve the specularity, the specularity was further improved by heating and quenching to the β transformation temperature or higher.
【0006】[0006]
【作用】上記方法によれば、鉄により硬さが高くなるの
で、傷つきがたく、また、モリブデンにより組成が緻密
化されるので鏡面性に優れた装飾品が得られる。According to the above method, since the hardness is increased by iron, it is less scratched, and the composition is densified by molybdenum, so that a decorative article excellent in mirror surface property can be obtained.
【0007】[0007]
(実施例1)粉末粒子の大きさが200μm以下の純チ
タン粉末と10μm以下の鉄粉末及び10μm以下のモ
リブデン粉末を混合し、これらの混合粉に0.5wt%
のステアリン酸を混合し、30kgf/mm2 の圧力で
型成形し成形体を得た。次にこれらの成形体を1350
℃で1時間保持し焼結を行い焼結体を得た。各焼結体の
相対密度は95%以上であり、組織は均一なα単相かα
+βの2相組織となり装飾品で要求される鏡面性が得ら
れる。表1に各焼結体の組成と硬さ・密度・鏡面性を示
す。特に溶製材の純チタンではビッカース硬さHv18
0であるが、鉄、あるいは、モリブデン量が増えるに従
って硬さが増す。試験を行ったチタン合金全ての焼結体
において硬さがHv250以上あり、ステンレス鋼の硬
さHv200以上を約Hv50越えることができ、装飾
部品として使用した場合には傷がつきにくく非常に有効
であった。同時に、鏡面性の向上も認めらる。特に、チ
タン粉末として、平均粒径が20μm以下の場合に密度
の向上が顕著であり、鏡面性もさらに向上する。(Example 1) Pure titanium powder having a particle size of 200 μm or less, iron powder having a particle size of 10 μm or less, and molybdenum powder having a particle size of 10 μm or less were mixed, and 0.5 wt% was added to these mixed powders.
Of stearic acid were mixed and molded under a pressure of 30 kgf / mm 2 to obtain a molded body. Next, these molded bodies were
Sintering was performed by holding at 1 ° C for 1 hour to obtain a sintered body. The relative density of each sintered body is 95% or more, and the structure is uniform α single phase or α
It becomes a + β two-phase structure and the specularity required for ornaments is obtained. Table 1 shows the composition, hardness, density and specularity of each sintered body. Especially, Vitas hardness Hv18 for pure titanium
Although it is 0, the hardness increases as the amount of iron or molybdenum increases. The hardness of all the sintered titanium alloys tested is Hv250 or more, and the hardness of stainless steel Hv200 or more can be exceeded by about Hv50. When used as a decorative part, it is hard to be scratched and very effective. there were. At the same time, improvement in specularity is also recognized. In particular, as the titanium powder, when the average particle diameter is 20 μm or less, the density is remarkably improved, and the specularity is further improved.
【0008】[0008]
【表1】
(実施例2)粉末粒子の大きさが200μm以下の純チ
タン粉末と10μm以下の鉄粉末及び10μm以下のモ
リブデン粉末を混合し、これらの混合粉に17〜18w
t%のEVA−St−CWAX系(酢酸ビニル共重合体
−ステアリン酸−カルナバワックス系)の有機物を混合
し、射出成形により成形体を得た。次にこれらの成形体
から有機物を除去し、その後1200℃,1250℃,
1300℃,1350℃で1時間保持し焼結を行い焼結
体を得た。各焼結体の相対密度は95%以上であり、組
織は均一なα単層かα+βの2相組織となり装飾品で要
求される鏡面性が得られる表2各焼結体の組成と硬さ・
密度・鏡面性を示す。特に硬度チタンではビッカース硬
さHv100であるが、鉄、あるいは、モリブデン量が
増えるに従って硬さが増す。試験を行ったチタン合金全
ての焼結体において硬さがHv250以上あり、ステン
レス鋼の硬さHv200以上を約Hv50越えることが
でき、装飾部品として使用した場合には傷がつきにくく
非常に有効であった。同時に、鏡面性の向上も認められ
る。特に、チタン粉末として、平均粒径が20μm以下
の場合に密度の向上が顕著であり、鏡面性もさらに向上
する。特に、圧粉成形に比較し2〜3%の密度増が認め
られ、鏡面性がより向上している。[Table 1] (Example 2) Pure titanium powder having a particle size of 200 μm or less, iron powder having a particle size of 10 μm or less, and molybdenum powder having a particle size of 10 μm or less were mixed, and 17 to 18 w were added to these mixed powders.
A t% EVA-St-CWAX-based (vinyl acetate copolymer-stearic acid-carnauba wax-based) organic material was mixed, and a molded body was obtained by injection molding. Next, organic matter is removed from these molded bodies, and then 1200 ° C, 1250 ° C,
Sintering was performed by holding at 1300 ° C and 1350 ° C for 1 hour to obtain a sintered body. The relative density of each sintered body is 95% or more, and the structure becomes a uniform α single layer or a two-phase structure of α + β and the mirror surface property required for ornaments can be obtained Table 2 Composition and hardness of each sintered body・
Shows density and specularity. In particular, titanium has a Vickers hardness of Hv100, but the hardness increases as the amount of iron or molybdenum increases. The hardness of all the sintered titanium alloys tested is Hv250 or more, and the hardness of stainless steel Hv200 or more can be exceeded by about Hv50. there were. At the same time, an improvement in specularity is also recognized. In particular, as the titanium powder, when the average particle diameter is 20 μm or less, the density is remarkably improved, and the specularity is further improved. In particular, a density increase of 2 to 3% was observed as compared with the powder compacting, and the mirror surface property was further improved.
【0009】[0009]
【表2】
この方法であると、有機物の除去時に生じる酸化、窒化
により硬度が実施例1より約20%高めになる。
(実施例3)各焼結体をβ変態温度以上の950℃で3
0分加熱し、油冷による急冷を行った(β溶体化処
理)。試験を行ったチタン合金(0.1wt%以上の
鉄、および、0.1wt%以上のモリブデンを含む)を
溶体化処理することにより硬度はほぼ変化しないが、組
織が微細化する。溶体化処理後の各焼結体を、バフ研磨
による鏡面仕上げを行った。その結果、鏡面性が著しく
向上した。各焼結体のにおける溶体化処理後の硬さ・鏡
面性を表3に示す。[Table 2] According to this method, the hardness becomes about 20% higher than that in Example 1 due to the oxidation and nitriding that occur when removing the organic matter. (Example 3) Each sintered body was heated to 3 at 950 ° C, which is higher than the β transformation temperature.
It was heated for 0 minutes and quenched by oil cooling (β solution treatment). By subjecting the tested titanium alloy (containing 0.1 wt% or more of iron and 0.1 wt% or more of molybdenum) to the solution treatment, the hardness is hardly changed, but the structure is refined. Each of the sintered bodies after the solution treatment was subjected to buffing for mirror finish. As a result, the specularity was remarkably improved. Table 3 shows the hardness and specularity of each sintered body after the solution treatment.
【0010】[0010]
【表3】 [Table 3]
【0011】[0011]
【発明の効果】本発明によれば、硬度が高く、鏡面性に
優れたチタン合金が得られると言う効果を有している。According to the present invention, there is an effect that a titanium alloy having high hardness and excellent mirror surface property can be obtained.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 宍戸 晃哉 東京都江東区亀戸6丁目31番1号 セイ コー電子工業株式会社内 (72)発明者 近藤 鉄也 愛知県名古屋市中川区戸田四丁目1809番 地 (56)参考文献 特開 平5−148568(JP,A) (58)調査した分野(Int.Cl.7,DB名) C22C 1/00 - 49/14 A44C 25/00 ─────────────────────────────────────────────────── --- Continuation of the front page (72) Inventor Koya Shishido 6-31-1, Kameido, Koto-ku, Tokyo Seiko Denshi Kogyo Co., Ltd. (72) Inventor Tetsuya Kondo 1809 Toda 4-chome, Nakagawa-ku, Nagoya-shi, Aichi Address (56) Reference JP-A-5-148568 (JP, A) (58) Fields investigated (Int.Cl. 7 , DB name) C22C 1/00-49/14 A44C 25/00
Claims (2)
0.1〜4.0%のモリブデン粉末を含み、残りがチタ
ン粉末で構成された混合粉を有機物と混練し、その混練
物を射出成形し得られた成形体から前記有機物を除去し
た後に1200〜1350℃で焼結したことを特徴とす
る装飾用チタン合金。 1. An iron powder having a mass ratio of 0.1 to 1.0%
Contains 0.1-4.0% molybdenum powder, the rest is titanium
Kneading the mixed powder composed of powdered powder with organic matter, and kneading
By removing the organic matter from the molded body obtained by injection molding
And then sintered at 1200 to 1350 ° C.
A decorative titanium alloy.
に加熱後、油冷以上の速度で冷却した後に、表面研磨し
鏡面化することを特徴とする請求項1に記載の装飾用チ
タン合金からなる装飾品。 2. The sintered body after sintering is at a β transformation point temperature or higher.
After heating, cool it at a speed faster than oil cooling, and then polish the surface.
The decorative chi according to claim 1, characterized in that it is mirror-finished.
An ornament made of tongue alloy.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22678394A JP3471092B2 (en) | 1994-09-21 | 1994-09-21 | Decorative titanium alloy and its ornaments |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22678394A JP3471092B2 (en) | 1994-09-21 | 1994-09-21 | Decorative titanium alloy and its ornaments |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0892674A JPH0892674A (en) | 1996-04-09 |
JP3471092B2 true JP3471092B2 (en) | 2003-11-25 |
Family
ID=16850549
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP22678394A Expired - Lifetime JP3471092B2 (en) | 1994-09-21 | 1994-09-21 | Decorative titanium alloy and its ornaments |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3471092B2 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4952912B2 (en) * | 2007-01-25 | 2012-06-13 | 株式会社Ihi | Method for manufacturing sintered body |
US20170067137A1 (en) | 2015-09-07 | 2017-03-09 | Seiko Epson Corporation | Titanium sintered body and ornament |
JP6911651B2 (en) | 2017-08-31 | 2021-07-28 | セイコーエプソン株式会社 | Titanium sintered body, ornaments and watches |
WO2019177039A1 (en) * | 2018-03-15 | 2019-09-19 | シチズン時計株式会社 | Titanium member, manufacturing method for titanium member, and decorative item including titanium member |
CN111172424B (en) * | 2020-01-17 | 2021-03-02 | 西部金属材料股份有限公司 | Titanium alloy for daily necessities and preparation method thereof |
-
1994
- 1994-09-21 JP JP22678394A patent/JP3471092B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH0892674A (en) | 1996-04-09 |
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