JPH04143264A - Titanium with modified surface layer - Google Patents
Titanium with modified surface layerInfo
- Publication number
- JPH04143264A JPH04143264A JP26571290A JP26571290A JPH04143264A JP H04143264 A JPH04143264 A JP H04143264A JP 26571290 A JP26571290 A JP 26571290A JP 26571290 A JP26571290 A JP 26571290A JP H04143264 A JPH04143264 A JP H04143264A
- Authority
- JP
- Japan
- Prior art keywords
- surface layer
- titanium
- elements
- stabilizing
- polishing
- 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.)
- Pending
Links
- 239000002344 surface layer Substances 0.000 title claims abstract description 27
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 title claims description 26
- 239000010936 titanium Substances 0.000 title claims description 26
- 229910052719 titanium Inorganic materials 0.000 title claims description 26
- 230000007935 neutral effect Effects 0.000 claims abstract description 9
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 6
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 6
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 6
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 5
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 5
- 238000006467 substitution reaction Methods 0.000 claims abstract description 5
- 229910052742 iron Inorganic materials 0.000 claims abstract description 4
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 4
- 229910052715 tantalum Inorganic materials 0.000 claims abstract description 4
- 229910052726 zirconium Inorganic materials 0.000 claims abstract description 4
- 229910052718 tin Inorganic materials 0.000 claims abstract description 3
- 230000000087 stabilizing effect Effects 0.000 claims description 8
- 239000006104 solid solution Substances 0.000 claims description 4
- 238000005498 polishing Methods 0.000 abstract description 9
- 239000007787 solid Substances 0.000 abstract 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 7
- 238000005242 forging Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000005121 nitriding Methods 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000010273 cold forging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 229910000734 martensite Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- FFRBMBIXVSCUFS-UHFFFAOYSA-N 2,4-dinitro-1-naphthol Chemical compound C1=CC=C2C(O)=C([N+]([O-])=O)C=C([N+]([O-])=O)C2=C1 FFRBMBIXVSCUFS-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 238000010000 carbonizing Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000007517 polishing process Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 150000003608 titanium Chemical class 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Landscapes
- Physical Vapour Deposition (AREA)
Abstract
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明番よ、表面層を改質したチタンに間する。[Detailed description of the invention] [Industrial application field] In the present invention, the surface layer is made of modified titanium.
本発明は、チタンにβ安定型元素である全率固溶型元素
のＭｏ、Ｖ、Ｎｂ、Ｔａ、共析型元素のＦｅ、Ｃｒ、Ｍ
ｎ、Ｃｏ、Ｎｉ、 α安定化元素である置換型元素の
Ａｌ、中性型元素テあるＳｎ。The present invention provides titanium with fully solid solution elements Mo, V, Nb, and Ta, which are β-stable elements, and eutectoid elements Fe, Cr, and M.
n, Co, Ni, Al which is a substitution type element which is an α stabilizing element, and Sn which is a neutral type element.
Ｚｒのうちの１元素以上の元素を表面層に添加したこと
により、チタンの表面層を改質し内部はチタンの高靭性
を保ちながら表面層の強度、硬度を上昇させたものであ
る。By adding one or more elements of Zr to the surface layer, the surface layer of titanium is modified to increase the strength and hardness of the surface layer while maintaining the high toughness of titanium inside.
従来、チタンの表面層改質は窒化や炭化によっている。 Conventionally, the surface layer of titanium has been modified by nitriding or carbonizing.
表面層は硬化されるが、表面の色は窒化の場合は黄金色
に、炭化の場合は黒色になる。また、表面層は非常に脆
い状態である。The surface layer is hardened, but the surface color becomes golden yellow in the case of nitriding and black in the case of carbonization. Moreover, the surface layer is in a very brittle state.
チタンは、非常に耐食性がよいことから化学工業に多く
使用されている。またチタン合金は、比強度が高い、高
温強度が高い、耐食性が良い等の利点を備えていること
から、構造用あるいは機械部品に多く使用されている。Titanium is widely used in the chemical industry because it has very good corrosion resistance. Furthermore, titanium alloys have advantages such as high specific strength, high high temperature strength, and good corrosion resistance, so they are often used for structural or mechanical parts.
また、最近ではチタン、チタン合金は軽い、耐食性が良
い等の理由により綻時計ケースのような装飾品にも使用
されている。Recently, titanium and titanium alloys have also been used for decorative items such as watch cases due to their light weight and good corrosion resistance.
チタンは、比較的安価で加工性も比較的良いが強度や硬
度が低く構造用としては不向きである。Titanium is relatively inexpensive and has relatively good workability, but its strength and hardness are low, making it unsuitable for structural use.
装飾品として使用した場合、硬度が低いので疵がつきや
すいために窒化等の硬化処理を施していたが、この場合
には表面層を研磨しても鏡面は得られず、また変色する
。したがって、デザインは単−的なものに限られる０強
度と硬度を上昇させるためにはチタン合金を使用するこ
とは有効である。When used as a decorative item, it has a low hardness and is easily scratched, so it is hardened by nitriding, but in this case, even if the surface layer is polished, a mirror surface cannot be obtained and the color changes. Therefore, the design is limited to a simple one, and it is effective to use a titanium alloy to increase strength and hardness.
また、熱処理後研摩することにより鏡面を得ることも特
願平１−２３３９２号公報に示すように可能であり、装
飾品として使用するにもデザインの多様化が可能であり
、非常に優れた材料である。In addition, it is possible to obtain a mirror surface by polishing after heat treatment, as shown in Japanese Patent Application No. 1-23392, and it is an extremely excellent material that can be used as a decorative item with a variety of designs. It is.
しかし、チタン合金は、材料が高価なうえに非常に加工
性が悪い、腕時計ケースの成形は、−船釣には冷間鍛造
や熱間鍛造によって行うが、チタン合金ではヤング率が
高く耐力が高いのでスプリングバックが太き（、また伸
びも小さいので、冷間鍛造や熱間鍛造と切削の組合わせ
によって成形していた。そのため、デザインは単一的な
形状に限られるとともに高価になっていた。However, titanium alloy is an expensive material and has very poor workability.Forging of watch cases is done by cold forging or hot forging for boat fishing, but titanium alloy has a high Young's modulus and has a high yield strength. Because it is expensive, it has a large springback (and elongation is small, so it was formed by a combination of cold forging or hot forging and cutting.As a result, designs were limited to a single shape and became expensive. Ta.
そこで本発明は、これらの問題点を解決するため、比較
的安価で加工性の良いチタンを用い、該チタンの表面層
にβ安定化元素である全率固溶型元素のＭｏ，Ｖ、Ｎｂ
、’ｒａ＋共析型元素のＦｅ。Therefore, in order to solve these problems, the present invention uses titanium which is relatively inexpensive and has good workability, and the surface layer of the titanium contains Mo, V, and Nb, which are β-stabilizing elements and are completely solid solution elements.
,'ra+eutectoid element Fe.
Ｃｒ、Ｍｎ、Ｃｏ、Ｎｉ、α安定化元素である置換型元
素のＡｔ、中性型元素であるＳｎ、Ｚｒのうちの１元素
以上の元素を添加することによりチタンの表面層を改質
するものである。The surface layer of titanium is modified by adding one or more of the following elements: Cr, Mn, Co, Ni, At, which is a substitution type element that is an α stabilizing element, and Sn, which is a neutral type element, and Zr. It is something.
チタンを所定の形状まで形成し、該チタンの成形物の表
面層にβ安定化元素である全率固溶型元素のＭｏ、Ｖ、
Ｎｂ、Ｔａ、共析型元素のＦｅ。Titanium is formed into a predetermined shape, and the surface layer of the titanium molded product is completely solid solution type elements Mo, V, which are β stabilizing elements,
Nb, Ta, and eutectoid element Fe.
Ｃｒ、Ｍｎ、Ｃｏ、Ｎｉ、α安定化元素である置換型元
素のＡｊ、中性型元素であるＳｎ、Ｚｒのうちの１元素
以上の元素を添加する。表面層を合金化した状態で熱処
理を行い、研磨することにより表面は高硬度で鏡面状態
になる。One or more elements of Cr, Mn, Co, Ni, Aj which is a substitution type element which is an α stabilizing element, and Sn and Zr which are neutral type elements are added. By heat-treating the alloyed surface layer and polishing it, the surface becomes highly hard and mirror-like.
次に本発明の実施例について説明する０本発明に使用し
た材料は日本工業規格１種のチタンである。該チタンを
用いて腕時計ケースを成形した。Next, examples of the present invention will be described. The material used in the present invention is titanium, Class 1 of the Japanese Industrial Standards. A wristwatch case was molded using the titanium.
まず、該チタンを鍛造により成形した。この状態では表
面層が軟らかく疵が付きやすいうえ、研磨によって鏡面
状態が得られないので他元素を添加して合金化する必要
がある。その前処理として予め該チタンの表面を研磨し
た。この処理は、仕上げ研摩代をできるだけ少なくする
ためである。この状態で該チタンの表面層にＶを添加し
た。添加深さは仕上げ研磨により数層研磨するのでＩｏ
ｎとした。研磨の工程を考えると表面からｌ〇−以上添
加量が必要である０次に、鏡面が得られるようにβ溶体
化処理と時効処理をほどこし、研磨し鏡面を得た。鏡面
を得るには表面組織がマルテンサイトからα層を微細に
析出させた組織が必要なので添加元素にはＶを選んだ、
同様に、添加元素としてβ安定化元素であるＭｏ、Ｆｅ
、Ｃｒ、Ｍｎについても同様に添加したが、熱処理と研
磨により鏡面が得られた。First, the titanium was formed by forging. In this state, the surface layer is soft and prone to scratches, and since a mirror surface cannot be obtained by polishing, it is necessary to add other elements to form an alloy. As a pretreatment, the surface of the titanium was polished in advance. The purpose of this process is to minimize the amount of finish polishing. In this state, V was added to the surface layer of the titanium. The depth of addition is Io because several layers are polished by final polishing.
It was set as n. Considering the polishing process, it is necessary to add an amount of 10- or more from the surface.Beta solution treatment and aging treatment were performed to obtain a mirror surface, followed by polishing to obtain a mirror surface. In order to obtain a mirror surface, the surface structure needs to be a structure in which α layers are finely precipitated from martensite, so V was selected as the additive element.
Similarly, Mo and Fe, which are β stabilizing elements, are added as additive elements.
, Cr, and Mn were added in the same manner, but a mirror surface was obtained by heat treatment and polishing.
Ｚ「は中性型元素であり、Ｚｒ単独で添加した場合は、
熱処理によってマルテンサイト変態しなかったが、Ｖと
Ｚｒの２元素を添加した場合は、■のみを添加した場合
よりも表面硬度は上昇した。Z" is a neutral type element, and when Zr is added alone,
Although martensitic transformation did not occur due to heat treatment, when two elements, V and Zr, were added, the surface hardness increased more than when only (■) was added.
Ａｔ’はα安定化元素であるが、ＡＩを添加することに
より鏡面は得られなかったが、強度と硬度は上昇した。Although At' is an α-stabilizing element, by adding AI, a mirror surface could not be obtained, but the strength and hardness increased.
以上のように、チタンで鏡面を得るには表面層にβ安定
化元素を１元素以上添加する必要がある。As described above, in order to obtain a mirror surface with titanium, it is necessary to add one or more β-stabilizing elements to the surface layer.
中性元素は、β安定化元素とともにチタンの表面層に添
加することによりβをより安定化させるのに効果がある
。A neutral element is effective in further stabilizing β when added to the surface layer of titanium together with a β stabilizing element.
本発明により、成形が比較的容易なチタンを使用するこ
とにより成形費が安くなり、内部はチタンの高靭性を持
ち表面層はチタン合金の特性を満足した０本発明はチタ
ンとチタン合金の特徴を金備えたものである。The present invention reduces molding costs by using titanium, which is relatively easy to mold, and has the high toughness of titanium inside and the surface layer that satisfies the characteristics of titanium alloys.The present invention is characterized by the characteristics of titanium and titanium alloys. It is equipped with gold.
以上のように、本発明によれば、チタンの表面層にβ安
定化元素あるいはα安定化元素、中性型元素を添加する
ことにより、材料費と加工費を低減させ、さらに表面層
はチタン合金の特徴である強度と硬度が高くなり、さら
に鏡面が得られる。As described above, according to the present invention, by adding β-stabilizing elements, α-stabilizing elements, and neutral elements to the surface layer of titanium, material costs and processing costs can be reduced, and furthermore, the surface layer is made of titanium. It increases the strength and hardness that are characteristic of alloys, and also provides a mirror surface.
したがって、腕時計ケースのような装飾品には最適な方
法である。Therefore, it is the best method for decorative items such as watch cases.
以 上Below Up
Claims (1)
Ｍｏ，Ｖ，Ｎｂ，Ｔａ，共析型元素のＦｅ，Ｃｒ，Ｍｎ
，Ｃｏ，Ｎｉあるいはα安定化元素である置換型元素の
Ａｌあるいは中性型元素であるＳｎ，Ｚｒのうちの１元
素以上の元素を添加したことを特徴とする表面層改質チ
タン。The surface layer of titanium contains β-stabilizing elements such as solid solution elements Mo, V, Nb, and Ta, and eutectoid elements Fe, Cr, and Mn.
, Co, Ni, Al as a substitution type element which is an alpha stabilizing element, or Sn and Zr as neutral type elements.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26571290A JPH04143264A (en) | 1990-10-03 | 1990-10-03 | Titanium with modified surface layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26571290A JPH04143264A (en) | 1990-10-03 | 1990-10-03 | Titanium with modified surface layer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04143264A true JPH04143264A (en) | 1992-05-18 |
Family
ID=17420966
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26571290A Pending JPH04143264A (en) | 1990-10-03 | 1990-10-03 | Titanium with modified surface layer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04143264A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115449743A (en) * | 2022-09-20 | 2022-12-09 | 江西省科学院应用物理研究所 | Alloy surface modification layer and preparation method thereof |
-
1990
- 1990-10-03 JP JP26571290A patent/JPH04143264A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115449743A (en) * | 2022-09-20 | 2022-12-09 | 江西省科学院应用物理研究所 | Alloy surface modification layer and preparation method thereof |
| CN115449743B (en) * | 2022-09-20 | 2024-01-26 | 江西省科学院应用物理研究所 | Alloy surface modification layer and preparation method thereof |
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