JPS6021221B2 - Titanium surface hardening method - Google Patents
Titanium surface hardening methodInfo
- Publication number
- JPS6021221B2 JPS6021221B2 JP5370477A JP5370477A JPS6021221B2 JP S6021221 B2 JPS6021221 B2 JP S6021221B2 JP 5370477 A JP5370477 A JP 5370477A JP 5370477 A JP5370477 A JP 5370477A JP S6021221 B2 JPS6021221 B2 JP S6021221B2
- Authority
- JP
- Japan
- Prior art keywords
- titanium
- powder
- titanium surface
- surface hardening
- hardening method
- 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
Links
Description
【発明の詳細な説明】 本発明はチタンの表面硬化方法に関するものである。[Detailed description of the invention] The present invention relates to a method for hardening the surface of titanium.
チタンは他の金属に比較して比重が小さく、すぐれた耐
食性、機械的性質などを有し、化学機器、航空機部材な
ど各方面に使用されている。我々時計業界においても、
特に腕時計用外装材料として多くの可能性を有している
。Titanium has a lower specific gravity than other metals, and has excellent corrosion resistance and mechanical properties, and is used in various fields such as chemical equipment and aircraft components. Even in our watch industry,
In particular, it has many possibilities as an exterior material for wristwatches.
しかしながら耐摩耗性が劣るために引掻ききずや打ちき
ずなどを生じ易く、これを改善するために種々の表面硬
化法が提案されている。However, due to poor wear resistance, scratches and dents are likely to occur, and various surface hardening methods have been proposed to improve this problem.
・ その一つに窒化による表面硬化法があるが、この方
法によれば、その表面硬化層が極めて薄く耐用期間が短
いという欠点がある。- One of these methods is a surface hardening method using nitriding, but this method has the disadvantage that the surface hardened layer is extremely thin and has a short service life.
また、酸素を含む気流中で酸素拡散硬化層を形成する酸
化法が知られているが、硬化処理後の表面荒れや、変形
が大きい。更にニッケル、アルミニウムなど金属を拡散
させる硬化法など種々提案されているが、処理操作が煩
雑であったりしてそれぞれ不可避な欠点を有している。
本発明はチタンの表面に厚く、且つ適度なじん性を有す
る硬化層を形成させることを特徴とするものである。Furthermore, an oxidation method is known in which an oxygen diffusion hardened layer is formed in an air flow containing oxygen, but the surface roughness and deformation after hardening treatment are large. Furthermore, various hardening methods have been proposed, including diffusion of metals such as nickel and aluminum, but each method has unavoidable drawbacks such as complicated processing operations.
The present invention is characterized in that a thick hardened layer having appropriate toughness is formed on the surface of titanium.
本発明はチタンの表面を硬化する場合、被処理材である
チタンをＭ○、Ｗ粉末単独または混合した粉末中に埋没
させ、アルゴンガス雰囲気中にて７５０〜８５００Ｃに
加熱して、該粉末に吸着している酸素を解離させると共
に、その酸素をチタン中に拡散せしめることを特徴とす
るものであり、本発明によれば、被処理金属の表面にじ
ん性を有し、しかも厚い硬化層を効果的に形成すること
ができる。以下実施例に従って本発明の詳細を説明する
。When hardening the surface of titanium, the present invention immerses the titanium material to be treated in M○, W powder alone or in a mixed powder, heats it to 750 to 8500 C in an argon gas atmosphere, and hardens the titanium into the powder. This method is characterized by dissociating adsorbed oxygen and making it diffuse into titanium.According to the present invention, it is possible to effectively form a tough and thick hardened layer on the surface of the metal to be treated. can be formed. The details of the present invention will be explained below according to Examples.
実施例１ ステンレス製の容器内にＭＯ粉末（粒径２〜
３ム）を配し、そのＭＯ粉末中に工業用純チタンを埋没
させる。その容器を密閉型の炉に収め、アルゴンガス雰
囲気（１．５気圧）にて８５０℃で９曲時間保持して硬
化処理を行った。第１図にその硬度曲線を示すが、表面
硬度はＨＶ７００前後であり、適度なじん性を有してい
る。Example 1 MO powder (particle size 2~
3), and industrially pure titanium is embedded in the MO powder. The container was placed in a closed furnace and held at 850° C. for 9 hours in an argon gas atmosphere (1.5 atm) to perform a hardening treatment. The hardness curve is shown in FIG. 1, and the surface hardness is around HV700, indicating appropriate toughness.
また表面から１００仏の深さでＨＶ５００前後の硬さを
示しており、十分な硬化層の厚みがあることがわかる。
実施例２ ステンレス製の容器内にＷ粉末（粒径５〜６
り）を配し、そのＷ粉末中に工業用純チタンを埋没させ
る。Furthermore, the hardness was around HV500 at a depth of 100 mm from the surface, indicating that the hardened layer had a sufficient thickness.
Example 2 W powder (particle size 5-6
industrially pure titanium is buried in the W powder.
その容器を密閉型の炉に収５め、アルゴンガス雰囲気（
２．５気圧）にて８５０００で９曲時間保持して硬化処
理を行った。第１図にその硬度曲線を示すが、ＭＯ粉末
中で硬化処理した場合とほぼ同じカーブを描いている。The container was placed in a closed furnace and the argon gas atmosphere (
Hardening treatment was carried out by holding at 85,000 at a pressure of 2.5 atm for 9 hours. The hardness curve is shown in FIG. 1, and it shows almost the same curve as when hardening in MO powder.
１００山の深さでＨＶ５００前後の硬さを示しており、
十分な硬化層の厚みがあることがわかる。It shows a hardness of around HV500 at a depth of 100 peaks,
It can be seen that the thickness of the cured layer is sufficient.
また、第２図にその断面顕微鏡写真（倍率４２倍）を示
すが、非常に安定した硬化層の厚みが２００ム前後に達
しているのがわかる。本発明によれば密閉型の炉で硬化
処理を行うためにアルゴンガスの使用量もきわめて少は
〈、またＭ０、Ｗ粉末なども一度使用した後に、粉砕す
れば何回でも使用可能であり、きわめて経済的に、しか
も簡単な方法で厚い硬化層を得ることができる。Further, FIG. 2 shows a cross-sectional micrograph (42x magnification), and it can be seen that the thickness of the extremely stable hardened layer reaches around 200 μm. According to the present invention, the amount of argon gas used is extremely small because the hardening process is carried out in a closed furnace.Furthermore, M0, W powder, etc., can be used many times if used once and then pulverized. Thick hardened layers can be obtained in a very economical and simple manner.
また本発明は時計外装部品に限らず耐摩耗性向上を必要
とする機械部品などへの広範な応用が期待され得る。Further, the present invention can be expected to be widely applied not only to watch exterior parts but also to mechanical parts that require improved wear resistance.
第１図は純チタンを本発明により硬化処理した時の表面
からの深さに対する硬度分布図、第２図は硬化層の断面
顕微鏡写真（倍率４２音）である。
第１図鰯灘鰯FIG. 1 is a hardness distribution diagram with respect to depth from the surface when pure titanium is hardened according to the present invention, and FIG. 2 is a cross-sectional micrograph (magnification: 42 degrees) of the hardened layer. Figure 1 Sardines Nada Sardines
Claims (1)
接触させ、アルゴンガス等の不活性ガス雰囲気中で、該
粉末に吸着した酸素を解離させる温度以上に保持し、チ
タン表面に酸素を拡散せしめることを特徴とするチタン
の表面硬化方法。1 MO, W powder alone or a mixture of powders is brought into contact with titanium, and in an inert gas atmosphere such as argon gas, the temperature is maintained at a temperature higher than that at which oxygen adsorbed to the powder is dissociated, and oxygen is diffused onto the titanium surface. A titanium surface hardening method characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5370477A JPS6021221B2 (en) | 1977-05-12 | 1977-05-12 | Titanium surface hardening method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5370477A JPS6021221B2 (en) | 1977-05-12 | 1977-05-12 | Titanium surface hardening method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS53138936A JPS53138936A (en) | 1978-12-04 |
| JPS6021221B2 true JPS6021221B2 (en) | 1985-05-25 |
Family
ID=12950207
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5370477A Expired JPS6021221B2 (en) | 1977-05-12 | 1977-05-12 | Titanium surface hardening method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6021221B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003073796A (en) * | 2001-09-03 | 2003-03-12 | Fuji Oozx Inc | Surface treatment method for titanium-based material |
-
1977
- 1977-05-12 JP JP5370477A patent/JPS6021221B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS53138936A (en) | 1978-12-04 |
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