JPS6176659A - Method for hardening surface of metallic material - Google Patents

Method for hardening surface of metallic material

Info

Publication number
JPS6176659A
JPS6176659A JP19796984A JP19796984A JPS6176659A JP S6176659 A JPS6176659 A JP S6176659A JP 19796984 A JP19796984 A JP 19796984A JP 19796984 A JP19796984 A JP 19796984A JP S6176659 A JPS6176659 A JP S6176659A
Authority
JP
Japan
Prior art keywords
layer
metallic material
hardness
stellite
glow discharge
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
Application number
JP19796984A
Other languages
Japanese (ja)
Inventor
Susumu Shono
正野　進
Yoshihiro Tada
好宏 多田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP19796984A priority Critical patent/JPS6176659A/en
Publication of JPS6176659A publication Critical patent/JPS6176659A/en
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/80—After-treatment
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
    • C23C8/36—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases using ionised gases, e.g. ionitriding

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)

Abstract

PURPOSE:To improve the resistance of a metallic material to wear, erosion and corrosion by ion-nitriding the surface of the metallic material by glow discharge to form a nitride layer and by heat treating the layer at a specified temp. to convert the layer into a high strength surface layer. CONSTITUTION:The surface of a metallic material such as 'Stellite(R)' is ion- nitrided by glow discharge to form a nitride layer, and a surface part including the nitride layer is heat treated at 400-900 deg.C and cooled slowly. The heat treatment and slow cooling operations may be repeated.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は金属材料の表面硬化方法に関する。[Detailed description of the invention] [Industrial application field] The present invention relates to a method for surface hardening metal materials.

〔従来技術〕[Prior art]

金属材料の耐摩耗性、或いは耐コロージヨン性、耐コロ
ージヨン性を向上させるには、その表面の硬度を高める
ことが有効である。このようなことから、従来より金属
材料の表面にグロー放電によるイオン窒化法によシ窒化
層を形成することによって、その表面硬度を向上する方
法が知られている。In order to improve the wear resistance, corrosion resistance, or corrosion resistance of metal materials, it is effective to increase the hardness of their surfaces. For this reason, a method of improving the surface hardness of a metal material by forming a nitride layer on the surface of the metal material by an ion nitriding method using glow discharge has been known.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

しかしながら、従来方法にあっては金属材料の表面層の
硬度は母材の材質とグロー放電条件で決まる両者の両者
の関係で得られる硬さでしか向上しない。However, in the conventional method, the hardness of the surface layer of the metal material can only be improved by the hardness obtained by the relationship between the material of the base material and the glow discharge conditions.

本発明は、上記事情に鑑みなされたもので、イオン窒化
層の硬度よシ高硬度の表面層を形成し得る金属材料表面
の硬化方法を提供しようとするものである。The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a method for hardening the surface of a metal material that can form a surface layer with a hardness higher than that of the ion nitrided layer.

〔問題点を解決するための手段〕[Means for solving problems]

本発明は金属材料表面にグロー放電によるイオン窒化を
行なって窒化層を形成した後、該窒化層を少なくとも含
む部分を４００〜９００°Ｃの温度範囲にて加熱処理せ
しめることを特徴とするものである。The present invention is characterized in that after a nitrided layer is formed on the surface of a metal material by ion nitriding by glow discharge, a portion including at least the nitrided layer is heat-treated in a temperature range of 400 to 900°C. be.

〔作用〕[Effect]

上述したように金属材料表面に窒化層を形成し、更に所
定温度にて加熱処理することによって、高硬度の表面層
を有し、耐摩耗性、耐コロージヨン性、耐コロージヨン
性の優れた金属材料装品を得ることができる。As mentioned above, by forming a nitride layer on the surface of a metal material and further heat-treating it at a predetermined temperature, a metal material with a high hardness surface layer and excellent wear resistance, corrosion resistance, and corrosion resistance can be obtained. You can get accessories.

〔発明の実施例〕[Embodiments of the invention]

以下、本発明の詳細な説明する。 The present invention will be explained in detail below.

実施例１ ステライト表面をグロー放電によるイオン窒化法により
窒化層を形成した後、該窒化層を６００°Ｃの温度にて
加熱処理した。Example 1 A nitrided layer was formed on the surface of Stellite by an ion nitriding method using glow discharge, and then the nitrided layer was heat-treated at a temperature of 600°C.

実施例２ ステライト表面をグロー放電によるイオン窒化法により
窒化層を形成した後、該化層を６００℃で加熱処理し、
除冷する操作を３回縁シ返した。Example 2 After forming a nitrided layer on the stellite surface by an ion nitriding method using glow discharge, the nitrided layer was heat-treated at 600°C,
The slow cooling operation was repeated three times.

しかして、本実施例１，２で得られたステライト、並び
に窒化層のみを形成したステライトについて、表面から
母材の深さ方向の硬度（ビッカース）分布を測定したと
ころ、第１図に示す特性図を得た。なお、第１図中のＡ
−Ｃは夫３本実施例１，２及び比較例のステライトの特
性である。第１図から明らか、な如く、イオン窒化処理
のみのステライトは窒化層の硬さが約６５０、母材は約
４００であるのに対し、本実施例１，２では窒化層の硬
さが比較例（従来）のものに比べて約２倍弱、母材でも
１，２倍向上することがわかる。When we measured the hardness (Vickers) distribution from the surface to the depth direction of the base material for the stellite obtained in Examples 1 and 2 as well as the stellite with only a nitrided layer, we found the characteristics shown in Figure 1. I got the diagram. In addition, A in Figure 1
-C is the characteristic of the stellite of Examples 1 and 2 and Comparative Example. As is clear from Fig. 1, the hardness of the nitrided layer of stellite treated only with ion nitriding is about 650, and the hardness of the base material is about 400, whereas in Examples 1 and 2, the hardness of the nitrided layer is comparable. It can be seen that compared to the example (conventional), it is about 2 times or less, and the base material is also improved by 1 or 2 times.

また、上記実施例２において、加熱温度を変えて窒化層
の硬度変化を調べたところ、第２図に示す特性図を得た
。この第２図より、加熱温度範囲を４００〜９００°Ｃ
にすることによυ高硬化層を有するステライトを得るこ
とができることがわかる。Further, in the above Example 2, when the hardness change of the nitrided layer was investigated by changing the heating temperature, the characteristic diagram shown in FIG. 2 was obtained. From this figure 2, the heating temperature range is 400 to 900°C.
It can be seen that stellite with a highly hardened layer can be obtained by

〔発明の効果〕〔Effect of the invention〕

以上詳述した如く、本発明によれば高硬度の表面層を有
し、耐摩耗性、耐エロージヨン性、耐コロージヨン性の
金属材料製品を得ることができる等の顕著な効果をもつ
金属材料の表面硬化方法を提供できる。As detailed above, according to the present invention, a metal material product having a high hardness surface layer and having remarkable effects such as being able to obtain a metal material product having wear resistance, erosion resistance, and corrosion resistance. A surface hardening method can be provided.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本実施例１．２及び比較例のステライトにおけ
る表面から母材の深さ方向への硬度分布を示す特性図、
第２図は加熱処理の温度とステライト表面の窒化層の硬
度との関係を示す特性図である。 出１輛人代理人　弁理士　鈴　江　武　彦第１図 外ふ面声釦距飄ｍｍFIG. 1 is a characteristic diagram showing the hardness distribution from the surface to the depth direction of the base material in Stellite of Example 1.2 and Comparative Example,
FIG. 2 is a characteristic diagram showing the relationship between the temperature of heat treatment and the hardness of the nitrided layer on the surface of Stellite. 1st person agent Patent attorney Takehiko Suzue Figure 1 outside face voice button distance mm

Claims (1)

【特許請求の範囲】[Claims] 金属材料表面にグロー放電によるイオン窒化を行なって
窒化層を形成した後、該窒化層を少なくとも含む部分を
４００〜９００℃の温度範囲にて加熱処理せしめること
を特徴とする金属材料の表面硬化方法。A method for hardening the surface of a metal material, which comprises forming a nitrided layer on the surface of the metal material by ion nitriding by glow discharge, and then heat-treating at least a portion containing the nitrided layer in a temperature range of 400 to 900°C. .
JP19796984A 1984-09-21 1984-09-21 Method for hardening surface of metallic material Pending JPS6176659A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19796984A JPS6176659A (en) 1984-09-21 1984-09-21 Method for hardening surface of metallic material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19796984A JPS6176659A (en) 1984-09-21 1984-09-21 Method for hardening surface of metallic material

Publications (1)

Publication Number Publication Date
JPS6176659A true JPS6176659A (en) 1986-04-19

Family

ID=16383334

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19796984A Pending JPS6176659A (en) 1984-09-21 1984-09-21 Method for hardening surface of metallic material

Country Status (1)

Country Link
JP (1) JPS6176659A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1612290A1 (en) * 2004-07-02 2006-01-04 METAPLAS IONON Oberflächenveredelungstechnik GmbH Process and apparatus for gaseous nitriding of a workpiece and workpiece.
JP2008025651A (en) * 2006-07-19 2008-02-07 Keihin Corp Solenoid valve and its manufacturing process

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1612290A1 (en) * 2004-07-02 2006-01-04 METAPLAS IONON Oberflächenveredelungstechnik GmbH Process and apparatus for gaseous nitriding of a workpiece and workpiece.
JP2008025651A (en) * 2006-07-19 2008-02-07 Keihin Corp Solenoid valve and its manufacturing process
JP4672610B2 (en) * 2006-07-19 2011-04-20 株式会社ケーヒン Solenoid valve and manufacturing method thereof

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