JPH037721B2 - - Google Patents
Info
- Publication number
- JPH037721B2 JPH037721B2 JP59202715A JP20271584A JPH037721B2 JP H037721 B2 JPH037721 B2 JP H037721B2 JP 59202715 A JP59202715 A JP 59202715A JP 20271584 A JP20271584 A JP 20271584A JP H037721 B2 JPH037721 B2 JP H037721B2
- Authority
- JP
- Japan
- Prior art keywords
- iron
- based sintered
- sintered body
- layer
- cro
- 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
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 91
- 229910052742 iron Inorganic materials 0.000 claims description 37
- 238000000034 method Methods 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 9
- 238000010304 firing Methods 0.000 claims description 7
- 239000010410 layer Substances 0.000 description 20
- 239000011247 coating layer Substances 0.000 description 15
- 239000011651 chromium Substances 0.000 description 14
- 238000005524 ceramic coating Methods 0.000 description 10
- 229910004298 SiO 2 Inorganic materials 0.000 description 8
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 7
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 6
- 239000007788 liquid Substances 0.000 description 5
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 4
- 238000005470 impregnation Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000002344 surface layer Substances 0.000 description 3
- 229910000423 chromium oxide Inorganic materials 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 238000007751 thermal spraying Methods 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical group [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 150000002505 iron Chemical class 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
Landscapes
- Powder Metallurgy (AREA)
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明はセラミツクスコーテイング層を有する
鉄系焼結部品の製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a method of manufacturing a ferrous sintered part having a ceramic coating layer.
鉄系焼結部品は機械部品に広く用いられてお
り、ロータリコンプレツサのロータやベーンのよ
うな耐摩耗性を要求される用途の機械部品にも用
いられている。
Iron-based sintered parts are widely used in mechanical parts, including rotary compressor rotors and vanes, which require wear resistance.
しかして、耐摩耗性を要求される用途に用いる
鉄系焼結部品においては、焼結体の表面に耐摩耗
性を有するセラミツクスコーテイング層を形成す
ることが行なわれている。 Therefore, in iron-based sintered parts used for applications requiring wear resistance, a ceramic coating layer having wear resistance is formed on the surface of the sintered body.
従来、鉄系焼結体にセラミツクスコーテイング
層を形成するためには、Al2O3，TiNなどのセラ
ミツクス材料を溶射により焼結体表面に接着する
方法が行なわれている。しかしながら、この溶射
法により形成したセラミツクスコーテイング層は
緻密さに乏しく焼結体との密着力が弱くて充分な
耐摩耗性を有することができず、従つて鉄系焼結
体に良好な耐摩耗性を与えることができないとい
う問題があつた。 Conventionally, in order to form a ceramic coating layer on an iron-based sintered body, a method has been used in which a ceramic material such as Al 2 O 3 or TiN is bonded to the surface of the sintered body by thermal spraying. However, the ceramic coating layer formed by this thermal spraying method is not dense enough and has weak adhesion to the sintered body, so it cannot have sufficient wear resistance. There was a problem of not being able to give sex.
本発明は前記事情に基づいてなされたもので、
耐摩耗性に優れたセラミツクスコーテイング層を
有する鉄系焼結部品の製造方法を提供することを
目的とする。
The present invention was made based on the above circumstances, and
The object of the present invention is to provide a method for manufacturing iron-based sintered parts having a ceramic coating layer with excellent wear resistance.
本発明の鉄系焼結部品の製造方法により製造し
た鉄系焼結部品は、焼結体表面部にFe3O4及び
Cr2O3を主体とするコーテイング層が形成されて
いることを特徴とするものである。
The iron-based sintered parts manufactured by the method for manufacturing iron-based sintered parts of the present invention contain Fe 3 O 4 and Fe 3 O 4 on the surface of the sintered body.
It is characterized in that a coating layer mainly composed of Cr 2 O 3 is formed.
Fe3O4及びCr2O3を主体とする層は、鉄系焼結
体の粒子である鉄酸化物Fe3O4の間にクロム酸化
物Cr2O3が散在して両者が一体となつた状態で焼
結体表面部に形成され、組織が緻密であるととも
に基材である焼結体に強固に結合して優れた耐摩
耗性を有している。 In the layer mainly composed of Fe 3 O 4 and Cr 2 O 3 , chromium oxide Cr 2 O 3 is interspersed between the iron oxide Fe 3 O 4 , which is the particle of the iron-based sintered body, and the two are integrated. It is formed on the surface of the sintered body in a loose state, has a dense structure, and is firmly bonded to the sintered body as a base material, thus having excellent wear resistance.
セラミツクスコーテイング層にクロム酸化物
Cr2O3を用いるのは、硬度の向上と摩擦係数を低
下させるためである。 Chromium oxide in ceramic coating layer
The purpose of using Cr 2 O 3 is to improve hardness and lower the coefficient of friction.
なおコーテイング層は、焼結体に接する側に
Fe3O4を主体とする層を形成することにより、基
材との接合力が大となる。また表面側にCr2O3を
主体とする層を形成することにより耐摩耗性が改
善される。更に表面側の層にAl2O3及びまたは
SiO2を含むものは更に耐摩耗性が向上する。 The coating layer is placed on the side that contacts the sintered body.
By forming a layer mainly composed of Fe 3 O 4 , the bonding force with the base material is increased. Furthermore, by forming a layer mainly composed of Cr 2 O 3 on the surface side, wear resistance is improved. Furthermore, Al 2 O 3 and or
Those containing SiO 2 further improve wear resistance.
本発明の鉄系焼結部品の製造方法は、鉄系焼結
体に水蒸気処理を施す工程と、前記鉄系焼結体に
CrO3を主成分とするものを含浸する工程と、
CrO3を主成分とするものを含浸した前記鉄系焼
結体を焼成する工程とを具備することを特徴とす
るものである。 The method for producing iron-based sintered parts of the present invention includes a step of subjecting an iron-based sintered body to steam treatment;
a step of impregnating with a substance whose main component is CrO 3 ;
The present invention is characterized by comprising a step of firing the iron-based sintered body impregnated with a substance containing CrO 3 as a main component.
本発明の製造方法では、はじめに鉄系焼結体に
水蒸気処理を施し、次いで鉄系焼結体をタンクに
入れたCrO3を主成分とする液の中に浸漬し、焼
結体の多数の気孔中にCrO3液を含浸させる。次
いで、CrO3液を含浸した鉄系焼結体を温度500〜
600℃で焼成して酸化処理を施し、焼結体表面部
にFe3O4及びCr2O3を主体とする層を形成する。
焼成温度を400〜650℃、好ましくは500〜600℃
（望ましくは550℃付近）とするのはCrO3をCr2O3
に変化させるためである。そして、この含浸工程
と焼成工程を組合せて１サイクルとして複数回繰
り返すことにより、鉄系焼結体の表面部に所定厚
さの緻密で強固なFe3O4＋Cr2O3からなるセラミ
ツクスコーテイング層を形成する。層厚は約５〜
50μである。なお、前記サイクルとサイクルとの
間に鉄系焼結体に機械加工を行なつても良い。こ
の加工は鉄系焼結体の精度を得るため及び硬度を
大にするために有効であり、また鉄系焼結体の仕
上げ加工を兼用することができる。 In the manufacturing method of the present invention, the iron-based sintered body is first subjected to steam treatment, and then the iron-based sintered body is immersed in a tank containing a liquid containing CrO 3 as the main component. Impregnate the pores with CrO3 solution. Next, the iron-based sintered body impregnated with 3 liquid CrO is heated to a temperature of 500~
It is fired at 600°C and subjected to oxidation treatment to form a layer mainly composed of Fe 3 O 4 and Cr 2 O 3 on the surface of the sintered body.
Firing temperature 400-650℃, preferably 500-600℃
(preferably around 550℃) is to convert CrO 3 to Cr 2 O 3
This is to change it to By combining this impregnation step and firing step and repeating it multiple times as one cycle, a dense and strong ceramic coating layer of Fe 3 O 4 + Cr 2 O 3 of a predetermined thickness is formed on the surface of the iron-based sintered body. form. Layer thickness is approximately 5~
It is 50μ. Note that machining may be performed on the iron-based sintered body between the cycles. This processing is effective for obtaining precision and increasing hardness of the iron-based sintered body, and can also be used for finishing processing of the iron-based sintered body.
また、鉄系焼結体にCrO3を含浸する工程の前
段階において、鉄系焼結体に水蒸気処理を施す
と、より強固で緻密なスコーテイング層を形成で
き、且つコーテイング層の厚さを調整でき、効果
的である。すなわち、水蒸気処理を施すことによ
り鉄系焼結体のFe粒子を酸化させてFe3O4を形成
する。その後に鉄系焼結体にCrO3を含浸すると、
CrO3がFe3O4の間に良好に分散して含浸すること
ができるからである。また水蒸気処理により形成
するFe3O4の厚さを調整することにより、セラミ
ツクスコーテイング層の厚さを調整できる。水蒸
気処理の温度は550℃である。 In addition, if the iron-based sintered body is subjected to steam treatment before the process of impregnating it with CrO 3 , a stronger and denser scoating layer can be formed, and the thickness of the coating layer can be reduced. Adjustable and effective. That is, by performing steam treatment, Fe particles of the iron-based sintered body are oxidized to form Fe 3 O 4 . If the iron-based sintered body is then impregnated with CrO3 ,
This is because CrO 3 can be well dispersed and impregnated between Fe 3 O 4 . Further, by adjusting the thickness of Fe 3 O 4 formed by steam treatment, the thickness of the ceramic coating layer can be adjusted. The temperature of steam treatment is 550℃.
さらに、本発明による製造方法の前段階におい
て、鉄系焼結体にAl2O3及びまたはSiO2を含む
CrO3からなる液を含浸する工程と、この含浸後
に鉄系焼結体を焼成（温度約550℃）の温度で焼
成する工程を組合せて行なうと、焼結体との結合
力がより大きなセラミツクスコーテイング層を形
成できる。すなわち、鉄系焼結体の表面部に基層
Fe3O4主体層、中間層Fe3O4＋Cr2O3＋Al2O3＋
SiO2主体層および表面層Cr2O3＋Al2O3＋SiO2主
体層からなる三層構造のセラミツクスコーテイン
グ層を形成できる。基層のFe3O4を主体とする層
は金属基体との接着力を大きくするもので５〜
10μあることが好ましい。また、表面層にAl2O3，
SiO2を含むCr2O3を形成してあるので耐摩耗性に
優れる。 Furthermore, in the pre-stage of the manufacturing method according to the present invention, the iron-based sintered body contains Al 2 O 3 and/or SiO 2 .
By combining the process of impregnating with a liquid consisting of CrO 3 and the process of firing the iron-based sintered body at a temperature of about 550℃ after this impregnation, it is possible to create ceramics with greater bonding strength with the sintered body. A coating layer can be formed. In other words, a base layer is formed on the surface of the iron-based sintered body.
Fe 3 O 4 main layer, intermediate layer Fe 3 O 4 +Cr 2 O 3 +Al 2 O 3 +
A ceramic coating layer with a three-layer structure consisting of a SiO 2 main layer and a surface layer Cr 2 O 3 +Al 2 O 3 +SiO 2 main layer can be formed. The base layer, which is mainly composed of Fe 3 O 4 , increases the adhesive strength with the metal substrate and has a
Preferably, the thickness is 10μ. In addition, the surface layer contains Al 2 O 3 ,
Since it is made of Cr 2 O 3 containing SiO 2 , it has excellent wear resistance.
表面層を前記のように複合層とする場合、
CrO3含浸工程の前段階において水蒸気処理を行
なうことにより、複合層の層厚さを制御すること
ができる。 When the surface layer is a composite layer as described above,
By performing steam treatment before the CrO 3 impregnation step, the layer thickness of the composite layer can be controlled.
（実施例 １）
焼結密度6.7ｇ／cm3、組成がFe−5Cr−1Ni−
0.9Cu−1.3Cからなる焼結体の空孔を鉄酸化物で
充填し、気密性を持たせた後に研摩加工し、ロー
タリコンプレツサー用ベーンを製造した。次い
で、このベーン材に温度約570℃、0.5時間の条件
で水蒸気処理を施し、所摩表面にFe3O4からなる
酸化被膜を形成した。このベーン材をCrO3液に
浸漬、乾燥し、約550℃、0.5時間で焼成した後冷
却させる。この浸漬から冷却までの工程を10回繰
り返し施した。そしてこのベーンをロータリ・コ
ンプレツサーに組込み、コンプレツサーを運転し
た結果、ベーンの摩耗は大変少なかつた。
(Example 1) Sintered density 6.7 g/cm 3 , composition Fe-5Cr-1Ni-
A vane for a rotary compressor was manufactured by filling the pores of a sintered body made of 0.9Cu-1.3C with iron oxide, making it airtight, and then polishing it. Next, this vane material was subjected to steam treatment at a temperature of about 570°C for 0.5 hours to form an oxide film made of Fe 3 O 4 on the surface of the vane. This vane material is immersed in 3 CrO liquid, dried, fired at approximately 550°C for 0.5 hours, and then cooled. This process from dipping to cooling was repeated 10 times. When this vane was incorporated into a rotary compressor and the compressor was operated, wear on the vane was extremely low.
（実施例 ２）
実施例１と同様の鉄系焼結体でなるベーンを製
造した。このベーンにまずAl2O3及びSiO2を含む
CrO3液に浸漬、乾燥し、約550℃、0.5時間で焼
成した。ついで、水蒸気処理を施こした。得られ
たベーン材に更にCrO3液を浸漬、乾燥（約550
℃）する工程を10回繰返した。得られたベーンの
コーテイング層は、基体側から５〜10μのFe3O4
主体層、約5μのFe3O4，Cr2O3，Sl2O3及びSiO2層
及び30〜40μのSl2O3，SiO2を含むCr2O3層で形成
されていた。このベーンの運転後の耐摩耗性は、
実施例１と同等以上であつた。(Example 2) A vane made of the same iron-based sintered body as in Example 1 was manufactured. This vane first contains Al 2 O 3 and SiO 2
It was immersed in 3 CrO solution, dried, and fired at approximately 550°C for 0.5 hours. Then, a steam treatment was performed. The obtained vane material was further soaked in 3 CrO liquid and dried (approximately 550
℃) was repeated 10 times. The coating layer of the obtained vane has a Fe 3 O 4 layer of 5 to 10 μ from the substrate side.
The main layer was formed of about 5 μ of Fe 3 O 4 , Cr 2 O 3 , Sl 2 O 3 and SiO 2 layers and 30 to 40 μ of Cr 2 O 3 layer containing Sl 2 O 3 and SiO 2 . The wear resistance of this vane after operation is
It was equal to or better than Example 1.
以上説明したように本発明の鉄系焼結部品の製
造方法によれば、鉄系焼結体に水蒸気処理を施す
工程と、鉄系焼結体にCrO3を主成分とするもの
を含浸する工程と、CrO3を主成分とするものを
含浸した鉄系焼結体を焼成する工程とを具備する
ので、焼結体の表面部にFe3O4及びCr2O3を主体
とする耐摩耗性に優れたセラミツクコーテイング
層を形成した鉄系焼結部品を得ることができ、こ
の鉄系焼結部品を耐摩耗性を要求される機械部品
に有効に用いることができる。
As explained above, according to the method for manufacturing iron-based sintered parts of the present invention, there are a step of subjecting an iron-based sintered body to steam treatment, and a step of impregnating the iron-based sintered body with a substance containing CrO 3 as a main component. and a step of firing the iron-based sintered body impregnated with CrO 3 as the main component, so that the surface of the sintered body is coated with resistant materials mainly containing Fe 3 O 4 and Cr 2 O 3 . It is possible to obtain an iron-based sintered part on which a ceramic coating layer with excellent wear resistance is formed, and this iron-based sintered part can be effectively used for mechanical parts that require wear resistance.
Claims (1)
鉄系焼結体にCrO3を主成分とするものを含浸す
る工程と、CrO3を主成分とするものを含浸した
前記鉄系焼結体を焼成する工程とを具備すること
を特徴とする鉄系焼結部品の製造方法。 ２ 鉄系焼結体の焼成温度は400〜650℃である特
許請求の範囲第１項に記載の鉄系焼結部品の製造
方法。[Scope of Claims] 1. A step of subjecting an iron-based sintered body to steam treatment, a step of impregnating the iron-based sintered body with a material containing CrO 3 as a main component, and a step of impregnating the iron-based sintered material with a material containing CrO 3 as a main component. A method for manufacturing an iron-based sintered part, comprising the step of firing the impregnated iron-based sintered body. 2. The method for manufacturing iron-based sintered parts according to claim 1, wherein the firing temperature of the iron-based sintered body is 400 to 650°C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20271584A JPS6179704A (en) | 1984-09-27 | 1984-09-27 | Iron-base sintered parts and their manufacture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20271584A JPS6179704A (en) | 1984-09-27 | 1984-09-27 | Iron-base sintered parts and their manufacture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6179704A JPS6179704A (en) | 1986-04-23 |
| JPH037721B2 true JPH037721B2 (en) | 1991-02-04 |
Family
ID=16461954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20271584A Granted JPS6179704A (en) | 1984-09-27 | 1984-09-27 | Iron-base sintered parts and their manufacture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6179704A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5514833A (en) * | 1978-07-17 | 1980-02-01 | Babcock Hitachi Kk | Heat-treating method |
| JPS59170276A (en) * | 1983-03-14 | 1984-09-26 | Toshiba Corp | Sintered member |
| JPS60224760A (en) * | 1984-04-21 | 1985-11-09 | Toyota Motor Corp | Sliding member having excellent wear resistance at high temperature |
-
1984
- 1984-09-27 JP JP20271584A patent/JPS6179704A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5514833A (en) * | 1978-07-17 | 1980-02-01 | Babcock Hitachi Kk | Heat-treating method |
| JPS59170276A (en) * | 1983-03-14 | 1984-09-26 | Toshiba Corp | Sintered member |
| JPS60224760A (en) * | 1984-04-21 | 1985-11-09 | Toyota Motor Corp | Sliding member having excellent wear resistance at high temperature |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6179704A (en) | 1986-04-23 |
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