JP2558129B2 - Sliding member for compressor - Google Patents
Sliding member for compressorInfo
- Publication number
- JP2558129B2 JP2558129B2 JP62317389A JP31738987A JP2558129B2 JP 2558129 B2 JP2558129 B2 JP 2558129B2 JP 62317389 A JP62317389 A JP 62317389A JP 31738987 A JP31738987 A JP 31738987A JP 2558129 B2 JP2558129 B2 JP 2558129B2
- Authority
- JP
- Japan
- Prior art keywords
- sample
- sliding member
- compressor
- plating film
- amorphous
- 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 - Fee Related
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
- F01C21/08—Rotary pistons
- F01C21/0809—Construction of vanes or vane holders
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、例えばロータリーコンプレッサー、ポンプ
等に用いられるベーン、ローラ等耐摩耗、耐食性を有す
る圧縮機用摺動部材に関する。Description: TECHNICAL FIELD The present invention relates to a sliding member for a compressor having wear resistance and corrosion resistance such as vanes and rollers used in, for example, rotary compressors and pumps.
ロータリーコンプレッサー、ポンプ等に使用される圧
縮機用摺動部材例えばベーン、ローラ等は、高度な耐摩
耗性が要求される。それゆえに、圧縮機用摺動部材に耐
摩耗性を付与することを目的として、その摺動面に硬質
クロムめっき皮膜を形成させることが従来から多用され
ている。Sliding members for compressors used in rotary compressors, pumps, etc., such as vanes and rollers, are required to have high wear resistance. Therefore, forming a hard chromium plating film on the sliding surface has been widely used for the purpose of imparting wear resistance to the sliding member for a compressor.
［発明が解決しようとする問題点］ しかしながら、近年、圧縮機、特にロータリーコンプ
レッサーに於いてはインバーター方式の採用により、使
用条件もますます過酷なものとなってきており、高負荷
となるため従来の硬質クロムめっき皮膜を有する圧縮機
用摺動部材では耐摩耗性や耐食性が充分でない状況にあ
る。[Problems to be Solved by the Invention] However, in recent years, due to the adoption of an inverter system in compressors, especially rotary compressors, the operating conditions are becoming more and more severe, and the load becomes higher than before. The sliding member for a compressor having the above hard chrome plating film is in a situation where abrasion resistance and corrosion resistance are not sufficient.
［問題点を解決するための手段］ 本発明は、少なくとも一つの摺動面に、非晶質でなる
硬質クロムめっき皮膜が形成されていることを特徴とす
る圧縮機用摺動部材を提供することで上記の問題点を解
決するものである。[Means for Solving Problems] The present invention provides a sliding member for a compressor, wherein at least one sliding surface is formed with an amorphous hard chrome plating film. This solves the above problems.
［作用］ 本発明の非晶質硬質クロムめっきは、クロム酸、硫
酸、ギ酸よりなるめっき浴組成のめっき浴中で電気めっ
き法によって得ることができる。[Operation] The amorphous hard chromium plating of the present invention can be obtained by an electroplating method in a plating bath having a plating bath composition of chromic acid, sulfuric acid and formic acid.
非晶質硬質クロムめっきは結晶が緻密になり、めっき
被膜をＸ線回折すると従来の硬質クロムめっきはCrのピ
ークが出現するが、非晶質硬質クロムめっきはピークが
出現せずブロードとなり、Ｘ線回折により非晶質となっ
ている。Amorphous hard chrome plating has dense crystals, and when X-ray diffraction is performed on the plating film, a peak of Cr appears in the conventional hard chrome plating, but in amorphous hard chrome plating, a peak does not appear and it becomes broad. It became amorphous by line diffraction.
非晶質硬質クロムめっきは非晶質であるので、耐食性
に優れている。非晶質硬質クロムめっきは、従来の硬質
クロムめっき被膜の硬さHV800〜900に対し硬さがHV1,03
0〜HV1,200と硬く、又非晶質であるので表面処理層の高
硬度化と非晶質化との相乗効果により耐摩耗性、耐食性
を同時に満足する効果を有する。Amorphous hard chrome plating is amorphous and therefore has excellent corrosion resistance. Amorphous hard chrome plating has a hardness of HV1,03 compared with the hardness of conventional hard chrome plating HV800-900.
Since it is as hard as 0 to HV1,200 and is amorphous, it has the effect of simultaneously satisfying wear resistance and corrosion resistance by the synergistic effect of increasing the hardness of the surface treatment layer and making it amorphous.
［実施例］ 以下に本発明の実施例を図面に基づいて説明する。Embodiments Embodiments of the present invention will be described below with reference to the drawings.
第１図は、圧縮機用摺動部材の一例であるベーン
（１）のベーン母材（２）の外周面に非晶質でなる硬質
クロムめっき皮膜（３）を形成したものを示す。ベーン
母材（２）は、通常の焼結合金、鋳鉄が使用される。FIG. 1 shows a vane base material (2) of a vane (1), which is an example of a sliding member for a compressor, on which an amorphous hard chrome plating film (3) is formed. A normal sintered alloy or cast iron is used as the vane base material (2).
なお、本発明の摺動部材の非晶質でなる硬質クロムめ
っき皮膜は、めっき液が、クロム酸50〜200g/，硫酸
２〜10g/にギ酸（濃度85％）を２〜50ml/の範囲で
添加したものを使い、浴温20〜60℃，電流密度20〜60A/
dm2でめっきを行い形成される。前記ギ酸（HCOOH）は、
通常めっきで言うところの光沢剤の役割をしているた
め、結晶が緻密になりＸ線的に非晶質になる。従って、
クロムめっきに対して光沢剤となるものであれば、酢酸
（CH3COOH），ホルムアルデヒド（HCHO）やアセトアル
デヒト（CH3CHO）でも良い。The amorphous hard chrome plating film of the sliding member of the present invention has a plating solution in the range of 50 to 200 g / chromic acid, 2 to 10 g / sulfuric acid and formic acid (concentration 85%) in the range of 2 to 50 ml /. The bath temperature is 20-60 ℃, current density is 20-60A /
It is formed by plating with dm 2 . The formic acid (HCOOH) is
Since it plays the role of a brightening agent in ordinary plating, the crystals become dense and become amorphous in X-ray. Therefore,
Acetic acid (CH 3 COOH), formaldehyde (HCHO) or acetaldecht (CH 3 CHO) may be used as long as it is a brightening agent for chromium plating.
18mm×12mm×6mmの鋼製平板の片面をラッピングし１
μ以下の表面粗さに仕上げ、試料素材とした。この試料
の表面粗さが１μ以下の面以外の面をシールして、めっ
き液がクロム酸:100g/,H2SO4:5g/，ギ酸（HCOOH）:
20ml/の浴で、浴温:30℃，電流密度:40A/dm2でめっき
し、非晶質の硬質クロムめっき皮膜を形成した。この時
の皮膜厚さは50μで硬さはHv1,030であった。（試料No.
1‥本発明） 前記試料No.1を温度200℃で１時間熱処理を施した。
この時の皮膜の厚さは50μで、硬さはHv1,100であっ
た。（試料No.2‥本発明） また同様に、前記試料No.1を温度300℃で１時間熱処
理を施した。この時の皮膜の厚さは50μで、硬さはHv1,
200であった。（試料No.3‥本発明） 従来の硬質クロムめっきとしては、クロムめっき浴と
して従来最も一般的に行われている方法は所謂サージェ
ント浴であって、めっき液がクロム酸:250g/,H2SO4:
2.5g/で，浴温:60℃，電流密度:60A/dm2でめっきを行
った。この時の皮膜の厚さは50μで、硬さはHv880であ
った。（試料No.4‥従来例） なお、上記めっき皮膜の組織構成はＸ線回折によって
行った。第４図（ａ）〜（ｄ）より有らかな如く、試料
No.1〜３はＸ線回折を行うと第４図（ａ）〜（ｃ）に示
す如くブロードとなり、Ｘ線的に非晶質を示しているの
に対し、試料４はＸ線回折を行うと第４図（ｄ）に示す
如くピークを示し、クロムがＸ線的に結晶質を示してい
る。Wrap one side of a steel plate of 18 mm × 12 mm × 6 mm and 1
Finished to a surface roughness of μ or less and used as a sample material. The surface of this sample is sealed on surfaces other than 1 μm or less, and the plating solution is chromic acid: 100 g /, H 2 SO 4 : 5 g /, formic acid (HCOOH):
An amorphous hard chromium plating film was formed by plating in a bath of 20 ml / at a bath temperature of 30 ° C. and a current density of 40 A / dm 2 . At this time, the film thickness was 50μ and the hardness was Hv1,030. (Sample No.
1. Present Invention) The sample No. 1 was heat-treated at a temperature of 200 ° C. for 1 hour.
At this time, the thickness of the film was 50μ and the hardness was Hv1,100. (Sample No. 2 ... The present invention) Similarly, the sample No. 1 was heat-treated at a temperature of 300 ° C. for 1 hour. At this time, the film thickness is 50μ and the hardness is Hv1,
It was 200. (Sample No. 3 ... The present invention) As the conventional hard chrome plating, the most commonly used method as a chrome plating bath is a so-called sergent bath, and the plating solution is chromic acid: 250 g /, H 2 SO 4 :
Plating was performed at 2.5 g /, bath temperature: 60 ° C, and current density: 60 A / dm 2 . At this time, the thickness of the film was 50μ and the hardness was Hv880. (Sample No. 4 ... Conventional example) The structure of the plating film was determined by X-ray diffraction. As is apparent from FIGS. 4 (a) to 4 (d), the sample
Nos. 1 to 3 become broad as shown in FIGS. 4 (a) to (c) when X-ray diffraction is performed, and show amorphous X-rays, while sample 4 shows X-ray diffraction. When it was carried out, it showed a peak as shown in FIG. 4 (d), and chromium showed crystalline X-rays.
上記試料No.1〜４について、それぞれ耐摩耗性試験と
耐食性試験を行った。An abrasion resistance test and a corrosion resistance test were performed on the above sample Nos. 1 to 4, respectively.
（耐摩耗性試験） 上記試料No.1〜４を回転式摩耗試験機を用い、試料N
o.1〜４をそれぞれ固定片とし、相手部材は、円板状試
料（外径139mm,内径105mm,厚さ7mm,材質:FC25,硬さ:HRB
98）とし、固定片に形成されためっき皮膜が円板状試料
の上面にそれぞれ圧接し、その圧接面に対し、潤滑油を
供給しながら円板状試料を回転させて運転後の、固定片
の摩耗量を測定した。(Abrasion resistance test) The above sample Nos. 1 to 4 were subjected to sample N using a rotary abrasion tester.
o.1 to 4 are fixed pieces, and the mating member is a disk-shaped sample (outer diameter 139 mm, inner diameter 105 mm, thickness 7 mm, material: FC25, hardness: HRB
98), the plating film formed on the fixed piece presses against the upper surface of the disk-shaped sample respectively, and the disk-shaped sample is rotated while supplying lubricating oil to the pressed surface, and the fixed piece after operation The amount of wear was measured.
試験条件は次の通りである。 The test conditions are as follows.
摩擦速度:1.1m/秒 走行距離:30km 潤滑油:SAE＃30モータオイル 潤滑油量:100ml/分 油温:60℃ 荷重:80kg 試験結果を第２図に示す。Friction speed: 1.1 m / sec Running distance: 30 km Lubricating oil: SAE # 30 motor oil Lubricant amount: 100 ml / min Oil temperature: 60 ° C Load: 80 kg The test results are shown in Fig. 2.
図から明らかな如く、本発明の試料No.1〜３は、従来
例の試料No.4より優れた耐摩耗性を示した。As is clear from the figure, Sample Nos. 1 to 3 of the present invention showed better wear resistance than Sample No. 4 of the conventional example.
なお、従来の硬質クロムめっき皮膜を前述の条件で熱
処理すると硬さが低下したため、試験には使用しなかっ
た。これは、皮膜中の吸蔵水素が放出するためと考えら
れる。The conventional hard chrome plating film was not used in the test because its hardness decreased when heat-treated under the above conditions. It is considered that this is because the stored hydrogen in the film is released.
（耐食性試験） 前記試料No.1〜４を用いて、各試料のめっき皮膜以外
の面を四弗化エチレン樹脂製テープによりシールし、
塩酸（HCl）の液中、硫酸（H2SO4）の液中にそれぞれ
浸漬した後、シールをはがしそれぞれの液中に於ける腐
蝕減量を測定した。(Corrosion resistance test) Using Sample Nos. 1 to 4, the surface of each sample other than the plating film was sealed with a tape made of tetrafluoroethylene resin,
After dipping in a solution of hydrochloric acid (HCl) and a solution of sulfuric acid (H 2 SO 4 ), the seal was peeled off and the corrosion loss in each solution was measured.
試験条件は次の通りである。 The test conditions are as follows.
塩酸，硫酸のそれぞれの濃度:2.5％ 塩酸，硫酸のそれぞれの液温:70℃ 塩酸，硫酸のそれぞれの液量:1,000ml 浸漬時間:25分 試験結果を第３図に示す。Concentration of hydrochloric acid and sulfuric acid: 2.5% Liquid temperature of hydrochloric acid and sulfuric acid: 70 ° C Liquid volume of hydrochloric acid and sulfuric acid: 1,000 ml Immersion time: 25 minutes Figure 3 shows the test results.
図から明らかな如く、本発明の試料No.1〜３は、従来
例の試料No.4より優れた耐食性を示した。これは、従来
の硬質クロムめっき皮膜中のクロムの結晶間での腐食が
発生し、更に腐食が進行するためと考えられる。なお、
図中白ヌキの棒グラフは、塩酸（HCl）を、また斜線の
棒グラフは、硫酸（H2SO4）を使用した場合の試験結果
を示すものである。As is clear from the figure, Sample Nos. 1 to 3 of the present invention showed better corrosion resistance than Sample No. 4 of the conventional example. It is considered that this is because corrosion occurs between the crystals of chromium in the conventional hard chromium plating film and the corrosion further progresses. In addition,
In the figure, the white bar bar graph shows the test results when hydrochloric acid (HCl) was used, and the shaded bar graph shows the test results when sulfuric acid (H 2 SO 4 ) was used.
本発明の圧縮機用摺動部材において、その非晶質でな
る硬質クロムめっき皮膜の硬さは、Hv1,030〜Hv1,200で
あり、従来の硬質クロムめっき皮膜では得られないもの
である。また、皮膜厚さについては、圧縮機用摺動部材
として種々有るが５μ〜200μ程度であれば充分であ
る。In the sliding member for a compressor of the present invention, the hardness of the amorphous hard chrome plating film is Hv1,030 to Hv1,200, which cannot be obtained by the conventional hard chrome plating film. Regarding the film thickness, although there are various sliding members for compressors, it is sufficient if the film thickness is about 5 to 200 µ.
［発明の効果］ 上記の通り、本発明の圧縮機用摺動部材は、少なくと
も一つの摺動面に非晶質でなる硬質クロムめっき皮膜が
形成されている。したがって、従来のクロムの結晶質を
有する硬質クロムめっき皮膜では得られなかった硬さHV
1,030〜HV1,200の高硬度化被膜及び非晶質化皮膜との相
乗効果により、耐摩耗性、耐食性を同時に満足すること
ができる。従って、過酷な運転条件下で使用される圧縮
機用の摺動部材として特にその効果が顕著である。[Effects of the Invention] As described above, the sliding member for a compressor of the present invention has an amorphous hard chrome plating film formed on at least one sliding surface. Therefore, the hardness HV that could not be obtained with the conventional hard chrome plating film having the crystallinity of chromium.
Due to the synergistic effect of the hardened film of 1,030 to HV1,200 and the amorphized film, abrasion resistance and corrosion resistance can be satisfied at the same time. Therefore, the effect is particularly remarkable as a sliding member for a compressor used under severe operating conditions.
第１図は本発明の圧縮機用摺動部材の一例であるベーン
の断面図、第２図は耐摩耗性試験結果を示すグラフ図、
第３図は耐食性試験結果を示すグラフ図、第４図は各試
料についてのＸ線回折チャートを示す図、である。 図中の符号 １……ベーン ２……ベーン母材 ３……非晶質硬質クロムめっき皮膜FIG. 1 is a sectional view of a vane that is an example of a sliding member for a compressor of the present invention, and FIG. 2 is a graph showing the results of an abrasion resistance test.
FIG. 3 is a graph showing the results of the corrosion resistance test, and FIG. 4 is a view showing an X-ray diffraction chart for each sample. Symbols in the figure 1 ... Vane 2 ... Vane base material 3 ... Amorphous hard chrome plating film
Claims (3)
硬質クロムめっき皮膜が形成されていることを特徴とす
る圧縮機用摺動部材。1. A sliding member for a compressor, characterized in that an amorphous hard chrome plating film is formed on at least one sliding surface.
がHv1,030〜Hv1,200であることを特徴とする前記特許請
求の範囲第１項記載の圧縮機用摺動部材。2. The sliding member for a compressor according to claim 1, wherein the hardness of the amorphous hard chromium plating film is Hv1,030 to Hv1,200.
が５μ〜200μであることを特徴とする前記特許請求の
範囲第１項記載の圧縮機用摺動部材。3. The sliding member for a compressor according to claim 1, wherein the amorphous hard chromium plating film has a thickness of 5 μ to 200 μ.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62317389A JP2558129B2 (en) | 1987-12-17 | 1987-12-17 | Sliding member for compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62317389A JP2558129B2 (en) | 1987-12-17 | 1987-12-17 | Sliding member for compressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01159489A JPH01159489A (en) | 1989-06-22 |
| JP2558129B2 true JP2558129B2 (en) | 1996-11-27 |
Family
ID=18087708
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62317389A Expired - Fee Related JP2558129B2 (en) | 1987-12-17 | 1987-12-17 | Sliding member for compressor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2558129B2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS524507U (en) * | 1975-06-26 | 1977-01-13 |
-
1987
- 1987-12-17 JP JP62317389A patent/JP2558129B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01159489A (en) | 1989-06-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |