JPH063172B2 - Sliding member for internal combustion engine - Google Patents
Sliding member for internal combustion engineInfo
- Publication number
- JPH063172B2 JPH063172B2 JP61141562A JP14156286A JPH063172B2 JP H063172 B2 JPH063172 B2 JP H063172B2 JP 61141562 A JP61141562 A JP 61141562A JP 14156286 A JP14156286 A JP 14156286A JP H063172 B2 JPH063172 B2 JP H063172B2
- Authority
- JP
- Japan
- Prior art keywords
- internal combustion
- combustion engine
- sliding member
- film
- sample
- 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
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、例えばピストンリング，シリンダライナ，タ
ペット，ロッカーアーム等の内燃機関用摺動部材に関す
る。Description: TECHNICAL FIELD The present invention relates to a sliding member for an internal combustion engine, such as a piston ring, a cylinder liner, a tappet, a rocker arm, or the like.
往復動内燃機関に使用される摺動部材は、高度な耐摩耗
性が要求される。それゆえに、内燃機関用摺動部材に耐
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。A sliding member used in a reciprocating internal combustion engine is required to have a high degree of wear resistance. Therefore, for the purpose of imparting wear resistance to a sliding member for an internal combustion engine, it has been conventionally frequently used to form a hard chromium plating film on the sliding surface thereof.
［発明が解決しようとする問題点］ しかしながら、近年、内燃機関がますます高速化、高出
力化する傾向にあり、その使用条件もますます過酷なも
のとなってきており、従来の硬質クロムめっき皮膜を有
する内燃機関用摺動部材では耐摩耗性や耐食性が充分で
はない状況にある。[Problems to be Solved by the Invention] However, in recent years, internal combustion engines have tended to become faster and more powerful, and their operating conditions have become more and more severe. The sliding member for an internal combustion engine having a film is in a situation where the wear resistance and the corrosion resistance are not sufficient.
本発明は、上記に鑑みてなされたものであり、上記問題
点を解決し、優れた耐摩耗性、耐食性を有する内燃機関
用摺動部材を提供することを目的とする。The present invention has been made in view of the above problems, and an object thereof is to provide a sliding member for an internal combustion engine that solves the above problems and has excellent wear resistance and corrosion resistance.
［問題点を解決するための手段］ 上記目的を達成するための本発明の構成は、少なくとも
一つの摺動面に形成される硬質クロムめっき皮膜中に炭
素が１〜10重量％含有され、該皮膜硬さがHv1,100〜Hv
1,600でなるもので、また該皮膜中には炭化クロムが折
出してなるものである。[Means for Solving the Problems] In the constitution of the present invention for achieving the above object, the hard chromium plating film formed on at least one sliding surface contains 1 to 10% by weight of carbon, and Film hardness is Hv1,100 ~ Hv
It is composed of 1,600, and chromium carbide is projected in the film.
［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、内燃機関用摺動部材の一例であるピストンリ
ング(1)のピストンリング母体(2)の外周面に本発明の硬
質クロムめっき皮膜(3)を形成したものを示す。ピスト
ンリング母材(2)は、通常のステンレススチール、鋳鉄
が使用される。FIG. 1 shows a piston ring (1), which is an example of a sliding member for an internal combustion engine, having a hard chromium plating film (3) of the present invention formed on the outer peripheral surface of a piston ring base (2). As the piston ring base material (2), ordinary stainless steel or cast iron is used.
なお、本発明の摺動部材の硬質クロムめっき皮膜は、め
っき液が、クロム酸50〜200ｇ／ｌ，硫酸2〜10ｇ／ｌに
ギ酸（濃度８５％）を2〜50ｇ／ｌ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
きを行い皮膜を形成した後、熱処理を施して得られるも
のである。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(CH3 COOH)，ホルアルデヒド(HCH
O)やアクセントアルデヒド(CH3 CHO)でも良い。For the hard chrome plating film of the sliding member of the present invention, the plating solution added chromic acid 50 to 200 g / l, sulfuric acid 2 to 10 g / l and formic acid (concentration 85%) in the range of 2 to 50 g / l. It is obtained by performing a heat treatment after forming a film by plating at a bath temperature of 20 to 60 ° C. and a current density of 20 to 60 A / dm 2 using the above. The formic acid (HCOOH) plays a role of a brightening agent, which is generally called in plating, so that the crystal becomes dense and becomes amorphous. Therefore, acetic acid (CH 3 COOH), formaldehyde (HCH
O) or accent aldehyde (CH 3 CHO) may be used.
18mm×12mm×6mmの鋼製平板の片面をラッピングし１μ
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/l．H2SO4：5g/l，ギ酸(HCOOH)：20
ml/lの浴で、浴室：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後、温度
400℃で１時間熱処理を施した。この時の皮膜厚さは50
μで硬さはHv1,300であった。（試料NO.1…本発明） 前記試料NO.1の熱処理条件を温度600℃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Hv1,53
0であつた。（試料NO.2…本発明） 前記試料NO.1の熱処理条件を温度700℃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Hv1,60
0であった。また皮膜中にはＸ線解析による炭化クロム
が折出していた。これは、めっき皮膜中にとり込まれた
ギ酸が熱処理により炭化クロムを生成し、硬さを増大さ
せている。Lapping one side of a steel plate of 18 mm × 12 mm × 6 mm to 1μ
The following surface roughness was used as the sample material. The surface of this sample was sealed except for the surface having a surface roughness of 1 μm or less, and the plating solution was chromic acid: 100 g / l. H 2 SO 4 : 5 g / l, formic acid (HCOOH): 20
In a bath of ml / l, bath: 30 ℃, current density: 40A / dm 2 plating, after forming an amorphous hard chrome plating film, the temperature
It heat-processed at 400 degreeC for 1 hour. The film thickness at this time is 50
The hardness was μ and the hardness was Hv1,300. (Sample No. 1 ... Present Invention) The heat treatment condition of the sample No. 1 was heat treatment at a temperature of 600 ° C. for 1 hour. The thickness of the film at this time is 50μ, and the hardness is Hv1,53
It was 0. (Sample No. 2 ... Present Invention) The heat treatment conditions of the sample No. 1 were heat treatment at a temperature of 700 ° C. for 1 hour. The thickness of the film at this time is 50μ and the hardness is Hv1,60
It was 0. In addition, chromium carbide was found to have protruded into the film by X-ray analysis. This is because the formic acid incorporated in the plating film produces chromium carbide by heat treatment, increasing the hardness.
（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、めっき液ガクロム酸：250g/l,Ｈ２ＳＯ
４：2.5g/l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Hv88
0であった。（試料NO.4…従来例） 硬質クロムめっき皮膜中に含有される炭素については、
前記めっき浴中に添加されるギ酸に起因するもので、１
重量％未満では所望の硬さが得られず、10重量％超では
めっき皮膜中の内部応力が高くなることによりもろくな
り、また密着性が悪くなるため、１〜10重量％の範囲に
限定される。(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 a plating solution gachromic acid: 250 g / l, H 2 SO
4 : 2.5 g / l, bath temperature: 60 ° C. The plating was performed at a current density of 60 A / dm 2 . At this time, the film thickness is 50μ and the hardness is Hv88.
It was 0. (Sample No. 4 ... Conventional example) Regarding carbon contained in the hard chrome plating film,
It is caused by formic acid added to the plating bath.
If it is less than 10% by weight, the desired hardness cannot be obtained, and if it exceeds 10% by weight, it becomes brittle due to high internal stress in the plating film, and the adhesion becomes poor. It
本発明の内燃機関用摺動部材において、硬質クロムめっ
き皮膜の硬さは、優れた耐摩耗性、耐食性を得るために
はHv1,100〜Hv1,600必要であり、これは従来の硬質クロ
ムめっき皮膜出は得られないものである。また、皮膜の
厚さについては、内燃機関の摺動部材として種々あるが
５〜200μあれば充分である。In the sliding member for an internal combustion engine of the present invention, the hardness of the hard chrome plating film is Hv1,100 to Hv1,600 in order to obtain excellent wear resistance and corrosion resistance, which is the conventional hard chrome plating. Film formation cannot be obtained. Regarding the thickness of the film, there are various sliding members for internal combustion engines, but 5 to 200 μ is sufficient.
上記使用試料NO.１〜４について、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-mentioned use sample Nos. 1 to 4.
（耐摩耗性試験） 上記試料NO.１〜４を固定片とし、相手部材は、円板状
試験片（外径139mm，内径105mm，厚さ７mm，材質：FC2
5．硬さ：HRB98）とし、固定片に形成されためっき皮膜
が円板状試験片に接触するようにセットし、潤滑油を供
給しながら円板状試験片を回転させて摺動させた後、固
定片の摩耗性を測定した。(Abrasion resistance test) The above sample Nos. 1 to 4 were used as fixed pieces, and the other member was a disk-shaped test piece (outer diameter 139 mm, inner diameter 105 mm, thickness 7 mm, material: FC2
Five. Hardness: HRB98), set so that the plating film formed on the fixed piece contacts the disc-shaped test piece, rotate the disc-shaped test piece while sliding it while supplying lubricating oil, and then slide The wear resistance of the fixed piece was measured.
試験条件は次の通りである。The test conditions are as follows.
摺動速度：1.1ｍ／秒 摺動距離：30.7km 潤滑油：SAE♯20モータオイル 潤滑油の供給条件：100ml／分， 油温60℃〜65℃ 試験片の接触荷重：80kg 試験結果を第２図に示す。Sliding speed: 1.1 m / s Sliding distance: 30.7 km Lubricating oil: SAE # 20 motor oil Supply condition of lubricating oil: 100 ml / min, oil temperature 60 ℃ -65 ℃ Contact load of test piece: 80kg Shown in Figure 2.
図面から明らかな如く、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 drawings, 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、皮膜中に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 is released into the film.
（耐食性試験） 前記試料NO.１〜４について、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)および硫酸（Ｈ２ＳＯ４）の液中にそれぞれ浸
漬された後、シールをはがしその腐触減量を測定した。For (corrosion resistance test) The samples NO.1～4, the surface other than the plating film of each sample was sealed by tetrafluoride ethylene resin tape, respectively in the liquid of hydrochloric acid (HCl) and sulfuric acid (H 2 SO 4) After soaking, the seal was peeled off and its corrosion loss was measured.
試験条件は次の通りである。The test conditions are as follows.
塩酸，硫酸の濃度：2.5％ 塩酸，硫酸の液温：70℃ 塩酸，硫酸の液量：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 amount of hydrochloric acid and sulfuric acid: 1,000 ml Immersion time: 25 minutes The test results are shown in Fig. 3.
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の粒界腐触
が進むためと考えられる。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（Ｈ２
ＳＯ４）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 the intergranular corrosion of chromium crystals in the conventional hard chromium plating film progresses. In addition, in the figure, the bar graph with white lines is hydrochloric acid (HCl), and the bar graph with diagonal lines is sulfuric acid (H 2
It shows the test results when SO 4 ) is used.
［発明の効果］ 以上の通りで、本発明の内燃機関用摺動部材は、その摺
動面に従来の硬質クロムめっき皮膜では得られなかっ
た、皮膜を有することによる優れた耐摩耗性、耐食性が
得られ、過酷な運転条件下で使用される内燃機関の摺動
部材として特にその効果が顕著である。[Advantages of the Invention] As described above, the sliding member for an internal combustion engine of the present invention has excellent wear resistance and corrosion resistance due to having a coating, which cannot be obtained by the conventional hard chromium plating coating on the sliding surface. And the effect is particularly remarkable as a sliding member of an internal combustion engine used under severe operating conditions.
第１図は本発明の内燃機関用摺動部材の一例であるピス
トンリングの断面図、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、で
ある。 図中の符号 １…ピストンリング ２…ピストンリング母材 ３…本発明の硬質クロムめっき皮膜FIG. 1 is a cross-sectional view of a piston ring, which is an example of a sliding member for an internal combustion engine of the present invention, FIG. 2 is a graph showing wear resistance test results, and FIG. 3 is a graph showing corrosion resistance test results. is there. Reference numeral in the drawing 1 ... Piston ring 2 ... Piston ring base material 3 ... Hard chrome plating film of the present invention
Claims (2)
クロムめっき皮膜中に炭素が１〜10重量％含有され、該
皮膜硬さがHv1,100〜Hv1,600でなることを特徴とする内
燃機関用摺動部材。1. A hard chromium plating film formed on at least one sliding surface contains 1 to 10% by weight of carbon, and the film hardness is Hv1,100 to Hv1,600. Sliding member for internal combustion engine.
が折出していることを特徴とする前記特許請求の範囲第
１項記載の内燃機関用摺動部材。2. A sliding member for an internal combustion engine according to claim 1, wherein chromium carbide is projected in the hard chromium plating film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61141562A JPH063172B2 (en) | 1986-06-18 | 1986-06-18 | Sliding member for internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61141562A JPH063172B2 (en) | 1986-06-18 | 1986-06-18 | Sliding member for internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62298648A JPS62298648A (en) | 1987-12-25 |
| JPH063172B2 true JPH063172B2 (en) | 1994-01-12 |
Family
ID=15294857
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61141562A Expired - Fee Related JPH063172B2 (en) | 1986-06-18 | 1986-06-18 | Sliding member for internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH063172B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10011918B4 (en) * | 2000-03-11 | 2004-07-15 | Federal-Mogul Burscheid Gmbh | Piston ring with wear protection layer |
| JP4560255B2 (en) * | 2001-09-20 | 2010-10-13 | キヤノン株式会社 | Toner production method |
| JP5629978B2 (en) * | 2008-10-17 | 2014-11-26 | セイコーエプソン株式会社 | Toner carrying roller, developing device, and image forming apparatus |
| JP5403816B2 (en) * | 2010-02-03 | 2014-01-29 | トーカロ株式会社 | DLC film coated member and method for manufacturing the same |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5528379A (en) * | 1978-08-23 | 1980-02-28 | Nippon Piston Ring Co Ltd | Wear resistant sliding material for internal combustion engine |
| JPS5569743A (en) * | 1978-11-22 | 1980-05-26 | Nippon Piston Ring Co Ltd | Side rail for combined oil rings |
| JPS5823256A (en) * | 1981-08-05 | 1983-02-10 | Toyota Motor Corp | Piston ring |
| JPH063170Y2 (en) * | 1984-04-12 | 1994-01-26 | 帝国ピストンリング株式会社 | Steel combination oil ring |
-
1986
- 1986-06-18 JP JP61141562A patent/JPH063172B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62298648A (en) | 1987-12-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |