JP2001031906A - Coating composition for sliding member and piston ring for internal combustion engine - Google Patents
Coating composition for sliding member and piston ring for internal combustion engineInfo
- Publication number
- JP2001031906A JP2001031906A JP11208697A JP20869799A JP2001031906A JP 2001031906 A JP2001031906 A JP 2001031906A JP 11208697 A JP11208697 A JP 11208697A JP 20869799 A JP20869799 A JP 20869799A JP 2001031906 A JP2001031906 A JP 2001031906A
- Authority
- JP
- Japan
- Prior art keywords
- silicon nitride
- molybdenum disulfide
- sliding member
- resin
- piston ring
- 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.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J9/00—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction
- F16J9/26—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction characterised by the use of particular materials
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、摺動部材用被覆組
成物、及びかかる組成物を被覆した摺動部材、特に自動
車用ディーゼルエンジンのＴＯＰリングに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coating composition for a sliding member, and a sliding member coated with such a composition, particularly a TOP ring of a diesel engine for an automobile.
【０００２】[0002]
【従来の技術】ピストンリングの表面処理としてＭｏＳ
2などの固体潤滑剤を樹脂で結合した皮膜を形成するこ
とは、自動車工学シリーズ、「自動車用ピストンリング」
平成９年１０月６日（株）山海堂出版発行、第１５３〜
１５４頁に解説されている。また、ＭｏＳ2、グラファ
イト、ｈ−ＢＮとポリアミドイミド（ＰＡＩ）からなる
固体潤滑オーバレイがトライボロジー会議予稿集、東京
１９９９−５（開催日１９９９年５月１０−１２日）第
２３〜２４頁に発表されている。2. Description of the Related Art MoS is used as a surface treatment for a piston ring.
Forming a film in which a solid lubricant such as 2 is bonded with resin is used in the automotive engineering series, "Automotive Piston Rings".
Published October 6, 1997 by Sankaido Publishing Co., Ltd., No. 153-
It is explained on page 154. Also, a solid lubricating overlay consisting of MoS 2 , graphite, h-BN and polyamideimide (PAI) will be announced in the Tribology Conference Proceedings, Tokyo 1999-5 (held May 10-12, 1999), pp. 23-24. Have been.
【０００３】ところで、ディーゼルエンジンはその熱効
率の良さから地球環境温暖化に影響が大きいとされるＣ
Ｏ2の排出量が少なく、トラックや建設機械などの大型
エンジンに広く普及してきた。またヨーロッパでは同様
の理由から乗用車を中心に小型ディーゼルが普及してき
た。しかしながら、排出ガスについては窒素酸化物や粒
子状物質がガソリンエンジンに比べ多いと言う問題があ
り、近年厳しい排出ガス規制が適用されるようになって
きた。そのためＥＧＲの適用が始まってきており、また
一層の低燃費を達成するために燃焼圧の高圧化や高出力
化が実施されている。この動向に沿ってＴＯＰリングの
おかれる環境も苛酷になっているので、耐摩耗性、耐ス
カッフ性の向上が必要とされており、そのため、上記し
た固体潤滑膜以外に、Ｃｒめっき、複合分散めっき、ガ
ス窒化、イオンプレーティングの表面処理がＴＯＰリン
グの外周面の表面処理として行われている。[0003] Diesel engines are considered to have a great effect on global warming due to their good thermal efficiency.
Emissions of O 2 is small, it has been widely used in large engines such as trucks and construction machinery. For the same reason, small diesels have become popular in Europe, mainly for passenger cars. However, there is a problem that exhaust gas contains more nitrogen oxides and particulate matter than gasoline engines, and strict exhaust gas regulations have recently been applied. For this reason, the application of EGR has begun, and higher combustion pressure and higher output have been implemented in order to achieve even lower fuel consumption. In accordance with this trend, the environment in which the TOP ring is placed is becoming severe, and therefore, it is necessary to improve wear resistance and scuff resistance. Therefore, in addition to the solid lubricating film described above, Cr plating, composite dispersion Surface treatments such as plating, gas nitriding, and ion plating are performed as surface treatments on the outer peripheral surface of the TOP ring.
【０００４】[0004]
【発明が解決しようとする課題】公知のＭｏＳ2とポリ
アミドイミドからなる摺動部材用被覆組成物は、相手材
との摩擦力が著しく高く、かつ相手材とミクロ的に固体
接触状態で摺動すると、性能が不足し、特に、ディーゼ
ルエンジンのＴＯＰリングは、高い燃焼圧力とそれによ
るピストンリングのたおされによる過大な摩擦力の下で
シリンダーライナーと摺動にするので、被覆層にクラッ
クが発生し、あるいは被覆層がピストンリング本体から
剥離する。このようなクラックや剥離はディーゼルエン
ジンの運転初期、すなわちシリンダーのボアが加工直後
の状態（すなわちグリーンボア）で生じている。The known coating composition for a sliding member comprising MoS 2 and polyamideimide has a remarkably high frictional force with a counterpart material and slides in a microscopic solid contact state with the counterpart material. Then, the performance is insufficient, and in particular, the TOP ring of the diesel engine slides with the cylinder liner under high combustion pressure and the excessive frictional force due to the piston ring being pushed down, so that cracks are formed in the coating layer. Occurs or the coating layer peels off from the piston ring body. Such cracks and delaminations occur early in the operation of the diesel engine, that is, when the bore of the cylinder has just been machined (ie, the green bore).
【０００５】したがって、本発明は、ミクロ的に固体接
触状態で摺動する二硫化モリブデン−ポリアミドイミド
もしくはポリイミド系摺動部材用被覆組成物の摩擦力を
低減しかつ相手材の表面性状を改善することを目的とす
る。特に、本発明は、ディーゼルエンジンの運転初期に
おけるシリンダーライナーとの摩擦力を低減し、さらに
グリーンボアの表面性状改善を行いＴＯＰリング外周表
面処理のクラック、剥離を防止することを目的としてい
るAccordingly, the present invention reduces the frictional force of a molybdenum disulfide-polyamideimide or polyimide-based coating composition for a sliding member which slides in a microscopic solid contact state and improves the surface properties of a mating material. The purpose is to: In particular, an object of the present invention is to reduce the frictional force with a cylinder liner in the early stage of operation of a diesel engine, to improve the surface properties of a green bore, and to prevent cracks and peeling of the TOP ring outer peripheral surface treatment.
【０００６】[0006]
【課題を解決するための手段及び作用】本発明の第１
は、ポリアミドイミド樹脂及びポリイミド樹脂：４０〜
５０ｗｔ％、平均粒径１〜４μｍの二硫化モリブデン：
３５〜５５ｗｔ％、平均粒径０．５〜２．０μｍの窒化
珪素５〜２０ｗｔ％を成分とすることを特徴とする摺動
部材用被覆組成物に関するものであり、本発明の第２は
前記の被覆組成物が外周面に形成されていることを特徴
とするピストンリングである。以下、本発明の組成物の
成分を説明する。SUMMARY OF THE INVENTION The first aspect of the present invention is as follows.
Is a polyamide-imide resin and a polyimide resin: 40 to
Molybdenum disulfide of 50 wt%, average particle size of 1 to 4 μm:
A second aspect of the present invention relates to a coating composition for a sliding member, comprising 5 to 20 wt% of silicon nitride having an average particle diameter of 0.5 to 2.0 μm and 35 to 55 wt%. A piston ring characterized in that the coating composition of (1) is formed on the outer peripheral surface. Hereinafter, the components of the composition of the present invention will be described.
【０００７】ポリアミドイミド樹脂、ポリイミド樹脂は
本発明の摺動部用被覆材の基材となるものである。これ
らの樹脂はエンジニアリングプラスチックのなかでも最
上級の超耐熱性エンプラに属し、きわめて高い耐熱性と
優れた機械的性質や化学的性質を有する。これらを基材
に用いることで、より高温の摺動部に好適に利用できる
ものとすることができる。このポリアミドイミド樹脂ま
たはポリイミド樹脂の含有割合は４０〜５０ｗｔ％であ
る。４０ｗｔ％未満ではバインダーとしての保持力が低
下し、一方５０ｗｔ％を超える多量ではピグメント成分
である二硫化モリブデンと窒化珪素による摩擦力低減と
グリーンボアの表面性状改善の効果が低下する。[0007] The polyamideimide resin and the polyimide resin serve as the base material of the coating material for the sliding portion of the present invention. These resins belong to the superlative heat-resistant engineering plastics of the highest grade among engineering plastics, and have extremely high heat resistance and excellent mechanical and chemical properties. By using these for the base material, it is possible to suitably use them for higher temperature sliding parts. The content ratio of the polyamide imide resin or the polyimide resin is 40 to 50% by weight. If it is less than 40 wt%, the holding power as a binder is reduced, while if it is more than 50 wt%, the effect of reducing the frictional force and improving the surface properties of the green bore is reduced by the pigment components molybdenum disulfide and silicon nitride.
【０００８】つぎに本発明に用いる二硫化モリブデンは
固体潤滑剤として広く用いられており、４００℃までの
耐熱性があり、発熱を伴うような環境下で優れた耐荷重
性と耐久性を有している。この平均粒径は１〜４μｍ、
好ましくは１〜２μｍである。平均粒径１μｍ未満では
二硫化モリブデンの効果である耐荷重性と耐久性が不足
する。４μｍを超える大径では樹脂の保持力が低下し脱
落しやすくなる。また二硫化モリブデンの含有割合は３
５〜５５ｗｔ％であり、好ましくは４０〜５０ｗｔ％で
ある。この含有割合が３５ｗｔ％未満では摩擦力低減効
果が不足し、５５ｗｔ％を超える多量では樹脂の保持力
が低下し耐摩耗性が劣る。Next, molybdenum disulfide used in the present invention is widely used as a solid lubricant, has heat resistance up to 400 ° C., and has excellent load resistance and durability in an environment in which heat is generated. are doing. This average particle size is 1 to 4 μm,
Preferably it is 1-2 μm. When the average particle size is less than 1 μm, the load resistance and durability, which are the effects of molybdenum disulfide, are insufficient. If the diameter is larger than 4 μm, the holding power of the resin decreases and the resin easily falls off. The content ratio of molybdenum disulfide is 3
It is 5 to 55 wt%, preferably 40 to 50 wt%. If the content is less than 35 wt%, the effect of reducing the frictional force is insufficient, and if the content exceeds 55 wt%, the holding power of the resin is reduced and the wear resistance is poor.
【０００９】本発明の摺動部材用被覆組成物の最大の特
徴は、シリンダーのグリーンボアの表面性状を改善する
ために窒化珪素を含有するところにある。樹脂系トライ
ボ材料の添加剤として使用された場合に、窒化珪素粒子
は、六方晶系に属する結晶であるが二硫化モリブデンの
ような層状構造をもたない；酸化鉛のような塑性流動性
がなく粒子の硬さも大きいので潤滑性をもたないのでこ
の面からは、摺動特性の改善は期待できない。しかし、
窒化珪素は運転初期にシリンダーライナーのボア面に適
正なベアリング面を形成し、局部的な過大な応力の発生
を防ぐ研磨作用をもつことが分かった。ところで、シリ
ンダーライナーは一般に鋳鉄製であり、その内面である
ボアは一般には切削バイトで機械加工した後に砥石でホ
ーニング加工する。この機械加工は表面に大きな力を加
えて形状を作るため組織の粉砕、塑性変形と流動が生じ
ている。したがってボア表面はなめらかに見えてもミク
ロ的には材料のむしれや毛羽立ちがあり、これが運転初
期、荷重のかかったボアとリングの摺動面で油膜の厚さ
以上に突出した場合、局部的な過大応力となりＴＯＰリ
ングの表面処理皮膜のクラック、剥離の原因となる。勿
論、二硫化モリブデンによる潤滑作用やポリ（アミド）
イミド樹脂によるなじみ作用により樹脂系被覆層への攻
撃は緩和されるのであるが、これらの作用のみでは十分
ではない。また、窒化珪素のみでも十分な皮膜性能が得
られず、二硫化モリブデンと窒化珪素の両者が存在して
クラックや剥離を防止することができる。The most important feature of the coating composition for a sliding member of the present invention is that it contains silicon nitride in order to improve the surface properties of the green bore of the cylinder. When used as an additive in resinous tribomaterials, silicon nitride particles are crystals belonging to the hexagonal system but do not have a layered structure like molybdenum disulfide; However, since the particles have high hardness and do not have lubricity, no improvement in sliding characteristics can be expected from this aspect. But,
It has been found that silicon nitride forms an appropriate bearing surface on the bore surface of the cylinder liner in the early stage of operation, and has a polishing action to prevent the occurrence of local excessive stress. By the way, the cylinder liner is generally made of cast iron, and the bore, which is the inner surface thereof, is generally machined with a cutting tool and then honed with a grindstone. In this machining process, a great force is applied to the surface to form the shape, so that the tissue is crushed, plastically deformed and flowed. Therefore, even though the bore surface looks smooth, there is microscopic peeling and fluffing of the material, and if this protrudes beyond the oil film thickness on the sliding surface of the loaded bore and ring at the beginning of operation, it will be localized. This causes excessive stress and causes cracking and peeling of the surface treatment film of the TOP ring. Of course, molybdenum disulfide lubrication and poly (amide)
Attack on the resin-based coating layer is reduced by the conforming action of the imide resin, but these actions alone are not sufficient. Further, sufficient film performance cannot be obtained even with silicon nitride alone, and both molybdenum disulfide and silicon nitride can be present to prevent cracking and peeling.
【００１０】このボア表面性状を定量的に説明すると、
これは表面粗さ、すなわち、加工面の凹凸を表現する平
均粗さＲｚ、最大粗さＲｍａｘにより説明される。これ
に対し溝深さだけでなく、接触面として面圧を支える山
の部分の分布、または谷深さの分布を表すアボット負荷
曲線(Abbott Bearing Curve)によると、摺動特性と表面
性状の関係がさらに明らかになる。このアボット負荷曲
線は、表面がある量Ｃμｍ摩耗した時のベアリング面の
面積率をＴ％として曲線で表す。例えば初期から５μｍ
摩耗した時に７０％のベアリング面が存在することを意
味する。後述の実施例により具体的に説明する通り、窒
化珪素はベアリング面の形成を促進することができる。Quantitatively explaining the surface properties of the bore,
This is explained by the surface roughness, that is, the average roughness Rz and the maximum roughness Rmax expressing the unevenness of the processed surface. On the other hand, according to the Abbott Bearing Curve, which represents not only the groove depth but also the distribution of peaks that support surface pressure as a contact surface, or the distribution of valley depth, the relationship between sliding characteristics and surface properties Becomes even more apparent. This Abbott load curve is represented by a curve with the area ratio of the bearing surface when the surface is worn by a certain amount C μm as T%. For example, 5 μm from the beginning
It means that 70% of the bearing surface is present when worn. Silicon nitride can promote the formation of the bearing surface, as will be described in more detail with reference to examples described later.
【００１１】この窒化珪素の平均粒径を０．５〜２．０
μｍとする。０．５μｍ未満ではボアにベアリング面を
形成する効果が不足し、２．０μｍを超えるとベアリン
グ面の形成以上にボア材を攻撃してしまう。また窒化珪
素の含有割合は５〜２０ｗｔ％、好ましくは９〜１２ｗ
ｔ％である。５ｗｔ％未満ではボアにベアリング面を形
成する効果が不足し、２０ｗｔ％を超えるとベアリング
面の形成以上にボア材を攻撃してしまう。The silicon nitride has an average particle size of 0.5 to 2.0.
μm. If it is less than 0.5 μm, the effect of forming the bearing surface in the bore is insufficient, and if it exceeds 2.0 μm, the bore material is attacked more than the formation of the bearing surface. The content ratio of silicon nitride is 5 to 20 wt%, preferably 9 to 12 w%.
t%. If it is less than 5 wt%, the effect of forming the bearing surface in the bore is insufficient, and if it exceeds 20 wt%, the bore material is attacked more than the formation of the bearing surface.
【００１２】上述の通り、本発明に係る組成物は、高温
・高圧条件で鋳鉄、アルミニウム合金などの耐摩耗材料
と摺動する部材の表面層として優れた性能を有してい
る。その表面層の厚さは、通常５〜１５μmである。ま
た、表面層の形成方法は特に限定はないが、二硫化モリ
ブデン粒子及び窒化珪素粒子をポリ（アミド）イミド樹
脂と混合し、有機溶剤をさらに添加して十分に混合した
後スプレー法により基材に塗布し、その後２００〜２４
０℃で乾燥する方法が好ましい。表面層の粗さは特に限
定されない。本発明に係る摺動部材用被覆組成物の特に
好ましい用途は内燃機関のピストンリング、特にディー
ゼルエンジンのＴＯＰリング外周面用被覆である。ピス
トンリングの基材としては,公知のすべての材料を使用
することができるが、特に球状黒鉛鋳鉄,シリコンクロ
ム鋼,マルテンサイト系ステンレス鋼などを好ましく使
用することができる。また本発明の被覆組成物の下地処
理としてガス窒化処理を採用してもよい。As described above, the composition according to the present invention has excellent performance as a surface layer of a member that slides on a wear-resistant material such as cast iron or an aluminum alloy under high temperature and high pressure conditions. The thickness of the surface layer is usually 5 to 15 μm. The method for forming the surface layer is not particularly limited, but the molybdenum disulfide particles and the silicon nitride particles are mixed with a poly (amide) imide resin, an organic solvent is further added, and the mixture is sufficiently mixed. And then 200 to 24
Drying at 0 ° C. is preferred. The roughness of the surface layer is not particularly limited. A particularly preferred application of the coating composition for a sliding member according to the present invention is a coating for an outer peripheral surface of a piston ring of an internal combustion engine, particularly a TOP ring of a diesel engine. As the base material of the piston ring, all known materials can be used, and particularly, spheroidal graphite cast iron, silicon chrome steel, martensitic stainless steel, and the like can be preferably used. Further, a gas nitriding treatment may be employed as a base treatment of the coating composition of the present invention.
【００１３】[0013]
【実施例】つぎに実施例について比較例とともに説明す
る。EXAMPLES Next, examples will be described together with comparative examples.
【表１】 [Table 1]
【００１４】本実施例においては市販のポリアミドイミ
ドワニス（ＰＡＩ樹脂：３０ｗｔ％、ｎ−メチル−２−
ピロリドン：５０ｗｔ％、キシレン：２０ｗｔ％からな
る）にピグメント成分として二硫化モリブデン（ＭｏＳ
2）、窒化珪素（Ｓｉ3Ｎ4）を加え、攪拌・分散処理を
行い粘度220ｍＰａ・Ｓ（２０℃）のコーティング材を
作成した。ポリアミドイミド樹脂とピグメント成分の配
合量については、ポリアミドイミド樹脂の配合量はその
固形分（ＰＡＩ樹脂）の量が表1に規定する樹脂の配合
量になるように配合し、ピグメント成分の配合量をあわ
せて１００ｗｔ％となるように調整した。二硫化モリブ
デンと窒化珪素の配合量は表1のピグメント成分の欄に
記した。ピグメント成分の粒径はレーザー回折法による
５０％平均粒径で二硫化モリブデンが１．４６μｍ、窒
化珪素が０．６５μｍである。なお表1に示す実施例１
〜９の試料が本発明の範囲内にある実施例に相当するも
ので、比較例１〜９の試料がポリアミドイミド樹脂並び
にピグメント成分としての二硫化モリブデン、窒化珪素
の配合量が本発明の範囲外にあるものであり、比較例１
０〜１１がピグメント成分の粒径が本発明の範囲外にあ
る比較例に相当するものである。In the present embodiment, a commercially available polyamideimide varnish (PAI resin: 30 wt%, n-methyl-2-
Molybdenum disulfide (MoS) as a pigment component in pyrrolidone: 50 wt% and xylene: 20 wt%
2 ), silicon nitride (Si 3 N 4 ) was added, and the mixture was stirred and dispersed to prepare a coating material having a viscosity of 220 mPa · S (20 ° C.). Regarding the compounding amount of the polyamideimide resin and the pigment component, the compounding amount of the polyamideimide resin is such that the amount of the solid content (PAI resin) is the compounding amount of the resin specified in Table 1, and the compounding amount of the pigment component Was adjusted to be 100 wt%. The amounts of molybdenum disulfide and silicon nitride are shown in the column of pigment component in Table 1. The particle size of the pigment component is 50% average particle size by laser diffraction method. Molybdenum disulfide is 1.46 μm and silicon nitride is 0.65 μm. Example 1 shown in Table 1
The samples of Comparative Examples 1 to 9 correspond to Examples in which the amounts of the polyamideimide resin and the molybdenum disulfide and the silicon nitride as the pigment components are within the range of the present invention. Comparative Example 1
0 to 11 correspond to Comparative Examples in which the particle size of the pigment component is out of the range of the present invention.
【００１５】作成したコーティング材料をＳＵＳ４４０
Ｂをガス窒化した基材（アルカリ脱脂済）に膜厚が８〜
１０μｍとなるようにエアスプレーにてコーティング
し、２３０℃×９０分の条件で焼成し、硬化させて樹脂
被覆層を形成した。The prepared coating material is SUS440.
Film thickness of 8 ~
It was coated by air spray so as to have a thickness of 10 μm, baked at 230 ° C. for 90 minutes, and cured to form a resin coating layer.
【００１６】（評価試験）スラスト型試験機により摩擦
係数と皮膜摩耗量及び相手ＦＣ２５０材のベアリング面
の形成をアボット負荷曲線より摩耗量０．６μｍでの接
触比ｔｐ（０．６μｍ）で調べた。(Evaluation Test) Using a thrust type testing machine, the friction coefficient, the amount of film wear and the formation of the bearing surface of the mating FC250 material were examined from the Abbott load curve by the contact ratio tp (0.6 μm) at the wear amount of 0.6 μm. .
【００１７】評価条件を以下に示す。 摺動速度：１．０ｍ／ｓｅｃ 面圧：６．５ＭＰａ 潤
滑：ＳＡＥ２０ ３０ｃｃ／ｍｉｎ 摺動距離：２００
０ｍ 相手材：ＦＣ２５０結果を表２に示す。The evaluation conditions are shown below. Sliding speed: 1.0 m / sec Surface pressure: 6.5 MPa Lubrication: SAE20 30 cc / min Sliding distance: 200
0m Counterpart material: FC250 The results are shown in Table 2.
【００１８】[0018]
【表２】 [Table 2]
【００１９】表２から明らかなように、本発明の範囲内
にある実施例１〜９に係るものは基材となるポリアミド
イミド樹脂並びにピグメント成分としての二硫化モリブ
デン、窒化珪素の配合量が本発明の範囲外にある比較例
１〜９、ピグメント成分の粒径が本発明の範囲外にある
比較例１０〜１１に比べ、試験開始直後の摩擦係数が低
く、２０００ｍ摺動時の摩擦係数はさらに低下しており
摩擦力低減効果が高い。さらに接触比ｔｐ（０．６μ
ｍ）で示したベアリング面の形成率も高くグリーンボア
の表面性状改善効果が高いことを示している。また皮膜
自身の摩擦量も少なく耐摩耗性も高いことを示してい
る。As is clear from Table 2, the compositions according to Examples 1 to 9 which are within the scope of the present invention have a polyamideimide resin as a base material, and molybdenum disulfide and silicon nitride as pigment components. Compared with Comparative Examples 1 to 9 which are out of the range of the present invention and Comparative Examples 10 to 11 in which the particle size of the pigment component is out of the range of the present invention, the friction coefficient immediately after the start of the test is low, and the friction coefficient when sliding 2000 m is It is further reduced, and the effect of reducing the frictional force is high. Further, the contact ratio tp (0.6 μ
The formation rate of the bearing surface indicated by m) is also high, indicating that the effect of improving the surface properties of the green bore is high. Further, it shows that the amount of friction of the film itself is small and the wear resistance is high.
【００２０】実施例８において２０００m摺動後皮膜の
表面状態を観察した写真を図２、図３、図４に示す。図
３のSの面分析と図４のSiの面分析より摺動により二硫
化モリブデンと窒化珪素が複合された強固な複合樹脂皮
膜を形成しており、窒化珪素がボアのベアリング面の形
成効果とともに皮膜の強化粒子として優れた耐摩耗性を
付与していることが分かる。FIGS. 2, 3 and 4 show photographs of the surface state of the coating film after sliding 2000 m in Example 8. From the surface analysis of S in FIG. 3 and the surface analysis of Si in FIG. 4, a strong composite resin film composed of molybdenum disulfide and silicon nitride is formed by sliding, and silicon nitride forms a bore bearing surface forming effect. In addition, it is understood that excellent abrasion resistance is imparted as reinforcing particles of the film.
【００２１】[0021]
【発明の効果】以上詳述したように本発明の摺動部材用
被覆材は摩擦力の低減、相手材のベアリング面の形成、
皮膜自身の耐摩耗性にきわめて優れている。したがって
自動車用ディーゼルエンジンのＴＯＰリングの外周に本
発明の被覆材を形成すれば運転初期における摩擦力低減
とグリーンボアの表面性状改善によりＴＯＰリング外周
表面処理のクラック、剥離を防止できる。As described above in detail, the coating material for a sliding member of the present invention can reduce the frictional force, form the bearing surface of the mating material,
Extremely excellent wear resistance of the film itself. Therefore, if the coating material of the present invention is formed on the outer periphery of the TOP ring of the automobile diesel engine, cracks and peeling of the outer surface treatment of the TOP ring can be prevented by reducing the frictional force and improving the surface properties of the green bore in the initial operation.
【図１】本発明実施例を示すＴＯＰリングの拡大断面図
である。FIG. 1 is an enlarged sectional view of a TOP ring showing an embodiment of the present invention.
【図２】本発明にかかわる実施例８の評価試験後の表面
ＳＥＭ写真（×１０００）である。FIG. 2 is a surface SEM photograph (× 1000) after an evaluation test of Example 8 according to the present invention.
【図３】図２のＳの面分析写真である。FIG. 3 is a surface analysis photograph of S in FIG. 2;
【図４】図２のＳｉの面分析写真である。FIG. 4 is a surface analysis photograph of Si of FIG. 2;
１：ピストンリング ２：外周表面処理 ３：被覆材 1: Piston ring 2: Outer surface treatment 3: Coating material
Claims (2)
脂の少なくとも1種：４０〜５０ｗｔ％、平均粒径１〜
４μｍの二硫化モリブデン：３５〜５５ｗｔ％、平均粒
径０．５〜２．０μｍの窒化珪素：５〜２０ｗｔ％を成
分とすることを特徴とする摺動部材用被覆組成物。At least one of polyamide imide resin and polyimide resin: 40 to 50 wt%, average particle size 1 to 1
A coating composition for a sliding member, comprising: molybdenum disulfide of 4 μm: 35 to 55 wt%; silicon nitride having an average particle size of 0.5 to 2.0 μm: 5 to 20 wt%.
からなる被覆層が外周面に形成されていることを特徴と
する内燃機関用ピストンリング。2. A piston ring for an internal combustion engine, wherein a coating layer comprising the coating composition for a sliding member according to claim 1 is formed on an outer peripheral surface.
Priority Applications (1)
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|---|---|---|---|
| JP20869799A JP4507028B2 (en) | 1999-07-23 | 1999-07-23 | Coating composition for sliding member and piston ring for internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20869799A JP4507028B2 (en) | 1999-07-23 | 1999-07-23 | Coating composition for sliding member and piston ring for internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001031906A true JP2001031906A (en) | 2001-02-06 |
| JP4507028B2 JP4507028B2 (en) | 2010-07-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20869799A Expired - Fee Related JP4507028B2 (en) | 1999-07-23 | 1999-07-23 | Coating composition for sliding member and piston ring for internal combustion engine |
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Cited By (10)
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|---|---|---|---|---|
| WO2004011793A1 (en) * | 2002-07-25 | 2004-02-05 | Kabushiki Kaisha Riken | Piston ring |
| DE102004057560A1 (en) * | 2004-11-30 | 2006-06-01 | Mahle International Gmbh | Piston ring, useful for a combustion engine, comprises a bearing surface, which is provided with a plastic coating (made of polyamidimidimide and/or polyetheretherketone with stored particles) |
| JP2008248986A (en) * | 2007-03-29 | 2008-10-16 | Nippon Piston Ring Co Ltd | Piston ring |
| JP2009074539A (en) * | 2007-08-24 | 2009-04-09 | Nippon Piston Ring Co Ltd | Piston ring |
| JP2011112034A (en) * | 2009-11-30 | 2011-06-09 | Koyama Garage:Kk | Combustion visualization engine and assembling method of the same |
| WO2011071049A1 (en) * | 2009-12-08 | 2011-06-16 | 株式会社リケン | Piston ring and piston device |
| JP2011162660A (en) * | 2010-02-09 | 2011-08-25 | Honda Motor Co Ltd | Composition for double-layered lubricating film and piston in internal combustion engine |
| JPWO2013039177A1 (en) * | 2011-09-13 | 2015-03-26 | 大豊工業株式会社 | Sliding member and sliding material composition |
| JP2016160293A (en) * | 2015-02-27 | 2016-09-05 | トヨタ自動車株式会社 | Composition for lubricant film, slide member using the same and manufacturing method therefor |
| CN107339370A (en) * | 2017-05-26 | 2017-11-10 | 杭州萧山万隆机械有限公司 | Wear-resisting chain sleeve |
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| WO2004011793A1 (en) * | 2002-07-25 | 2004-02-05 | Kabushiki Kaisha Riken | Piston ring |
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| DE102004057560A1 (en) * | 2004-11-30 | 2006-06-01 | Mahle International Gmbh | Piston ring, useful for a combustion engine, comprises a bearing surface, which is provided with a plastic coating (made of polyamidimidimide and/or polyetheretherketone with stored particles) |
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| JPWO2011071049A1 (en) * | 2009-12-08 | 2013-04-22 | 株式会社リケン | Piston ring and piston device |
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| US9062769B2 (en) | 2009-12-08 | 2015-06-23 | Kabushiki Kaisha Riken | Piston ring and piston device |
| CN102648366B (en) * | 2009-12-08 | 2015-10-14 | 株式会社理研 | Piston ring and piston apparatus |
| JP2011162660A (en) * | 2010-02-09 | 2011-08-25 | Honda Motor Co Ltd | Composition for double-layered lubricating film and piston in internal combustion engine |
| JPWO2013039177A1 (en) * | 2011-09-13 | 2015-03-26 | 大豊工業株式会社 | Sliding member and sliding material composition |
| US9303230B2 (en) | 2011-09-13 | 2016-04-05 | Taiho Kogyo Co., Ltd. | Sliding member and sliding material composition |
| JP2016160293A (en) * | 2015-02-27 | 2016-09-05 | トヨタ自動車株式会社 | Composition for lubricant film, slide member using the same and manufacturing method therefor |
| CN107339370A (en) * | 2017-05-26 | 2017-11-10 | 杭州萧山万隆机械有限公司 | Wear-resisting chain sleeve |
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