JPH0289876A - Piston ring - Google Patents
Piston ringInfo
- Publication number
- JPH0289876A JPH0289876A JP24158588A JP24158588A JPH0289876A JP H0289876 A JPH0289876 A JP H0289876A JP 24158588 A JP24158588 A JP 24158588A JP 24158588 A JP24158588 A JP 24158588A JP H0289876 A JPH0289876 A JP H0289876A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- piston ring
- titanium nitride
- plating
- property
- 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
Links
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000007747 plating Methods 0.000 claims abstract description 23
- 239000002131 composite material Substances 0.000 claims abstract description 19
- 229910052581 Si3N4 Inorganic materials 0.000 claims abstract description 16
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000007733 ion plating Methods 0.000 claims abstract description 12
- 238000002485 combustion reaction Methods 0.000 claims abstract description 8
- 229910001096 P alloy Inorganic materials 0.000 claims description 6
- IGOJDKCIHXGPTI-UHFFFAOYSA-N [P].[Co].[Ni] Chemical compound [P].[Co].[Ni] IGOJDKCIHXGPTI-UHFFFAOYSA-N 0.000 claims description 6
- 239000002245 particle Substances 0.000 abstract description 16
- 239000000463 material Substances 0.000 abstract description 11
- 239000006185 dispersion Substances 0.000 abstract description 6
- 230000002093 peripheral effect Effects 0.000 abstract description 6
- 229910045601 alloy Inorganic materials 0.000 abstract description 3
- 239000000956 alloy Substances 0.000 abstract description 3
- 230000009977 dual effect Effects 0.000 abstract description 2
- 239000012528 membrane Substances 0.000 abstract 3
- 239000010410 layer Substances 0.000 description 34
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 8
- 230000000694 effects Effects 0.000 description 8
- 229910052698 phosphorus Inorganic materials 0.000 description 8
- 239000011574 phosphorus Substances 0.000 description 8
- 239000010936 titanium Substances 0.000 description 7
- 229910052719 titanium Inorganic materials 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 6
- 239000003921 oil Substances 0.000 description 6
- 239000007789 gas Substances 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 239000010941 cobalt Substances 0.000 description 4
- 229910017052 cobalt Inorganic materials 0.000 description 4
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 4
- 229910001873 dinitrogen Inorganic materials 0.000 description 4
- 230000008020 evaporation Effects 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- -1 phosphorus compound Chemical class 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- 150000001869 cobalt compounds Chemical class 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000010894 electron beam technology Methods 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 150000002816 nickel compounds Chemical class 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- IIACRCGMVDHOTQ-UHFFFAOYSA-M sulfamate Chemical compound NS([O-])(=O)=O IIACRCGMVDHOTQ-UHFFFAOYSA-M 0.000 description 1
- 239000013077 target material Substances 0.000 description 1
- ISIJQEHRDSCQIU-UHFFFAOYSA-N tert-butyl 2,7-diazaspiro[4.5]decane-7-carboxylate Chemical compound C1N(C(=O)OC(C)(C)C)CCCC11CNCC1 ISIJQEHRDSCQIU-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、イオンプレーティングによる窒化チタン層と
複合分散めっき層との二重構造を摺動面に有する内燃機
関用ピストンリングに係り、特にンリングとの初期なじ
み性が良く、かつ耐摩耗性に優れたピストンリングに関
する。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a piston ring for an internal combustion engine having a dual structure of a titanium nitride layer formed by ion plating and a composite dispersion plating layer on its sliding surface. This invention relates to a piston ring that has good initial compatibility with a piston ring and has excellent wear resistance.
近年、エンジンの小型軽量化、高出力化などの高性能化
に伴い、ピストンリングに要求されル条件はますます過
酷なものとなり、耐摩耗性はもちろんのこと、耐焼付性
、耐折損性などさまざまな観点から改良が加えられてい
る。In recent years, as engines have become smaller and lighter, and have higher performance such as higher output, the conditions required for piston rings have become increasingly severe. Improvements have been made from various perspectives.
ところで、一般に組み立て直後のエンジンにおいては、
部品製作の精度上の制約からピストンリングとンリング
の大きさに誤差が生ずることは避けられず、両者間に隙
間が生じる。この隙間が存在したままの状態でエンジン
を運転すると、燃焼室の気密がやぶれ、クランク室への
ガスの吹き抜け（圧縮洩れ）が起こる。そしてこのガス
の吹き抜けは／リンダ内面を一様に覆っている潤滑油膜
を破るために、ピストンリングとシリンダ間に異常摩耗
を引き起こし、スカッフィングを発生させたりする。ま
た同時に、この隙間を通して潤滑オイルが燃焼室に入り
込み、オイル消費量も多くなる。By the way, in general, in an engine immediately after assembly,
Due to restrictions on precision in manufacturing parts, it is inevitable that errors will occur in the sizes of the piston rings, and a gap will be created between the two. If the engine is operated with this gap still present, the airtightness of the combustion chamber will be broken and gas will blow through (compression leak) into the crank chamber. This gas blow-through breaks the lubricating oil film that uniformly covers the inner surface of the cylinder, causing abnormal wear between the piston ring and the cylinder, resulting in scuffing. At the same time, lubricating oil enters the combustion chamber through this gap, increasing oil consumption.
従って、なじみ運転と呼ばれるエンジン組み立て直後の
初期運転では、ピストンリングとシリンダの共摺りを行
うことにより短期間のうちに両者の隙間を無くし、早く
両者をなじませる必要があるっ
一般に耐摩耗性に優れたピストンリングは高い硬度の摺
動面を有することになるので、このなじみ運転の期間が
長くなる傾向がある。このため短期間にピストンリング
とシリンダをなじませる工夫としてピストンリングの外
周摺動面上に錫めっきなどの軟質皮膜層を設ける方法や
、リングの断面をテーバ上に加工したりする方法が採ら
れている。Therefore, during the initial operation immediately after engine assembly, which is called break-in operation, it is necessary to eliminate the gap between the piston ring and cylinder in a short period of time by rubbing together the piston ring and cylinder, and to quickly get used to the two. Since a superior piston ring has a highly hard sliding surface, the break-in period tends to be long. Therefore, in order to make the piston ring and cylinder fit together in a short period of time, methods such as providing a soft coating layer such as tin plating on the outer circumferential sliding surface of the piston ring and machining the cross section of the ring into a tapered shape have been adopted. ing.
し発明が解決しようとする課題〕
しかしながら、この錫めっきを施す方法は、高温、高負
荷の条件では絡めつき層が軟らかすぎるために始動初期
の段階で簡単に摩滅してしまい、なじみの効果がほとん
どなくなる。またリングの外周摺動面にテーバをつける
方法は、テーバの角度が燃焼室の気密性、及びンリンダ
内周面の保油性に影響を与えるという問題がある。[Problems to be Solved by the Invention] However, with this method of applying tin plating, the entangled layer is too soft under conditions of high temperature and high load, so it is easily worn away at the initial stage of startup, and the breaking-in effect is not effective. It almost disappears. Furthermore, the method of attaching a taper to the outer peripheral sliding surface of the ring has a problem in that the angle of the taper affects the airtightness of the combustion chamber and the oil retention of the inner peripheral surface of the cylinder.
従って、本発明の目的は、高温、高負荷の条件でも初期
なじみ性が良く、メカ１フイングも発生せず、比較的短
期間になじみ運転が終了し、しかも耐摩耗性の優れたピ
ストンリングを提供することである。Therefore, the object of the present invention is to provide a piston ring that has good initial break-in properties even under high temperature and high load conditions, does not cause mechanical flapping, finishes break-in operation in a relatively short period of time, and has excellent wear resistance. It is to provide.
本発明者は、上記目的を達成すべく鋭意検討を重ねた結
果、耐摩耗性に優れた窒化チタン皮膜層上に適度の硬度
を有する複合分散めっき層を形成することにより、良好
な初期なじみ性を有し、かつ耐摩耗性にも優れたピスト
ンリングを提供できることを発見し、本発明を完成した
。As a result of extensive studies to achieve the above object, the inventors of the present invention have found that by forming a composite dispersion plating layer with appropriate hardness on a titanium nitride film layer with excellent wear resistance, good initial conformability can be achieved. The present invention was completed based on the discovery that it is possible to provide a piston ring that has the following characteristics and also has excellent wear resistance.
すなわち、本発明の内燃機関用ピストンリングは、少な
くともその外周摺動面に、第１層として反応性イオンプ
レーティングによる窒化チタン層が、第２層として窒化
珪素粒子分散ニッケル−コバルト−燐合金複合めっき層
が順に形成されてなる二重構造の層を有することを特徴
とする。That is, the piston ring for an internal combustion engine of the present invention has a titanium nitride layer formed by reactive ion plating as the first layer and a nickel-cobalt-phosphorus alloy composite with silicon nitride particles dispersed therein as the second layer on at least its outer peripheral sliding surface. It is characterized by having a double layer structure in which plating layers are formed in sequence.
本発明の二重構造のピストンリング皮膜においては、上
層（第２層）の窒化珪素粒子分散複合めっき皮膜は、下
層（第１層）の窒化チタン層より幾分軟らかい材質であ
るので、エンジンの始動初期におけるシリンダとのなじ
みが良好であると同時に、急速に摩耗することがない。In the double-structured piston ring coating of the present invention, the upper layer (second layer) of the silicon nitride particle dispersed composite plating coating is made of a somewhat softer material than the lower layer (first layer) of the titanium nitride layer. It fits well with the cylinder at the initial stage of startup, and at the same time does not wear out rapidly.
また下層（第１層）の窒化チタン皮膜は高い硬度を有し
ているので、長期間（上層の摩耗後でも）良好な耐摩耗
性を維持することができる。Furthermore, since the lower layer (first layer) titanium nitride film has high hardness, good wear resistance can be maintained for a long period of time (even after the upper layer is worn).
本発明を以下の実施例により添付図面を参照にして詳細
に説明する。The invention will be explained in detail by means of the following examples and with reference to the accompanying drawings.
第１図は、本発明の一実施例による内燃機関用ピストン
リングの断面図である。本実施例にふいては、ピストン
リングｌの外周摺動面に、窒化チタン層２と窒化珪素粒
子分散ニッケル−コバルト−燐合金複合めっき層３とが
二重構造となるように形成されている。FIG. 1 is a sectional view of a piston ring for an internal combustion engine according to an embodiment of the present invention. In this embodiment, a titanium nitride layer 2 and a nickel-cobalt-phosphorus alloy composite plating layer 3 in which silicon nitride particles are dispersed are formed on the outer peripheral sliding surface of the piston ring 1 so as to have a double structure. .
第１層の窒化チタン（ＴｉＮ）皮膜は、窒素ガスの存在
する減圧霊囲気中で金属チタンをターゲツト材として反
応性イオンプレーティングを行うことで得ることができ
る。反応性イオンプレーティングにおいて、金属チタン
は原子状になり、チタン原子の一部は窒素と反応して窒
化チタンとなる。The first layer of titanium nitride (TiN) film can be obtained by performing reactive ion plating using metallic titanium as a target material in a reduced pressure atmosphere in the presence of nitrogen gas. In reactive ion plating, metallic titanium becomes atomic, and some of the titanium atoms react with nitrogen to form titanium nitride.
窒化チタン皮膜は硬度が高く、耐摩耗性に富む。Titanium nitride film has high hardness and excellent wear resistance.
ＴｉＮ層皮膜の厚さは１０〜３０μｍであればよい。The thickness of the TiN layer film may be 10 to 30 μm.
なお窒化チタンの皮膜は、第２図に示すイオンプレーテ
ィング装置を用いて、形成することができる。第２図の
装置において、ピストンリング母材４の下方には、蒸発
源の金属チタン８を収容する水冷式銅製ルツボ９が設置
してあり、真空容器７の側壁には、ＨＣＤ型電子銃１１
及び雰囲気ガス導入用のバイブ１２が取りつけられてお
り、また電子銃１１から射出される電子ビームを蒸発源
の金、萬チタン８に照射するように、ルツボ９の上には
収束コイル１０が設置されている。この装置を用いて、
ピストンリング母材４を母材保持具５で保持し、ヒータ
ー７でピストンリング母材４を所定の温度に加熱する。Note that the titanium nitride film can be formed using an ion plating apparatus shown in FIG. In the apparatus shown in FIG. 2, a water-cooled copper crucible 9 containing titanium metal 8 as an evaporation source is installed below the piston ring base material 4, and an HCD type electron gun 11 is installed on the side wall of the vacuum vessel 7.
A vibrator 12 for introducing atmospheric gas is attached, and a converging coil 10 is installed above the crucible 9 so that the electron beam emitted from the electron gun 11 is irradiated onto the gold and titanium 8 serving as the evaporation source. has been done. Using this device,
A piston ring base material 4 is held by a base material holder 5, and a heater 7 heats the piston ring base material 4 to a predetermined temperature.
このとき真空ｗＩＴ内は真空ポンプ（図示せず）により
減圧状態にする。At this time, the pressure inside the vacuum wIT is reduced by a vacuum pump (not shown).
窒化チタン皮膜は硬度が高すぎるために初期なじみ性に
劣るので、この欠点を補うために、第２層として窒化珪
素粒子分散ニッケルーコバルトーリン合金複合めっき皮
膜を第１＠上に形成する。Since the titanium nitride film has too high hardness and has poor initial conformability, in order to compensate for this defect, a nickel-cobalt phosphorus alloy composite plating film in which silicon nitride particles are dispersed is formed as a second layer on the first layer.
複合皮膜中に含まれる燐は、皮膜の硬度を高め、耐摩耗
性、耐焼付性に対し優れた効果を示し、また基地の耐食
性も向上する。燐を含有するめっき皮膜の硬度は熱処理
により向上するので、熱処理温度を適切に選ぶことによ
り、良好な初期なじみ性を得るのに適した硬度（Ｈ１７
７００〜９００）とすることができる。しかし燐の量が
１重量％以下では熱処理を行っても硬度が）１ＭＶ７０
０ Ｅ上にならず、耐摩耗性、耐スカツフ性の効果は少
ない。また１０重量％を超えると硬度は増すが脆くなり
、衝撃強度も低下する。従って燐の量は１〜１０重量％
とするのが良い、より好ましい燐の含有量は４〜７重量
％である。Phosphorus contained in the composite film increases the hardness of the film, exhibits excellent effects on wear resistance and seizure resistance, and also improves the corrosion resistance of the base. The hardness of the plating film containing phosphorus is improved by heat treatment, so by appropriately selecting the heat treatment temperature, the hardness suitable for obtaining good initial conformability (H17
700-900). However, if the amount of phosphorus is less than 1% by weight, the hardness will decrease to 1MV70 even after heat treatment.
It does not exceed 0 E and has little effect on abrasion resistance and scuff resistance. Moreover, if it exceeds 10% by weight, the hardness will increase, but it will become brittle and the impact strength will also decrease. Therefore, the amount of phosphorus is 1 to 10% by weight.
The phosphorus content is preferably 4 to 7% by weight.
コバルトはめっき合金基地の耐熱性、耐食性を改善する
とともに皮膜の圧壊疲労強度も向上させる。合金基地中
のコバルトの量は１０重量％以下では上記の効果が顕著
に得られず、また４０重量％を超えてもその効果に著し
い変化はないので、１０〜４０重量％とするのが良い。Cobalt improves the heat resistance and corrosion resistance of the plating alloy base, and also improves the crush fatigue strength of the coating. If the amount of cobalt in the alloy matrix is less than 10% by weight, the above effects cannot be obtained significantly, and even if it exceeds 40% by weight, there is no significant change in the effect, so it is preferable to set the amount of cobalt to 10 to 40% by weight. .
より好ましいコバルトの含有量は２０〜３０重屯％であ
る。A more preferable cobalt content is 20 to 30% by weight.
窒化珪素粒子は燐とともに皮膜の耐摩耗性の向上に優れ
た効果を示す。また窒化珪素は金属との濡れ性が低いの
で、耐焼付性、耐スカツフ性の改善にも寄与する。窒化
珪素の量は５〜３０容量％で、その平均粒径は０．５〜
５μｍが良い。容量が５％未満あるいは粒子が０．５
μｍ未満では基地表面に占める窒化珪素の面積が少なく
、耐摩耗性、耐スカツフ性の向上効果が少ない。また容
量が３０％を超えるか粒径が５μｍを超えると相手材の
摩耗を大きくすることとなり、さらに複合皮膜の強度も
低下する。より好ましくは、窒化珪素粒子の平均粒径は
０．８〜１．２μｍで、含有量は１５〜２５容量％であ
る。Silicon nitride particles, together with phosphorus, have an excellent effect on improving the wear resistance of the coating. Furthermore, since silicon nitride has low wettability with metal, it also contributes to improving seizure resistance and scuffing resistance. The amount of silicon nitride is 5-30% by volume, and its average particle size is 0.5-30% by volume.
5 μm is good. Volume less than 5% or particles 0.5
If it is less than μm, the area occupied by silicon nitride on the base surface is small, and the effect of improving wear resistance and scuff resistance is small. Moreover, if the capacity exceeds 30% or the particle size exceeds 5 μm, the wear of the mating material will increase, and the strength of the composite film will also decrease. More preferably, the average particle size of the silicon nitride particles is 0.8 to 1.2 μm, and the content is 15 to 25% by volume.
複合めっき皮膜の形成には、上記所望の組成となるよう
にニッケル化合物、コバルト化合物及び燐化合物を溶解
させためっき浴中に窒化珪素粒子を分散させたものを使
用する。ニッケル化合物及びコバルト化合物としては硫
酸塩、スルファミン酸塩等を用い、燐化合物としては燐
酸、亜燐酸等を用いる。For forming a composite plating film, silicon nitride particles are dispersed in a plating bath in which a nickel compound, a cobalt compound, and a phosphorus compound are dissolved so as to have the desired composition. As the nickel compound and cobalt compound, sulfate, sulfamate, etc. are used, and as the phosphorus compound, phosphoric acid, phosphorous acid, etc. are used.
得られた複合めっき皮膜は水洗、乾燥後、必要に応じて
熱処理を行う。熱処理温度は３５０〜４００℃程度で、
時間は１〜２時間である。熱処理により複合皮膜の基地
が硬化し良好な初期なじみ性を得るのに適した硬度の複
合皮膜が得られる。The obtained composite plating film is washed with water, dried, and then heat treated if necessary. The heat treatment temperature is about 350-400℃,
The time is 1 to 2 hours. The base of the composite film is hardened by the heat treatment, and a composite film having a hardness suitable for obtaining good initial conformability is obtained.
本発明を以下の実施例によりさらに詳細に説明する。The present invention will be explained in further detail by the following examples.
実施例１
ピスト／リング外周摺動面に第１層として窒化チタン皮
膜を形成する第１の工程と、第２層として第１層上に複
合分散袷つき層を形成する第２の工程と、得られた二重
構造の層に熱処理を施こす第３の工程により、皮膜を形
成した。Example 1 A first step of forming a titanium nitride film as a first layer on the piston/ring outer circumferential sliding surface, a second step of forming a composite dispersed lining layer on the first layer as a second layer, A film was formed by a third step of heat-treating the resulting double-structured layer.
まず第１の工程では、第２図に示す・イオンプレーティ
ング装置により、呼び径ｘ幅×厚さが７７ｍｍ×１．５
市×３．１酩のＳ Ｋ Ｄ−６１材のピストンリングを
央数本まとめて母材ｌとして、以下の条件で反応性イオ
ンプレーティングを実施した。First, in the first step, the nominal diameter x width x thickness is 77 mm x 1.5 mm using the ion plating equipment shown in Figure 2.
Reactive ion plating was carried out under the following conditions using several piston rings made of S K D-61 material of 3.1 mm as the base material 1.
母材温度：４００ ℃
電子ビーム出カニ ３５Ｖ−５００＾窒素ガス分圧二
開始〜１分 ０
１分〜５０分 ５ Ｘｌ０−’ｔｏｒｒアルゴンガス分
圧： ５ ｘｌＯ−’ｔｏｒｒ蒸発源： 金属
チタン
母材バイアス： −１００Ｖ
初めは窒素ガスを導入せずにイオンプレーティングを行
って金属チタンの下地層を形成し、１分経過後から窒素
ガスを導入して窒化チタンの皮膜層を形成した。皮膜の
厚さは約１０μｍであった。Base material temperature: 400 °C Electron beam output 35V-500^ Nitrogen gas partial pressure 2 Start ~ 1 minute 0 1 minute ~ 50 minutes 5 Xl0-'torr Argon gas partial pressure: 5 xlO-'torr Evaporation source: Metallic titanium matrix Material bias: -100V Initially, ion plating was performed without introducing nitrogen gas to form a base layer of metallic titanium, and after 1 minute, nitrogen gas was introduced to form a film layer of titanium nitride. The thickness of the film was approximately 10 μm.
第２の工程として、上記イオンプレーティングによって
得られた窒化チタン皮膜を表面に有するピストンリング
を下記組成を有するめっき浴中に浸漬し、めっき浴温度
６０℃、ｐＨ４、電流密度ｌＯ＾／ｄｍ２で３分間電流
を流して、電気めっきを行った。As the second step, the piston ring having the titanium nitride film on its surface obtained by the above ion plating was immersed in a plating bath having the following composition, and the plating bath temperature was 60°C, pH 4, and current density lO^/dm2. Electroplating was performed by applying a current for 3 minutes.
成 窒化珪素粒子 ６０ｇ／β■１゛
″″″−””Ｒ、”： ’ｆ；ｆ、？４”°“ゴこの第
２工程により得られた第二層の複合めっき皮膜の草さは
約５μｍであった。Silicon nitride particles 60g/β■1゛″″″−””R,”: 'f;f,? The width of the second layer composite plating film obtained in the second step of 4"°" was approximately 5 μm.
次に第３工程として得られた二重構造の皮膜に３１］
０ ℃で１時間の熱処理を施し、皮膜を硬化させた。こ
のときの硬度はＨ＆（Ｖ ７０ Ｑであった。Next, in the third step, the double-structured film obtained
Heat treatment was performed at 0° C. for 1 hour to harden the film. The hardness at this time was H&(V 70 Q).
実機試験
４サイクル水冷４気筒１３００ｃｃエンジン用のアルミ
ニウム合金製エンジンシリンダに、上記ピストンリ〕・
グを組み込み、７５００ｒｐｍ全負荷で１００ 時間の
ペンチテストを行い、オイル消費量を測定した。Actual machine test The above piston cylinder was installed on an aluminum alloy engine cylinder for a 4-cycle water-cooled 4-cylinder 1300cc engine.
A pliers test was conducted for 100 hours at 7,500 rpm and full load to measure oil consumption.
比較例１
また比較のため、ピストンリングの外周摺動面に窒化チ
タン皮膜のみを形成したピストンリングを用いて実施例
１と同様に実機試験を行い、オイル消費量を測定した。Comparative Example 1 For comparison, an actual machine test was conducted in the same manner as in Example 1 using a piston ring in which only a titanium nitride film was formed on the outer peripheral sliding surface of the piston ring, and the oil consumption was measured.
試験結果を第３図に示す。The test results are shown in Figure 3.
第３図から明らかなように本発明のピストンリングは、
窒化チタン皮膜のみを摺動面に有するピストンリングに
比べて、初期の時点からオイルの消費量が少なくなって
いることがわかる。これはピストンリングとシリンダと
の隙間が短時間で消失していくため、すなわち初期なじ
み性が良いためである。As is clear from FIG. 3, the piston ring of the present invention is
It can be seen that the amount of oil consumed is lower from the beginning compared to a piston ring that has only a titanium nitride film on its sliding surface. This is because the gap between the piston ring and the cylinder disappears in a short time, that is, the initial conformability is good.
また実施例では、ヌカソフィングも全く認められなかっ
た。Further, in the examples, no sagging was observed at all.
以上詳述した通り、窒化チタン層と窒化珪素粒子分散ニ
ッケル−コバルト−燐合金複合めっき層とを外周摺動面
に有する本発明のピストンリングは、複合分散めっき皮
膜により初期なじみ性、耐スカツフ性に優れ、また窒化
チタン皮膜により長期耐摩耗性に優れている。As detailed above, the piston ring of the present invention, which has a titanium nitride layer and a nickel-cobalt-phosphorus alloy composite plating layer in which silicon nitride particles are dispersed, on the outer sliding surface, has excellent initial conformability and scuff resistance due to the composite dispersion plating film. It also has excellent long-term wear resistance due to the titanium nitride film.
第１図は本発明の一実施例によるピストンリングの断面
図であり、
第２図は本発明に使用するイオンプレーティング装置の
一例を示す概略図であり、
第３図は実施例１及び比較例１のピストンリングにおい
て試験時間とオイル消費量との関係を示すグラフである
。
■・ ・ ・ピストンリング
２・・・窒化チタン皮膜
３・・・窒化珪素粒子分散ニッケル−コバルト−燐合金
複合めっき皮膜
４・・・母材（ピストンリング）
５・・・母材保持具
６・・・ヒーター
７・・・真空容器
８・・・金属チタン
９・・・水冷銅ルツボ
ｌＯ・・・収束コイル
１１・・・）（ＣＤ電子銃
１２ ・
・男囲気ガス導入用のバイブ
出 願 人 株 式 会 社 リ
ケ ン代 理 人 弁 理 士 高
石 橘 馬第３図FIG. 1 is a sectional view of a piston ring according to an embodiment of the present invention, FIG. 2 is a schematic diagram showing an example of an ion plating device used in the present invention, and FIG. 2 is a graph showing the relationship between test time and oil consumption in the piston ring of Example 1. ■・・・Piston ring 2...Titanium nitride film 3...Silicon nitride particle dispersed nickel-cobalt-phosphorus alloy composite plating film 4...Base material (piston ring) 5...Base metal holder 6. ... Heater 7 ... Vacuum container 8 ... Metal titanium 9 ... Water-cooled copper crucible lO ... Convergence coil 11 ...) (CD electron gun 12 ... Vibrator for introducing gas into the male enclosure) Applicant Re Co., Ltd.
Ken Attorney Patent Attorney Takaishi Tachibana Uma Figure 3
Claims (1)
ングによる窒化チタン層と、前記窒化チタン層の上に形
成された窒化珪素粒子分散ニッケル−コバルト−燐合金
複合めっき層とからなる二重構造の層を有することを特
徴とする内燃機関用ピストンリング。At least on the outer sliding surface thereof, a double-structured layer consisting of a titanium nitride layer formed by reactive ion plating and a silicon nitride particle-dispersed nickel-cobalt-phosphorus alloy composite plating layer formed on the titanium nitride layer. A piston ring for an internal combustion engine, comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24158588A JPH0289876A (en) | 1988-09-27 | 1988-09-27 | Piston ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24158588A JPH0289876A (en) | 1988-09-27 | 1988-09-27 | Piston ring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0289876A true JPH0289876A (en) | 1990-03-29 |
Family
ID=17076500
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24158588A Pending JPH0289876A (en) | 1988-09-27 | 1988-09-27 | Piston ring |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0289876A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015056450A1 (en) * | 2013-10-18 | 2015-04-23 | 株式会社リケン | Piston ring for internal combustion engine |
| JP2015102188A (en) * | 2013-11-26 | 2015-06-04 | 株式会社リケン | Piston ring for internal combustion engine |
-
1988
- 1988-09-27 JP JP24158588A patent/JPH0289876A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015056450A1 (en) * | 2013-10-18 | 2015-04-23 | 株式会社リケン | Piston ring for internal combustion engine |
| US9920836B2 (en) | 2013-10-18 | 2018-03-20 | Kabushiki Kaisha Riken | Piston ring for internal combustion engine |
| JP2015102188A (en) * | 2013-11-26 | 2015-06-04 | 株式会社リケン | Piston ring for internal combustion engine |
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