JPH0326293Y2 - - Google Patents
Info
- Publication number
- JPH0326293Y2 JPH0326293Y2 JP1984198635U JP19863584U JPH0326293Y2 JP H0326293 Y2 JPH0326293 Y2 JP H0326293Y2 JP 1984198635 U JP1984198635 U JP 1984198635U JP 19863584 U JP19863584 U JP 19863584U JP H0326293 Y2 JPH0326293 Y2 JP H0326293Y2
- Authority
- JP
- Japan
- Prior art keywords
- oil ring
- steel
- ring body
- coil expander
- layer
- 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
Links
Landscapes
- Pistons, Piston Rings, And Cylinders (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は内燃機関エンジン用コイルエキスパン
ダ付鋼製オイルリングに関する。[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a steel oil ring with a coil expander for an internal combustion engine.
コイルエキスパンダ付オイルリングは、現在デ
イーゼルエンジンを主体に一部ガソリンエンジン
でも使用されているが、一般的には鋳鉄製オイル
リング本体、あるいは鋼製オイルリング本体とコ
イルエキスパンダとの組合せで使用されている。
Oil rings with coil expanders are currently used mainly in diesel engines but also in some gasoline engines, but they are generally used with a cast iron oil ring body or a combination of a steel oil ring body and a coil expander. has been done.
そして、シリンダへの追従性などのリング特性
がすぐれてオイル掻き性能の良い鋼製オイルリン
グ本体として、上下のサイドレールを薄肉の柱部
で連結した断面略I字形のものが知られている。
この場合、シリンダ内壁面と接触する外周摺動
面、及びコイルエキスパンダと接触する内周面に
は耐摩耗性の向上を目的として硬質クロムメツキ
を施すことが一般的に行われている。 As a steel oil ring body that has excellent ring properties such as followability to the cylinder and good oil scraping performance, there is a known steel oil ring body that has a substantially I-shaped cross section in which upper and lower side rails are connected by a thin column.
In this case, hard chrome plating is generally applied to the outer circumferential sliding surface that contacts the cylinder inner wall surface and the inner circumferential surface that contacts the coil expander for the purpose of improving wear resistance.
最近のエンジンの高出力化あるいは排気対策面
からターボチヤージヤーあるいはEGR等が採用
されるケースが多くなつてきたが、これに伴つて
ピストンリングへの負荷が高まり、そのため外周
摺動面の摩耗が増加し、従来のクロムメツキリン
グでは耐久性の点で対応しきれなくなつてきてい
る。
In recent years, turbocharging or EGR has been increasingly adopted in order to increase the output of engines or reduce exhaust emissions.As a result, the load on the piston rings increases, resulting in wear and tear on the outer circumferential sliding surface. is increasing, and conventional chrome metal rings are no longer able to meet the demand in terms of durability.
本考案は、上記リング特性にすぐれる断面略I
字形の鋼製オイルリング本体と、コイルエキスパ
ンダの組合せオイルリングについて、耐摩耗性を
向上させることを目的とする。 The present invention has a cross section of approximately I which has excellent ring characteristics as described above.
The objective is to improve the wear resistance of an oil ring that is a combination of a letter-shaped steel oil ring body and a coil expander.
上記目的を達成するための本考案の構成は、上
下のサイドレールを柱部で連結した断面略I字形
の鋼製オイルリング本体と、オイルリング本体を
半径方向外方に付勢するコイルエキスパンダとか
らなるコイルエキスパンダ付鋼製オイルリングに
おいて、前記オイルリング本体が重量比でC0.3〜
0.6%、Si1.5%以下、Cr4.0〜6.0%、Mo0.5〜2.0
%、V0.5〜2.0%、残部が実質的にFeの鋼材より
なり、オイルリング本体表面にガス窒化層のうち
の酸化物層及び白層を除去した硬度Hv700以上で
厚さが30〜110μmの有効窒化層を形成したことを
特徴とする。
In order to achieve the above object, the present invention has a structure including a steel oil ring main body having a substantially I-shaped cross section in which upper and lower side rails are connected by a column, and a coil expander that urges the oil ring main body radially outward. In a steel oil ring with a coil expander, the oil ring body has a weight ratio of C0.3 to
0.6%, Si1.5% or less, Cr4.0~6.0%, Mo0.5~2.0
%, V0.5~2.0%, the balance is essentially made of Fe steel, with a hardness of Hv700 or higher and a thickness of 30~110μm after removing the oxide layer and white layer of the gas nitride layer on the oil ring body surface. It is characterized by forming an effective nitrided layer.
上記鋼材の鋼種の選定要件としては、引抜加
工や圧延加工等によつて上記略I字形断面形状の
条鋼材を作製し、これに所定の加工等を施してオ
イルリング本体を形成するため、複雑な形状に対
して十分な成形加工性を有すること、オイルリ
ング本体表面に厚くて硬いガス窒化層を得ること
ができることであり、上記鋼材成分の限定理由を
下記に示す。 The requirements for selecting the steel type of the above steel material are that the steel bar with the approximately I-shaped cross section is produced by drawing or rolling, and then the oil ring body is formed by performing prescribed processing, etc., so it is complicated. It has sufficient formability for various shapes, and it is possible to obtain a thick and hard gas nitrided layer on the surface of the oil ring main body.The reasons for limiting the above-mentioned steel material components are shown below.
Cは母材の機械的特性、摺動特性を維持するた
めに必要であるが、0.3%未満では機械的特性が
弱く、耐摩耗性が劣化し、0.6%を超えると炭化
物が増加して成形加工が困難となる。Crは母材
の耐熱軟化性、耐摩耗性を向上し、窒化特性を増
すが、4.0%未満では窒化特性が不安定となり、
6.0%を超えると成形加工性が劣化する。Mo、V
は母材の耐熱軟化性を向上し、Crと共に複合炭
化物を形成して耐摩耗性を向上し、更に窒化特性
を向上させるが、0.5%未満では効果不十分で、
2.0%を超えると複合炭化物が多くなり、成形加
工性が劣化する。 C is necessary to maintain the mechanical properties and sliding properties of the base material, but if it is less than 0.3%, the mechanical properties will be weak and wear resistance will deteriorate, and if it exceeds 0.6%, carbides will increase and forming will be difficult. Processing becomes difficult. Cr improves the heat softening resistance and wear resistance of the base metal, and increases the nitriding properties, but if it is less than 4.0%, the nitriding properties become unstable.
If it exceeds 6.0%, moldability deteriorates. Mo, V.
Cr improves the heat softening resistance of the base material, forms composite carbides with Cr, improves wear resistance, and further improves nitriding properties, but if it is less than 0.5%, the effect is insufficient;
If it exceeds 2.0%, the amount of composite carbides increases and moldability deteriorates.
なお、Al(0.3%以下が好ましい。0.3%を超え
ると、鋼塊製造上赤熱脆化の原因となり、また白
点欠陥等の不具合発生の原因となりやすく、更に
窒化効果の働きがなくなる。)、N等を微量に添加
すれば窒化特性は更に向上する。 In addition, Al (0.3% or less is preferable. If it exceeds 0.3%, it will cause red heat embrittlement in the production of steel ingots, and will likely cause defects such as white spot defects, and furthermore, the nitriding effect will not work.) The nitriding properties can be further improved by adding a small amount of N or the like.
また、ガス窒化層のうち表面酸化物層及び白層
は硬くて脆いので除去する。 Furthermore, the surface oxide layer and the white layer of the gas nitrided layer are hard and brittle, so they are removed.
また、表面酸化物層及び白層を除去した有効窒
化層の硬度は耐摩耗、耐焼付性の点でHv700以上
が有効である。 Further, the hardness of the effective nitrided layer from which the surface oxide layer and white layer have been removed is Hv700 or higher in terms of wear resistance and seizure resistance.
また、10万Km以上の走行には30μm以上の厚さ
が有効である。有効窒化層の厚さは耐久性の面で
は厚い方がよいが、窒化層をあまり厚くすると脆
化等による折損、欠け等の不具合を発生するおそ
れがある。この点で110μmでは、脆化等を生ぜ
ず、折損、欠け等を生じない。 Additionally, a thickness of 30 μm or more is effective for driving over 100,000 km. The thicker the effective nitrided layer is, the better in terms of durability, but if the nitrided layer is made too thick, problems such as breakage and chipping may occur due to embrittlement. In this respect, at 110 μm, no embrittlement occurs, and no breakage or chipping occurs.
以下本考案の一実施例を説明する。 An embodiment of the present invention will be described below.
第1図は本考案に係るコイルエキスパンダ付鋼
製オイルリングを示す。 FIG. 1 shows a steel oil ring with a coil expander according to the present invention.
オイルリング本体1は上下のサイドレール2,
3と、これらを連結する薄肉の真直な柱部4とか
らなる断面略I字形のリングで、上下のサイドレ
ール2,3において柱部4よりも外方に突出した
部分2a,3aの外周面が、図示しないシリンダ
内壁面に圧接される摺動面5,6を形成し、柱部
4よりも内方に突出した部分2b,3bの対向す
る傾斜壁面7,8と柱部4の内壁面9とでコイル
エキスパンダ10の嵌装溝11を形成している。
そして、柱部4には円周方向に間隔をおいて多数
のオイル孔が設けられている。 The oil ring body 1 has upper and lower side rails 2,
3 and a thin, straight column 4 that connects these, the ring has a substantially I-shaped cross section. form sliding surfaces 5 and 6 that are pressed against the inner wall surface of the cylinder (not shown), and the opposing inclined wall surfaces 7 and 8 of the portions 2b and 3b that protrude inwardly from the columnar section 4 and the inner wall surface of the columnar section 4. 9 forms a fitting groove 11 for the coil expander 10.
A large number of oil holes are provided in the columnar portion 4 at intervals in the circumferential direction.
コイルエキスパンダ10は環状をなし、上記オ
イルリング本体1の内周の嵌装溝11に配設さ
れ、オイルリング本体1を半径方向外方に押圧付
勢して、上記サイドレール2,3の外周摺動面
5,6をシリンダ内壁面に圧接させる。 The coil expander 10 has an annular shape and is disposed in a fitting groove 11 on the inner circumference of the oil ring main body 1, and presses the oil ring main body 1 radially outward to expand the side rails 2 and 3. The outer peripheral sliding surfaces 5 and 6 are brought into pressure contact with the inner wall surface of the cylinder.
このオイルリング本体1は、重量比でC0.45%、
Si0.9%、Cr5.2%、Mo1.78%、V0.65%、残部が
実質的にFeよりなる鋼線材をダイスで引抜加工
して、第1図に示す断面形状の異形線材を作製
し、この異形線材に所定の加工及び処理を施して
形成したもので、オイルリング本体1の全表面に
はガス窒化処理により生成した窒化層のうちの硬
くて脆い表面酸化物層及び白層を除去した、
Hv700〜1050の硬さの有効窒化層12が110μm形
成されている(第2図参照)。第2図はオイルリ
ング本体1の外周摺動面5,6の表面からの深さ
における硬度を示す。そして有効窒化層12が
110μmでは、脆化等を生ぜず、折損、欠け等を生
じない。 This oil ring body 1 has a weight ratio of C0.45%.
A steel wire rod consisting of 0.9% Si, 5.2% Cr, 1.78% Mo, 0.65% V, and the remainder substantially Fe was drawn with a die to produce a deformed wire rod with the cross-sectional shape shown in Figure 1. The oil ring body 1 is formed by subjecting this irregularly shaped wire to predetermined processing and treatment, and the entire surface of the oil ring body 1 is coated with a hard and brittle surface oxide layer and white layer of the nitrided layer generated by gas nitriding. removed,
An effective nitrided layer 12 having a hardness of 700 to 1050 Hv is formed to a thickness of 110 μm (see FIG. 2). FIG. 2 shows the hardness of the outer peripheral sliding surfaces 5, 6 of the oil ring body 1 at depths from the surface. And the effective nitrided layer 12
At 110 μm, no embrittlement occurs, and no breakage or chipping occurs.
上記本考案リングに対して、比較材として、第
3図に示すように、本考案のオイルリング本体1
と同じ形状、材質で、硬質クロムメツキ20,2
1を外周表面に施した外周摺動面22,23を備
えたオイルリング本体24に、コイルエキスパン
ダ10を装着したものを作製した。 In contrast to the ring of the present invention, as a comparison material, an oil ring body 1 of the present invention, as shown in FIG.
Same shape and material as, hard chrome plating 20.2
A coil expander 10 was attached to an oil ring main body 24 having outer circumferential sliding surfaces 22 and 23 whose outer circumferential surfaces were coated with No. 1.
以上の2つのコイルエキスパンダ付鋼製オイル
リングの高速耐久テストを行つた結果を第4図に
示す。この時使用したエンジンは83φmm、1800
c.c.デイーゼルエンジンで、運転条件は4700rpm×
4/4×300Hrである。 Figure 4 shows the results of a high-speed durability test of the above two steel oil rings with coil expanders. The engine used at this time was 83φmm, 1800
CC diesel engine, operating conditions are 4700rpm×
4/4×300Hr.
第4図から明らかなように、本考案のガス窒化
処理リングの外周摺動面5,6の摩耗量は、比較
材のクロムメツキリングの外周摺動面22,23
の摩耗量に比べて非常に少なく、クロムメツキリ
ングの摩耗量の約1/2である。また、オイルリン
グ本体1,24は本考案、比較材とも、折損、欠
け等の不具合を生じなかつた。 As is clear from FIG. 4, the amount of wear on the outer circumferential sliding surfaces 5 and 6 of the gas nitrided ring of the present invention is greater than that of the outer circumferential sliding surfaces 22 and 23 of the chrome-plated ring of the comparative material.
The amount of wear is very small compared to that of chrome metal rings, and is approximately 1/2 of the amount of wear of chrome metal rings. In addition, the oil ring bodies 1 and 24 of both the present invention and the comparative material did not have any problems such as breakage or chipping.
以上説明したように本考案によれば、断面略I
字形の本考案オイルリング本体を条鋼材の成形加
工により容易に形成できるとともに、オイルリン
グ本体表面に所定の硬さ及び厚さのガス窒化層を
付与することができるので、耐摩耗性にすぐれ、
折損、欠け等のおそれもなく、耐久性に富み、シ
リンダへの追従性などのリング特性にもすぐれた
コイルエキスパンダ付鋼製オイルリングを提供で
きるものである。
As explained above, according to the present invention, the cross section approximately I
The oil ring body of the present invention can be easily formed in the shape of a long steel material, and a gas nitrided layer of a predetermined hardness and thickness can be applied to the surface of the oil ring body, resulting in excellent wear resistance.
It is possible to provide a steel oil ring with a coil expander that is free from breakage, chipping, etc., is highly durable, and has excellent ring characteristics such as followability to a cylinder.
第1図は本考案に係るコイルエキスパンダ付鋼
製オイルリングを示す断面図、第2図は同リング
におけるオイルリング本体の外周摺動面の表面か
らの深さにおける硬度を示すグラフ、第3図は比
較材としてのコイルエキスパンダ付鋼製オイルリ
ングを示す断面図、第4図は高速耐久テストの結
果を示すグラフである。
1はオイルリング本体、2,3はサイドレー
ル、4は柱部、5,6は摺動面、10はコイルエ
キスパンダ、11は嵌装溝、12は有効窒化層。
Fig. 1 is a cross-sectional view showing a steel oil ring with a coil expander according to the present invention, Fig. 2 is a graph showing the hardness of the same ring at a depth from the surface of the outer peripheral sliding surface of the oil ring main body, and Fig. 3 The figure is a sectional view showing a steel oil ring with a coil expander as a comparison material, and FIG. 4 is a graph showing the results of a high-speed durability test. 1 is an oil ring main body, 2 and 3 are side rails, 4 is a pillar portion, 5 and 6 are sliding surfaces, 10 is a coil expander, 11 is a fitting groove, and 12 is an effective nitrided layer.
Claims (1)
字形の鋼製オイルリング本体と、オイルリング本
体を半径方向外方に付勢するコイルエキスパンダ
とからなるコイルエキスパンダ付鋼製オイルリン
グにおいて、前記オイルリング本体が重量比で
C0.3〜0.6%、Si1.5%以下、Cr4.0〜6.0%、Mo0.5
〜2.0%、V0.5〜2.0%、残部が実質的にFeの鋼材
よりなり、オイルリング本体表面にガス窒化層の
うちの酸化物層及び白層を除去した硬度Hv700以
上で厚さが30〜110μmの有効窒化層を形成したこ
とを特徴とするコイルエキスパンダ付鋼製オイル
リング。 Cross section I where the upper and lower side rails are connected by the column part
In a steel oil ring with a coil expander, which is composed of a steel oil ring body shaped like a letter and a coil expander that urges the oil ring body outward in the radial direction, the oil ring body has a weight ratio of
C0.3~0.6%, Si1.5% or less, Cr4.0~6.0%, Mo0.5
~2.0%, V0.5~2.0%, the remainder is essentially Fe steel, with a hardness of Hv700 or higher and a thickness of 30 mm after removing the oxide layer and white layer of the gas nitride layer on the surface of the oil ring body. A steel oil ring with a coil expander characterized by forming an effective nitride layer of ~110μm.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1984198635U JPH0326293Y2 (en) | 1984-12-25 | 1984-12-25 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1984198635U JPH0326293Y2 (en) | 1984-12-25 | 1984-12-25 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS61110853U JPS61110853U (en) | 1986-07-14 |
JPH0326293Y2 true JPH0326293Y2 (en) | 1991-06-06 |
Family
ID=30757809
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1984198635U Expired JPH0326293Y2 (en) | 1984-12-25 | 1984-12-25 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0326293Y2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003074704A (en) * | 2001-08-31 | 2003-03-12 | Riken Corp | Combination oil ring |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4929204A (en) * | 1972-07-14 | 1974-03-15 | ||
JPS57143473A (en) * | 1981-03-03 | 1982-09-04 | Nissan Motor Co Ltd | Manufacture of sliding member |
JPS57203848A (en) * | 1981-06-09 | 1982-12-14 | Nippon Piston Ring Co Ltd | Piston ring made of steel |
-
1984
- 1984-12-25 JP JP1984198635U patent/JPH0326293Y2/ja not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS61110853U (en) | 1986-07-14 |
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