JPS60150462A - Piston ring for internal-combustion engine and manufacture thereof - Google Patents
Piston ring for internal-combustion engine and manufacture thereofInfo
- Publication number
- JPS60150462A JPS60150462A JP468684A JP468684A JPS60150462A JP S60150462 A JPS60150462 A JP S60150462A JP 468684 A JP468684 A JP 468684A JP 468684 A JP468684 A JP 468684A JP S60150462 A JPS60150462 A JP S60150462A
- Authority
- JP
- Japan
- Prior art keywords
- piston ring
- nitrided layer
- treatment
- combustion engine
- nitriding
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
Description
【発明の詳細な説明】
（発明の技術分野）
この発明は耐摩耗性摺動部材とその製造方法に関し、更
に詳しくは内燃機関のピストンリングとその製造方法に
関する。DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) The present invention relates to a wear-resistant sliding member and a method for manufacturing the same, and more particularly to a piston ring for an internal combustion engine and a method for manufacturing the same.
（従来技術と問題点）
従来、内燃機関用ピストンリングの耐摩耗特性を改善す
る手段として、その摺動面に硬質クロムめっき処理や窒
化処理が施されている。(Prior Art and Problems) Conventionally, as a means to improve the wear resistance of piston rings for internal combustion engines, hard chromium plating or nitriding has been applied to the sliding surfaces thereof.
ここで、窒化処理は低コストで耐摩耗性表面が形成でき
る手段として多用されている。Here, nitriding treatment is often used as a means to form a wear-resistant surface at low cost.
しかしながら、窒化処理は５５０℃以上の高温域で施さ
れるのが一般であり、特にピストシリングに窒化処理を
施す場合にはリング母材の硬度低Ｆを防止する必要から
その処理時間は短時間（一般には２時間が限度）とする
必要がり、処理時間が短いと、形成される窒化層の厚さ
が薄く２時間の処理でも窒化深さは６０〜８０μｍ８度
である。However, nitriding treatment is generally performed at a high temperature of 550°C or higher, and in particular, when nitriding piston rings, the treatment time is short because it is necessary to prevent the ring base material from having a low hardness of F. (Generally, 2 hours is the limit). If the treatment time is short, the thickness of the nitrided layer formed is thin, and the nitriding depth is 60 to 80 μm and 8 degrees even after 2 hours of treatment.
このように窒化層の厚さが薄い場合には短時間の使用で
窒化層が消失してしまい部材の耐久性が充分に確保され
ないという難点があり改善が望まれていた。また、苛酷
な使用条ｆ１で使用されるピストンリングでは従来の方
法により形成される窒化層ではなお耐摩耗特性が充分で
はない。When the thickness of the nitrided layer is small as described above, there is a problem that the nitrided layer disappears after a short period of use, making it impossible to ensure sufficient durability of the member, and an improvement has been desired. Furthermore, in piston rings used under severe service conditions f1, the nitrided layer formed by the conventional method still does not have sufficient wear resistance.
（発明の目的）
この発明は、上記に鑑み、耐摩耗特性と耐スカツフ特性
に優れた、改善された表面処理層を有する内燃機関用ピ
ストンリングとその製造方法を提供することを目的とし
てなされたものである。(Object of the Invention) In view of the above, the present invention has been made for the purpose of providing a piston ring for an internal combustion engine having an improved surface treatment layer with excellent wear resistance and scuff resistance, and a method for manufacturing the same. It is something.
（発明の構成および効果）
本発明は、摺動面に窒化層が形成され、該窒化層の少な
くともその表面には四三酸化鉄でなる酸化物層が形成さ
れている内燃機関用ピストンリングに係る。(Configuration and Effects of the Invention) The present invention provides a piston ring for an internal combustion engine, in which a nitrided layer is formed on a sliding surface, and an oxide layer made of triiron tetroxide is formed on at least the surface of the nitrided layer. It depends.
Ｌ配本発明の内燃機関用ピストンリングは、鋼製ピスト
ンリングを１通常のガス窒化処理用雰囲５気に１〜５ｖ
ｏ１％の酸素又は４〜３Ｑｖｏ１％の空気を含む５５０
〜５８０’Ｃの処理雰囲気中で。、５〜４時間処理する
こと（以下、酸窒化処理という。The piston ring for an internal combustion engine of the present invention is a steel piston ring heated in a normal gas nitriding atmosphere of 1 to 5 V.
550 containing o1% oxygen or 4-3Qvo1% air
~580'C in a processing atmosphere. , treatment for 5 to 4 hours (hereinafter referred to as oxynitriding treatment).
）により容易に得ることができる。) can be easily obtained.
また、前記酸窒化処理の後に、５２０〜５５０ ”Ｃで
０．５〜１時間の水蒸気処理を施す場合には表面の酸化
物層をより緻密に・形成させることができピストンリン
グの耐スカツフ特性の改善に特に有効である。。In addition, if a steam treatment is performed at 520 to 550 ''C for 0.5 to 1 hour after the oxynitriding treatment, the oxide layer on the surface can be formed more densely, which improves the scuffing resistance of the piston ring. It is particularly effective for improving.
本発明では鋼製ピストンリングは、」〜５ ｖｏ１％の
酸素又は４〜３０ｖｏ１％の空気を含有するガス窒化処
理雰囲気中で酸窒化処理される。この処理によれば窒化
が促進され、１００ ｐ ｍ以」二の窒化深さも短時間
にして容易に得ることができ、また、窒化層表面には四
三酸化鉄よりなる酸化物が形成されていて耐摩耗性およ
び耐久カップ性に優れ且つ耐久性の良好な内燃機関用ピ
ストン１１ングを得ることができる。In the present invention, steel piston rings are oxynitrided in a gas nitriding atmosphere containing ~5 vol% oxygen or 4-30 vol% air. This treatment promotes nitriding, making it possible to easily obtain a nitriding depth of 100 pm or more in a short period of time.In addition, an oxide consisting of triiron tetroxide is formed on the surface of the nitrided layer. As a result, it is possible to obtain a piston 11 ring for an internal combustion engine which has excellent wear resistance and durability, and has good durability.
さらに、前記酸窒化処理の後１通常の水蒸気処理を施す
ことにより窒化処理層の表面の酸化鉄層がより緻密に形
成されるためにピストンリング摺動面の耐スカツフ特性
が改善される。 本発明方法による場合には、鋼製ピス
トンリングの摺動面に深さが深く目つ表面に四三酸化鉱
層を有する窒化層を短時間で形成することができる。し
たがって、本処理方法は、母材の軟化をできるだけ抑え
ることを必要とするピストンリングの摺動面形成方法と
して特に＃Ｊ’？ｌである。Further, by performing a normal steam treatment after the oxynitriding treatment, the iron oxide layer on the surface of the nitrided layer is formed more densely, so that the scuff resistance of the piston ring sliding surface is improved. In the case of the method of the present invention, a nitrided layer having a trioxide tetroxide layer can be formed on the sliding surface of a steel piston ring in a short time on a deep surface. Therefore, this treatment method is particularly suitable for #J'? as a piston ring sliding surface forming method that requires suppressing the softening of the base material as much as possible. It is l.
従来、マルテンサイト系ステンレス鋼がピストンリング
用材として多用されており、この種のピストンリングの
摺動面に窒化処理が施されが、母材が軟化してしまう関
係で長時間の処理が出来ず、仕いぜい２時間程度が限度
である。この場合、得られる窒化深さは６０〜８０μｍ
程度と浅く、したがって、耐久性が充分ではなかった。Conventionally, martensitic stainless steel has been widely used as a material for piston rings, and although nitriding treatment is applied to the sliding surfaces of this type of piston ring, the treatment cannot be carried out for a long time because the base metal softens. However, the maximum time required is about 2 hours. In this case, the obtained nitriding depth is 60-80 μm
It was shallow and therefore not durable enough.
これに対して本発明方法により得られるピストンリング
は窒化深さが深く月つ窒化層表面には四三酸化鉄でなる
酸化鉄屑を有するものであるために耐摩耗耐スカツフ性
に優れており、また、処理が短時間で行えるので母材の
軟化も少なく抑えることもてきなお１本発明方法では、
ガス窒化処理雰囲気中の！′ｉｌＩ素含有量あるいは空
気含有量が過度に不足であると四三酸化鉄の形成が不足
し、また、これらの含有量が過度に多くなると窒化物の
形成量が不足するので１本発明方法では酸素あるいは空
気の含有量を前記所定の範囲とすることが望ましい。On the other hand, the piston ring obtained by the method of the present invention has a deep nitrided depth and has iron oxide scraps made of triiron tetroxide on the surface of the nitrided layer, so it has excellent wear resistance and scuff resistance. In addition, since the treatment can be carried out in a short time, softening of the base material can be suppressed to a minimum.
In a gas nitriding atmosphere! If the element content or air content is excessively insufficient, the formation of triiron tetroxide will be insufficient, and if these contents are excessively high, the amount of nitrides formed will be insufficient. Therefore, it is desirable that the content of oxygen or air be within the predetermined range.
（実施例）
硬度１（ｖ４００に調質したＩＤ Ｉ Ｎ ＤＯ材（Ｃ
：０．８゜Ｓ、ｔ：０．４．Ｍｎ：０．３．Ｃｒ：１７
．５．Ｖ：０．１．Ｍｏ：１．！、Ｆｅ：残）を、ＮＨ
□ガスでなる通常のガス窒化処理雰囲気に酸素を２．５
ｖｏ１％混合した処理雰囲気中で、処理温度５７０℃、
処理時間９０分で処理し１表面に四三酸化鉄でなる酸化
鉄層を有する窒化層を母材表面に形成し試料１（本発明
品）とした。(Example) ID IN DO material (C
:0.8°S, t:0.4. Mn: 0.3. Cr:17
．． 5. V:0.1. Mo:1. ! , Fe: remainder), NH
□Add 2.5% oxygen to the normal gas nitriding atmosphere
In the processing atmosphere mixed with VO1%, the processing temperature was 570°C,
The sample was treated for 90 minutes to form a nitrided layer having an iron oxide layer made of triiron tetroxide on the surface of the base material, which was designated as Sample 1 (product of the present invention).
比較のために、上記と同じ母材を、シアン塩とシアン酸
塩でなる通常の窒化用塩浴中で、処理、温度を５７０℃
とし、処理時間を９０分および１８０分として処理し母
材表面に窒化処理層を形成し比較材を得た（比較材１お
よび比較材２）。For comparison, the same base material as above was treated in a normal nitriding salt bath consisting of cyanate and cyanate at a temperature of 570°C.
Comparative materials were obtained by forming a nitrided layer on the surface of the base material by processing for 90 minutes and 180 minutes (Comparative Material 1 and Comparative Material 2).
第１図は」、記者試料の表面から内部への硬度分布を示
すグラフである。FIG. 1 is a graph showing the hardness distribution from the surface to the inside of the reporter sample.
第１図から明らかなごとく、従来方法で９０分処理した
比較材１の場合、その窒化深さが７０μＩｎ程度である
の岬こ対して１本発明品の場合、同−処理温度及び時間
であるにかかわらず、その処理層の深さは１． Ｏ０μ
ｍと、１８０分処理の比較材２と同程度に達している。As is clear from Fig. 1, in the case of comparative material 1 treated for 90 minutes using the conventional method, the nitriding depth was approximately 70 μIn, whereas in the case of the product of the present invention, the nitriding depth was the same at the same treatment temperature and time. Regardless, the depth of the processing layer is 1. O0μ
m, reaching the same level as Comparative Material 2 treated for 180 minutes.
また、処理後の母材硬度は、１８０分間処理の比較材２
の場合１（ｖ ３２０であるに対し、本発明品（試料１
）ではＨＶ ３５０であり母材硬度の低ドを少なく抑え
ることができる。それ故、本発明は母材の硬度低下を極
力抑えることを必要とするピストンリングに適用するに
特に有効である。In addition, the hardness of the base material after treatment is as follows: Comparative material 2 treated for 180 minutes
Case 1 (v 320), while the product of the present invention (sample 1)
) has an HV of 350, which makes it possible to suppress low base material hardness. Therefore, the present invention is particularly effective when applied to piston rings that require minimizing the decrease in hardness of the base material.
次に、Ｄ Ｉ Ｎ Ｘ９０ｆｉを母材として上記と同様
にして酸窒化処理を施した後、５５０℃で３０分間の水
蒸気処理を施して試料へとし、耐焼き付き性（耐スカツ
フ性）の試験を行った。試験装置は第２図および第３図
に概要を示すものであって、ステータ（１）に取はずし
可能に取り付けられた直径８０ｍｍの円板（相手材）（
２）の中央には裏側から注油孔（３）を通して潤滑油が
注油される。Next, DIN went. The test equipment is schematically shown in Figures 2 and 3, and consists of a disc (mating material) with a diameter of 80 mm that is removably attached to the stator (1).
2) is filled with lubricating oil from the back side through the oil filling hole (3).
ステータ（１）には図示省略した油圧装置によって図に
おいて右方に向けて所定圧力で押圧力が作用するように
しである。円板（２）に相対向してロータ（４）があり
、図示省略した駆動装置によって所定速度で回転するよ
うにしである。ロータ（４）の円板（２）に対向する端
面に取付けらハた試料保持具（４ａ）には５ ｍ ｍ角
でｉｌ’ｌ＋さｌ Ｏｍｍの試験片（５）が同心円上に
等間隔をなして４個着脱可能に、且つ円板（２）に対接
して正方形端面が摺動するように取付けである。このよ
うな試験装置において、注油孔（３）がら摺動面に所定
給油速度で給油しながら試験片（５）を円板（２）に対
接摺動させ、ステータ（１）に作用する圧力を一定時間
毎に増加させてゆき、試験ノ１（５）と円板（２）との
間に発生するＩｆｅ擦力を、トルク（’ｒ ）としてス
ピンドル（６）を介してロードセル（７）で測定し、ト
ルク（１゛）に急激な増加が発生するときの前記圧力の
値をもって一１スカッフ特性の善し悪しを判定した。A pressing force is applied to the stator (1) at a predetermined pressure toward the right in the figure by a hydraulic device (not shown). A rotor (4) is provided opposite to the disk (2), and is rotated at a predetermined speed by a drive device (not shown). The sample holder (4a) attached to the end face of the rotor (4) facing the disc (2) has test pieces (5) of 5 mm square and il'l + l Omm spaced equally spaced on a concentric circle. The four pieces are removable and are attached so that the square end faces slide against the disc (2). In such a test device, the test piece (5) is slid against the disk (2) while lubricating the sliding surface through the oiling hole (3) at a predetermined lubricating speed, and the pressure acting on the stator (1) is measured. is increased at regular intervals, and the Ife friction force generated between test No. 1 (5) and the disk (2) is converted into torque ('r) and sent to the load cell (7) via the spindle (6). The quality of the scuff characteristics was determined based on the value of the pressure at which a sudden increase in torque (1°) occurred.
試験条件：相手円板材、、、ＦＣ２５材慴動速度、、、
８ｍ／秒
潤滑油及び９．、モータオイル＃３０
供給条ｆ１ 温度 ８０度
３５０〜４００ ｍ ］、 ／分
摺接而圧面、、４０ｋｇ／ａｍ”から
；！り）曲毎にｌｏｋｇ／
Ｃ，Ｉｌｌ ’づつ増加させる。Test conditions: mating disc material, FC25 material sliding speed,...
8m/sec lubricating oil and 9. , Motor oil #30 Supply line f1 Temperature 80 degrees 350-400 m ], /min Slide contact pressure surface, 40 kg/am'' (!ri) Increase by lokg/C, Ill' for each song.
」−記耐スカノフ性テストの結果を第４図に示す。The results of the Sukhanov resistance test are shown in FIG.
なお、水蒸気処理を施さない本発明品（試料Ｂ）および
従来の塩浴窒化処理を施した試料（試料Ｃ）についても
同様にしてテストし結果を第４図に並記した。A product of the present invention (sample B) that was not subjected to steam treatment and a sample that was subjected to conventional salt bath nitriding treatment (sample C) were also tested in the same manner, and the results are also shown in FIG.
第４図より、本発明品（試料△及びＢ）は比較試料（試
７↑０）に比べその耐スカツフ特性が改善されており、
酸窒化処理後に水蒸気処理を施した試ｆ’ｌ Ａの耐ス
カツフ特性が特に改善されていることが明らかである。From Figure 4, the products of the present invention (Samples △ and B) have improved scuff resistance properties compared to the comparative samples (Sample 7↑0).
It is clear that the scuffing resistance of sample f'l A, which was subjected to steam treatment after oxynitriding treatment, was particularly improved.
に述の通りで１本発明は耐摩耗性と耐スカツフ性を特に
必要とする内燃機関用ピストンリンクとして好適なビス
（−ンリングを提供するものである。As described above, the present invention provides a screw ring suitable as a piston link for an internal combustion engine which particularly requires wear resistance and scuff resistance.
第１図は試料表面から内部への硬度分布を示すグラフ図
。第２１ｉｉ８１は耐スカッフ性テスト装置の要部断面
をしめす。第３図は第２図のＩＩＩ〜ＩＩ＋断面を示す
。第４図は耐スカッフ性テスト結果を示すグラフ。
図中： ｉ、、、ステータ
２８０１円板（摺動相手）
３００．注油孔
４３９．ロータ
５０１．試験片
６．１．スピン１−ル
ア０１．ロードセル
出願人 株式会社 リケン
第１図
スカッフ発生面Ｊ′ｆ、−に￥ｃｍ２
第４図
Ｍ］
第２図 第３図FIG. 1 is a graph showing the hardness distribution from the surface of the sample to the inside. No. 21ii81 shows a cross section of the main part of the scuff resistance test device. FIG. 3 shows a section III-II+ of FIG. 2. FIG. 4 is a graph showing the results of the scuff resistance test. In the figure: i, Stator 2801 disk (sliding partner) 300. Lubrication hole 439. Rotor 501. Test piece 6.1. Spin 1-Lua 01. Load cell applicant Riken Co., Ltd. Fig. 1 Scuff generation surface J'f, -¥cm2 Fig. 4 M] Fig. 2 Fig. 3
Claims (1)
、汀つ該窒化処理層の少なくともその外表面に四三酸化
鉄でなる酸化物層が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）ピストシリングを１〜５ｖ０１％の酸素又は４〜３
０ｖｏ１％の空気を含む窒化処理雰囲気中において５５
０〜５８０℃で０．５〜４時間処理することを特徴とす
る摺動面に窒化処理層が形成され、且つ該窒化処理層の
少なくとも外表面に四三酸化鉄でなる酸化物層が形成さ
れている内燃機関用ピストンリングの製造方法。 ３）ピストンリングを１〜５ｖｏ１％の酸素又は４〜３
０ｖｏ１％の空気を含むの窒化処理雰囲気中において５
５０〜５８０℃で０．５〜４時間処理した後に５２０〜
５５０℃で０．１〜１時間の水蒸気処理を施すことを特
徴とする、摺動面に窒化処理層が形成され１つ該窒化処
理層の少なくとも外表面に四三酸化鉄でなる酸化物層が
形成されている耐摩耗性摺動部材の製造力ｄ；。[Claims] ]) A nitrided layer is formed on the sliding surface of the piston ring, and an oxide layer made of triiron tetroxide is formed on at least the outer surface of the nitrided layer. A piston ring for internal combustion engines characterized by: 2) Pistols 1-5v01% oxygen or 4-3
55 in a nitriding atmosphere containing 0vo1% air.
A nitrided layer is formed on the sliding surface, which is treated at 0 to 580°C for 0.5 to 4 hours, and an oxide layer made of triiron tetroxide is formed on at least the outer surface of the nitrided layer. A method of manufacturing piston rings for internal combustion engines. 3) Piston ring with 1-5vo1% oxygen or 4-3
5 in a nitriding atmosphere containing 0vo1% air.
520~ after processing at 50~580℃ for 0.5~4 hours
A nitrided layer is formed on the sliding surface, and an oxide layer made of triiron tetroxide is formed on at least the outer surface of the nitrided layer, characterized by subjecting it to steam treatment at 550°C for 0.1 to 1 hour. Manufacturing force d of the wear-resistant sliding member in which .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP468684A JPS60150462A (en) | 1984-01-17 | 1984-01-17 | Piston ring for internal-combustion engine and manufacture thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP468684A JPS60150462A (en) | 1984-01-17 | 1984-01-17 | Piston ring for internal-combustion engine and manufacture thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60150462A true JPS60150462A (en) | 1985-08-08 |
| JPH0148388B2 JPH0148388B2 (en) | 1989-10-19 |
Family
ID=11590773
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP468684A Granted JPS60150462A (en) | 1984-01-17 | 1984-01-17 | Piston ring for internal-combustion engine and manufacture thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60150462A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60153455A (en) * | 1984-01-23 | 1985-08-12 | Nippon Piston Ring Co Ltd | Steel piston ring |
| US5165870A (en) * | 1990-05-30 | 1992-11-24 | Kabushiki Kaisha Toshiba | Refrigerant compressor |
| JPH07317678A (en) * | 1995-06-14 | 1995-12-05 | Hitachi Ltd | Rotary compressor and manufacture of sliding structural part used for it |
| US6726216B2 (en) * | 2001-06-01 | 2004-04-27 | Federal-Mogul Friedberg Gmbh | Piston ring with oxide-nitride composite layer |
-
1984
- 1984-01-17 JP JP468684A patent/JPS60150462A/en active Granted
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60153455A (en) * | 1984-01-23 | 1985-08-12 | Nippon Piston Ring Co Ltd | Steel piston ring |
| JPH0457863B2 (en) * | 1984-01-23 | 1992-09-14 | Nippon Piston Ring Co Ltd | |
| US5165870A (en) * | 1990-05-30 | 1992-11-24 | Kabushiki Kaisha Toshiba | Refrigerant compressor |
| JPH07317678A (en) * | 1995-06-14 | 1995-12-05 | Hitachi Ltd | Rotary compressor and manufacture of sliding structural part used for it |
| US6726216B2 (en) * | 2001-06-01 | 2004-04-27 | Federal-Mogul Friedberg Gmbh | Piston ring with oxide-nitride composite layer |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0148388B2 (en) | 1989-10-19 |
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