JP2970387B2 - Wear-resistant steel and piston ring or liner materials for internal combustion engines - Google Patents
Wear-resistant steel and piston ring or liner materials for internal combustion enginesInfo
- Publication number
- JP2970387B2 JP2970387B2 JP6050367A JP5036794A JP2970387B2 JP 2970387 B2 JP2970387 B2 JP 2970387B2 JP 6050367 A JP6050367 A JP 6050367A JP 5036794 A JP5036794 A JP 5036794A JP 2970387 B2 JP2970387 B2 JP 2970387B2
- Authority
- JP
- Japan
- Prior art keywords
- weight
- wear
- resistant steel
- less
- internal combustion
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2203/00—Non-metallic inorganic materials
- F05C2203/04—Phosphor
Landscapes
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は耐摩耗性鋼及び内燃機関
のピストンリング材料又はライナー材料に係り、特に、
耐摩耗性、耐スカッフ性に優れる耐摩耗性鋼であって、
鋳鉄に比べて強度が高く、伸びが大きい上に、超強力
鋼、超硬合金に比べて靭性が高く、加工性も良好な高特
性耐摩耗性鋼及び内燃機関のピストンリング材料又はラ
イナー材料に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to wear-resistant steel and piston ring or liner materials for internal combustion engines.
Wear-resistant steel with excellent wear resistance and scuff resistance,
High-strength and high elongation compared to cast iron, high toughness compared to super-strength steel and cemented carbide, high-performance wear-resistant steel with good workability and piston ring material or liner material for internal combustion engines .
【０００２】[0002]
【従来の技術及び先行技術】ディーゼルエンジン等の内
燃機関のピストンリングには、耐摩耗性、耐スカッフ性
等の特性が要求される。従来、このような用途に用いら
れる耐摩耗性合金としては、ユーバロイ等の鋳鉄や硬度
の高い超強力鋼、超硬合金が知られている。2. Description of the Related Art A piston ring of an internal combustion engine such as a diesel engine is required to have characteristics such as wear resistance and scuff resistance. Conventionally, as wear-resistant alloys used for such applications, cast irons such as Uvaloy, high-strength steels with high hardness, and cemented carbides are known.
【０００３】しかしながら、鋳鉄は強度が低く、伸びが
小さいという欠点を有し、また、超強力鋼、超硬合金は
靭性が低く、加工性に乏しく、更に耐スカッフ性（耐焼
付き性）にも劣るという欠点を有している。However, cast iron has drawbacks of low strength and low elongation, and super-strength steels and cemented carbides have low toughness, poor workability, and poor scuff resistance (seizure resistance). It has the disadvantage of being inferior.
【０００４】本発明は上記従来の問題点を解決し、耐摩
耗性、耐スカッフ性に優れる耐摩耗性鋼であって、鋳鉄
に比べて強度が高く、伸びが大きい上に、超強力鋼、超
硬合金に比べて靭性が高く、加工性も良好な高特性耐摩
耗性鋼及び内燃機関のピストンリング材料又はライナー
材料を提供すべく、炭素：１．２重量％以下、珪素：
０．８重量％以下、マンガン：０．２重量％以上、リ
ン：０．２重量％以下、硫黄：０．１重量％以上、クロ
ム：６．０重量％以下、その他の成分：０．５重量％以
下を含み、残部が実質的にＦｅよりなる耐摩耗性鋼、及
び、炭素：１．２重量％以下、珪素：０．８重量％以
下、マンガン：０．２重量％以上、リン：０．２重量％
以下、硫黄：０．１重量％以上、クロム：１５．０重量
％以下、その他の成分：０．５重量％以下を含み、残部
が実質的にＦｅよりなる耐摩耗性鋼、並びに、これらの
耐摩耗性鋼よりなる内燃機関のピストンリング材料又は
ライナー材料を見出し、先に特許出願した（特願平５−
１２３９００号。以下「先願」という。）。[0004] The present invention solves the above-mentioned conventional problems, and is a wear-resistant steel having excellent wear resistance and scuff resistance. In order to provide a high-performance wear-resistant steel and a piston ring material or a liner material for an internal combustion engine having higher toughness and better workability than a cemented carbide, carbon: 1.2% by weight or less, silicon:
0.8% by weight or less, manganese: 0.2% by weight or more, phosphorus: 0.2% by weight or less, sulfur: 0.1% by weight or more, chromium: 6.0% by weight or less, other components: 0.5 % Of carbon, the balance being substantially Fe, and carbon: 1.2% by weight, silicon: 0.8% by weight, manganese: 0.2% by weight, phosphorus: 0.2% by weight
Hereinafter, a wear-resistant steel containing 0.1% by weight or more of sulfur, 15.0% by weight or less of chromium, and 0.5% by weight or less of other components, and the balance substantially consisting of Fe; A piston ring material or a liner material for an internal combustion engine made of wear-resistant steel was discovered, and a patent application was filed earlier (Japanese Patent Application No. 5-105).
123900. Hereinafter, it is referred to as “first application”. ).
【０００５】[0005]
【発明が解決しようとする課題】上記先願によれば、耐
摩耗性等の良好な改善効果が得られるものの、既存のユ
ーバロイや片状黒鉛鋳鉄に比べて格段に優れた特性を有
するとは言い難い。According to the above-mentioned prior application, a good improvement effect such as abrasion resistance can be obtained, but it is said that it has much more excellent characteristics than existing euvaloy or flake graphite cast iron. Hard to say.
【０００６】本発明は上記先願の耐摩耗性鋼を更に改良
し、より一層耐摩耗性、耐スカッフ性に優れる耐摩耗性
鋼及び、この耐摩耗性鋼よりなる内燃機関のピストンリ
ング材料又はライナー材料を提供することを目的とす
る。The present invention further improves the above-mentioned wear-resistant steel by further improving the wear-resistance steel and the scuff resistance, and a piston ring material or a piston ring material for an internal combustion engine comprising the wear-resistant steel. It is intended to provide a liner material.
【０００７】[0007]
【課題を解決するための手段】請求項１の耐摩耗性鋼
は、 炭素：０．２〜１．２重量％ 珪素：０．２〜０．８重量％ マンガン：０．２〜２．０重量％ リン：０．００５〜０．２０重量％ 硫黄：０．１〜１．０重量％ クロム：０．２重量％以上６．０重量％未満 モリブデン：２．０〜５．０重量％ニオブ：０．２重量％以下 テルル：０．１重量％以下 バナジウム：０．２重量％以下 を含み、残部が実質的にＦｅよりなることを特徴とす
る。According to the first aspect of the present invention, there is provided a wear-resistant steel comprising: carbon: 0.2 to 1.2 % by weight silicon: 0.2 to 0.8 % by weight manganese: 0.2 to 2.0 % wt% of phosphorus: from 0.005 to 0.2 0 wt% sulfur: 0.1-1.0 wt% chromium: less than 0.2 wt% to 6.0 wt% molybdenum: 2.0 to 5.0 wt% Niobium: 0.2% by weight or less Tellurium: 0.1% by weight or less Vanadium: 0.2% by weight or less, with the balance substantially consisting of Fe.
【０００８】請求項２の耐摩耗性鋼は、 炭素：０．０５重量％以上０．８重量％未満 珪素：０．２〜０．８重量％ マンガン：０．２〜２．０重量％ リン：０．００５〜０．２０重量％ 硫黄：０．１〜１．０重量％ クロム：６．０〜１５．０重量％ ホウ素：０．０１〜０．１重量％ニオブ：０．２重量％以下 テルル：０．１重量％以下 バナジウム：０．２重量％以下 を含み、残部が実質的にＦｅよりなることを特徴とす
る。[0008] Claim 2 of the wear-resistant steel, carbon: 0.05% by weight or more and 0.8 wt% less silicon: 0.2 to 0.8 weight percent manganese: 0.2 to 2.0 wt% phosphorus : from 0.005 to 0.2 0 wt% sulfur: 0.1-1.0 wt% chromium: 6.0 to 15.0 wt% boron: 0.01 to 0.1 wt% niobium: 0.2 % Or less tellurium: 0.1% by weight or less Vanadium: 0.2% by weight or less, with the balance substantially consisting of Fe.
【０００９】請求項３の内燃機関のピストンリング材料
又はライナー材料は、請求項１の耐摩耗性鋼よりなるこ
とを特徴とする。According to a third aspect of the present invention, a piston ring material or a liner material of the internal combustion engine is made of the wear-resistant steel of the first aspect.
【００１０】請求項４の内燃機関のピストンリング材料
又はライナー材料歯、請求項２の耐摩耗性鋼よりなるこ
とを特徴とする。According to a fourth aspect of the present invention, the piston ring material or the liner material teeth of the internal combustion engine are made of the wear-resistant steel of the second aspect.
【００１１】即ち、本発明においては、先願の耐摩耗性
鋼の耐摩耗性をより一層向上させるために、特定の硬化
元素を微量添加したことに特徴を有する。That is, the present invention is characterized in that a small amount of a specific hardening element is added in order to further improve the wear resistance of the wear-resistant steel of the prior application.
【００１２】以下に本発明を詳細に説明する。Hereinafter, the present invention will be described in detail.
【００１３】本発明の耐摩耗性鋼及び内燃機関のピスト
ンリング材料又はライナー材料は、下記表１、好ましく
は表２に示す組成を有するものである。The wear-resistant steel and the piston ring material or liner material of the internal combustion engine of the present invention have the composition shown in Table 1 below, preferably Table 2.
【００１４】[0014]
【表１】 [Table 1]
【００１５】[0015]
【表２】 [Table 2]
【００１６】このような本発明の耐摩耗性鋼及び内燃機
関のピストンリング材料又はライナー材料は、一般に下
記のような通常の熱処理を施して使用に供される。ま
た、このような熱処理の他、レーザ熱処理或いはサブゼ
ロ処理を施しても良い。The wear-resistant steel and the piston ring material or liner material for an internal combustion engine of the present invention are generally used after being subjected to the following ordinary heat treatment. In addition to such heat treatment, laser heat treatment or sub-zero treatment may be performed.
【００１７】熱処理方法及び条件 請求項１の耐摩耗性鋼：焼入（温度：７８０〜８４０
℃）→油中急冷→焼戻（温度：１００〜６００℃）→放
冷 請求項２の耐摩耗性鋼：焼入（温度：１０００〜１１０
０℃）→油中急冷→焼戻（温度：２００〜６００℃）→
放冷 Heat treatment method and conditions Abrasion resistant steel according to claim 1, quenched (temperature: 780-840)
° C) → Rapid cooling in oil → Tempering (Temperature: 100 to 600 ° C) → Cooling Abrasion resistant steel of claim 2: Quenching (Temperature: 1000 to 110)
0 ° C) → Quench cooling in oil → Tempering (Temperature: 200-600 ° C) →
Cooling
【００１８】[0018]
【作用】本発明の特定組成の耐摩耗性鋼は、耐摩耗性、
耐スカッフ性に優れる上に、鋳鉄に比べて強度が高く、
伸びが大きい。また、超強力鋼、超硬合金に比べては靭
性が高く、加工性も良好である。The wear resistant steel of the specific composition of the present invention has a high wear resistance,
In addition to excellent scuff resistance, the strength is higher than cast iron,
Large growth. Further, it has higher toughness and better workability than super-strong steel and cemented carbide.
【００１９】特に、請求項１の耐摩耗性鋼にあっては、
固溶硬化元素であるＭｏの添加により、硬度向上効果が
得られ、耐摩耗性のより一層の向上が図れる。In particular, in the wear-resistant steel of claim 1,
By the addition of Mo, which is a solid solution hardening element, an effect of improving hardness can be obtained, and the wear resistance can be further improved.
【００２０】また、請求項２の耐摩耗性鋼にあっては、
析出硬化元素であるＢの添加により硬度向上効果が得ら
れ、耐摩耗性のより一層の向上が図れる。Further, in the wear-resistant steel of claim 2,
By adding B, which is a precipitation hardening element, an effect of improving the hardness can be obtained, and the wear resistance can be further improved.
【００２１】なお、請求項１の耐摩耗性鋼において、Ｍ
ｏが２．０重量％未満であると、Ｍｏを添加したことに
よる十分な耐摩耗性の向上効果が得られず、２．０重量
％から５．０重量％であると、耐摩耗性は比較的向上す
る。In the wear-resistant steel according to claim 1, M
If o is less than 2.0% by weight, a sufficient effect of improving the wear resistance due to the addition of Mo cannot be obtained, and if it is from 2.0% by weight to 5.0% by weight, the wear resistance will not be sufficient. Relatively improved.
【００２２】また、請求項２の耐摩耗性鋼において、Ｂ
が０．０１重量％未満であると、Ｂを添加したことによ
る十分な耐摩耗性の向上効果が得られず、０．０１重量
％から０．１重量％であると、耐摩耗性は比較的向上す
る。Further, in the wear-resistant steel of claim 2, B
Is less than 0.01% by weight, a sufficient effect of improving the wear resistance due to the addition of B cannot be obtained, and when the content is 0.01% by weight to 0.1% by weight, the wear resistance is compared. Improve.
【００２３】このような本発明の耐摩耗性鋼は、内燃機
関のピストンリング材料、ライナー材料等として工業的
に極めて有用である。Such a wear-resistant steel of the present invention is industrially extremely useful as a piston ring material, a liner material and the like for an internal combustion engine.
【００２４】[0024]
【実施例】以下に実施例を挙げて本発明をより具体的に
説明する。なお、以下の実施例において用いた材料は下
記のとおりである。The present invention will be described more specifically with reference to the following examples. The materials used in the following examples are as follows.
【００２５】[0025]
【表３】 [Table 3]
【００２６】なお、Ｎｏ．１〜４の耐摩耗性鋼は、下記
の熱処理を施したものである。No. The wear resistant steels Nos. 1 to 4 were subjected to the following heat treatment.
【００２７】熱処理方法及び条件 組成Ｉ：焼入（８１０℃）→油中急冷→焼戻（４００
℃）→空冷 組成II：焼入（１０５０℃）→油中急冷→焼戻（４００
℃）→空冷 実施例１ ターカロイ製ディスクと、上記Ｎｏ．１〜５の材料でそ
れぞれ構成されたピンとを用い、下記条件で摺動摩擦す
ることにより摩耗試験を行ない、結果（摩耗試験１００
時間あたりの摩耗量）を図１に示した。 Heat treatment method and conditions Composition I: quenching (810 ° C.) → quenching in oil → tempering (400
° C) → air cooling Composition II: quenching (1050 ° C) → rapid cooling in oil → tempering (400
° C) → air cooling. Example 1 A wear test was performed by using the pins made of the materials Nos. 1 to 5 and sliding friction under the following conditions.
The amount of wear per time) is shown in FIG.
【００２８】摩耗試験条件 摩擦速度 ：１．６５ｍ／ｓｅｃ 接触荷重 ：４５００Ｎ 潤滑油 ：ＳＡＥ＃２０エンジンオイル 潤滑油速度：１６０℃ 図１より本発明の耐摩耗性鋼は、先願の耐摩耗性鋼より
も更に耐摩耗性に優れることが明らかである。 Wear test conditions Friction speed: 1.65 m / sec Contact load: 4500 N Lubricating oil: SAE # 20 engine oil Lubricating oil speed: 160 ° C. From FIG. 1, the wear-resistant steel of the present invention shows the wear resistance of the earlier application. It is clear that the steel has even better wear resistance than steel.
【００２９】なお、Ｎｏ．１，２の耐摩耗性鋼につい
て、各種特性の測定結果は表４に示す通りであり、鋳鉄
に比べて強度が高く、伸びが大きく、また、超強力鋼、
超硬合金に比べて靭性が高く加工性に優れることが確認
された。特に加工性については、所定量のＰ．Ｓの含有
により切削性に優れる。No. The measurement results of various properties of the wear resistant steels 1 and 2 are as shown in Table 4 and are higher in strength and elongation than cast iron.
It was confirmed that the toughness was high and the workability was excellent as compared with the cemented carbide. In particular, regarding workability, a predetermined amount of P.I. Excellent in machinability due to S content.
【００３０】[0030]
【表４】 [Table 4]
【００３１】[0031]
【発明の効果】以上詳述した通り、本発明の耐摩耗性鋼
によれば、耐摩耗性、耐スカッフ性に特に優れる耐摩耗
性鋼であって、鋳鉄に比べて強度が高く、伸びが大きい
上に、超強力鋼、超硬合金に比べて靭性が高く、加工性
も良好な高特性耐摩耗性鋼が提供される。このような本
発明の耐摩耗性鋼は、内燃機関のピストンリング材料又
はライナー材料として極めて有用である。As described in detail above, according to the wear-resistant steel of the present invention, it is a wear-resistant steel having particularly excellent wear resistance and scuff resistance, and has higher strength and elongation than cast iron. In addition, a high-performance wear-resistant steel having high toughness and good workability as compared with super-strong steel and cemented carbide is provided. Such a wear-resistant steel of the present invention is extremely useful as a piston ring material or a liner material for an internal combustion engine.
【図１】実施例１の結果を示すグラフである。FIG. 1 is a graph showing the results of Example 1.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ Ｆ０２Ｆ 5/00 Ｆ０２Ｆ 5/00 Ｅ Ｆ１６Ｊ 1/01 Ｆ１６Ｊ 1/01 (72)発明者 田中 孝雄 岡山県玉野市玉３丁目１番１号 三井造 船株式会社玉野事業所内 (56)参考文献 特開 平２−204604（ＪＰ，Ａ) 特開 昭63−140067（ＪＰ，Ａ) 特開 昭61−60861（ＪＰ，Ａ) 特開 昭60−128247（ＪＰ，Ａ) 特開 昭51−43311（ＪＰ，Ａ) 特公 昭47−51685（ＪＰ，Ｂ１) (58)調査した分野(Int.Cl.6，ＤＢ名) C22C 38/00 301 C22C 38/00 302 C22C 38/22 C22C 38/32 F02F 1/00 F02F 5/00 F16J 1/01 ──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. 6 Identification code FI F02F 5/00 F02F 5/00 E F16J 1/01 F16J 1/01 (72) Inventor Takao Tanaka 3-chome, Tamano-shi, Okayama Prefecture No. 1 Inside the Tamano Works of Mitsui Engineering & Shipbuilding Co., Ltd. (56) References JP-A-2-204604 (JP, A) JP-A-63-140067 (JP, A) JP-A-61-60861 (JP, A) JP-A-60-128247 (JP, A) JP-A-51-43311 (JP, A) JP-B-47-51685 (JP, B1) (58) Fields investigated (Int. Cl. 6 , DB name) C22C 38 / 00 301 C22C 38/00 302 C22C 38/22 C22C 38/32 F02F 1/00 F02F 5/00 F16J 1/01
Claims (4)
摩耗性鋼。1. A carbon: 0.2 to 1.2 wt% silicon: 0.2 to 0.8 weight percent manganese: 0.2 to 2.0% by weight of phosphorus: 0.005 to 0.2 0% Sulfur: 0.1 to 1.0 % by weight Chromium: 0.2 % to less than 6.0% by weight Molybdenum: 2.0 to 5.0% by weight Niobium: 0.2% by weight or less Tellurium: 0.1 % by weight % Or less vanadium: A wear-resistant steel containing 0.2% by weight or less, with the balance substantially consisting of iron.
未満 珪素：０．２〜０．８重量％ マンガン：０．２〜２．０重量％ リン：０．００５〜０．２０重量％ 硫黄：０．１〜１．０重量％ クロム：６．０〜１５．０重量％ ホウ素：０．０１〜０．１重量％ニオブ：０．２重量％以下 テルル：０．１重量％以下 バナジウム：０．２重量％以下 を含み、残部が実質的に鉄よりなることを特徴とする耐
摩耗性鋼。2. Carbon: 0.05% by weight to 0.8 % by weight
Less Silicon: 0.2 to 0.8 weight percent manganese: 0.2 to 2.0% by weight of phosphorus: 0.005 to 0.2 0 wt% Sulfur: 0.1-1.0 wt% chromium: 6. 0-15.0 % by weight Boron: 0.01-0.1% by weight Niobium: 0.2% by weight or less Tellurium: 0.1% by weight or less Vanadium: 0.2% by weight or less, with the balance substantially A wear-resistant steel characterized by being made of iron.
のピストンリング材料又はライナー材料。3. A piston ring material or liner material for an internal combustion engine comprising the wear-resistant steel according to claim 1.
のピストンリング材料又はライナー材料。4. A piston ring material or liner material for an internal combustion engine comprising the wear-resistant steel according to claim 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6050367A JP2970387B2 (en) | 1994-03-22 | 1994-03-22 | Wear-resistant steel and piston ring or liner materials for internal combustion engines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6050367A JP2970387B2 (en) | 1994-03-22 | 1994-03-22 | Wear-resistant steel and piston ring or liner materials for internal combustion engines |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07258792A JPH07258792A (en) | 1995-10-09 |
| JP2970387B2 true JP2970387B2 (en) | 1999-11-02 |
Family
ID=12856927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6050367A Expired - Fee Related JP2970387B2 (en) | 1994-03-22 | 1994-03-22 | Wear-resistant steel and piston ring or liner materials for internal combustion engines |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2970387B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE60027355T2 (en) | 1999-06-25 | 2007-01-04 | Hitachi Metals, Ltd. | Self-lubricating piston ring material for internal combustion engines and piston ring |
| US6527879B2 (en) | 1999-06-25 | 2003-03-04 | Hitachi Metals Ltd. | Self-lubricating piston ring material for internal combustion engine and piston ring |
| JP2007046687A (en) * | 2005-08-09 | 2007-02-22 | Ntn Corp | Internal member of one-way clutch, its manufacturing method, and clutch-incorporating pulley comprising internal member |
-
1994
- 1994-03-22 JP JP6050367A patent/JP2970387B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07258792A (en) | 1995-10-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1384794B1 (en) | Spheroidal cast iron particulary for piston rings and method for its production | |
| KR100260348B1 (en) | Cast iron and piston ring | |
| JP3297150B2 (en) | Cast iron having excellent corrosion resistance and wear resistance, and a cylinder liner formed from the cast iron | |
| JP2970387B2 (en) | Wear-resistant steel and piston ring or liner materials for internal combustion engines | |
| JP2000328193A (en) | Non-refining steel for hot forging excellent in wear resistance | |
| JP2970310B2 (en) | Wear-resistant steel and piston ring or liner materials for internal combustion engines | |
| JP3218625B2 (en) | Scuff and wear-resistant sliding parts | |
| JP3866841B2 (en) | Wear-resistant steel | |
| CN109825757B (en) | Cast iron material | |
| JP2001294989A (en) | Wear resistant steel and piston ping or liner material of internal combustion engine | |
| US3042512A (en) | Wear resistant cast iron | |
| JPS5911656B2 (en) | High hardness wear-resistant cast iron | |
| JPS6156293B2 (en) | ||
| JPH11131180A (en) | Wear resistant steel | |
| JP3450727B2 (en) | Piston ring for internal combustion engine | |
| JP2594505B2 (en) | Rocker arm | |
| JP2733773B2 (en) | Rocker arm | |
| JPH0468373B2 (en) | ||
| JPH11141656A (en) | Gear | |
| JP2000265242A (en) | Non-heattreated steel for hot forging, excellent in wear resistance | |
| JPH0127145B2 (en) | ||
| JP2866868B2 (en) | Piston ring material | |
| KR930006291B1 (en) | Manufacture of sliding member made or cast iron | |
| RU2082815C1 (en) | Wear-resistant steel for the shaped ingots | |
| JP2637500B2 (en) | Sliding member |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19990727 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080827 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090827 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090827 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100827 Year of fee payment: 11 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100827 Year of fee payment: 11 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110827 Year of fee payment: 12 |
|
| LAPS | Cancellation because of no payment of annual fees |