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1. 发明专利

JPH0247537B2 失效
公开(公告)号：JPH0247537B2
公开(公告)日：1990-10-22
申请号：JP4088885
申请日：1985-02-28
申请人： RIKEN KK
发明人： ITABASHI FUJIO , HOSOO HIROSHI , MINAGAWA SAKAE
IPC分类号： C22C38/00 , C22C38/24 , C23C8/26 , F02F5/00 , F16J9/26

2. 发明专利

JPH01279733A PISTON RING MATERIAL MADE OF STEEL 失效
公开(公告)号：JPH01279733A
公开(公告)日：1989-11-10
申请号：JP10882388
申请日：1988-04-30
申请人： RIKEN KK
发明人： HOSOO HIROSHI
IPC分类号： C22C38/00 , C22C38/24
摘要： PURPOSE:To improve seizure resistance and wear resistance as a piston ring material by specifying C content in a steel and also regulating respective contents of other chemical components. CONSTITUTION:A piston ring material made of steel has a composition consisting of 0.9-1.4% C and the balance essentially Fe and the seizure resistance of this steel is regulated to a value equivalent to that of cast iron. By incorporating 0.1-10.0%, in total, of one or more elements among Cr, Mo, and V into the above steel, self-wear resistance can be improved without causing deterioration in seizure resistance. By this method, the use of this piston ring material for a piston ring for internal combustion engine is made possible while obviating the necessity of surface treatment, such as hard chrome plating.

3. 发明专利

JPS6435055A PISTON RING 失效
公开(公告)号：JPS6435055A
公开(公告)日：1989-02-06
申请号：JP19123487
申请日：1987-07-30
申请人： RIKEN KK , DAIDO STEEL CO LTD
发明人： ITABASHI FUJIO , HOSOO HIROSHI
IPC分类号： F02F5/00 , F16J9/26
摘要： PURPOSE:To achieve excellent abrasion resistance and workability by employing ferrous material containing carbon, chromium, molybdenum and banadium with specific ratio for forming a piston ring. CONSTITUTION:A piston ring in an internal combustion engine, an oil ring for example, is constructed with an oil ring body 1 and a coil spring 2. The oil ring body 1 is formed of ferrous material containing 0.4-0.6wt.% of carbon, 16-19wt.% of chromium, 0.5-2.0wt.% of molybdenum and 0.03-0.20wt.% of banadium. A hard surface treating layer is applied at least onto the face of the oil ring body 1 composed of such material sliding with the cylinder wall. Consequently, a piston ring having excellent abrasion resistance and workability can be obtained.

4. 发明专利

JPS61144470A PISTON RING 失效
公开(公告)号：JPS61144470A
公开(公告)日：1986-07-02
申请号：JP26798084
申请日：1984-12-19
申请人： RIKEN KK
发明人： ITABASHI FUJIO , HOSOO HIROSHI , MINAGAWA SAKAE
IPC分类号： C22C38/00 , C22C38/24 , C23C8/26 , F02F5/00 , F16J9/26
摘要： PURPOSE:To obtain sufficient wear-resistance without applying hard chrome plating by manufacturing a piston ring comprising silicon, chrome, molybdenum, vanadium and the residual part or iron. CONSTITUTION:A piston ring comprising 0.6-0.85wt% of carbon, 0.2-1.0wt% of silicon, 17-18wt% of chrome, 0.8-1.5wt% of molybdenum, 0.05-0.15wt% of vanadium and the residual part which is substantially composed of iron is manufactured. Carbon forms a carbide to contribute to wear-resistance, and silicon improves heat-resisting property. Chrome forms a carbide to contribute to wear-resistance and scuffing property and molybdenum also forms a carbide to contribute to wear-resistance. Vanadium forms a carbide to improve wear- resistance and further gives resistance against tempering softening.

5. 发明专利

JPH01188763A PISTON RING 失效
公开(公告)号：JPH01188763A
公开(公告)日：1989-07-28
申请号：JP801788
申请日：1988-01-18
申请人： RIKEN KK
发明人： HOSOO HIROSHI
IPC分类号： F02F5/00 , F16J9/26
摘要： PURPOSE:To improve abrasion resistance and scuffing resistance by forming a hard layer by means of nitriding on a sliding face on the outer periphery of a base material formed with each specific wt.% of carbon, chrome, molybdenum, vanadium, and tungsten and the remaining portion of iron. CONSTITUTION:After forming an approx. 100-mum nitriding layer by giving gas nitriding to the surface of a piston ring made of a base material of a chemical composition formed with a 0.70-1.10wt.% carbon, a 3.0-6.0wt.% chrome, a 4.0-6.0wt.% molybdenum, a 1.0-2.5wt.% vanadium, and a 5.0-8.0wt.% tungsten and the remaining portion substantially of iron, approx. 30-mum nitriding layer is removed by polishing to remove a compound layer on the surface. Thereby, scuffing resistance can be improved without impairing abrasion resistance, to improve durability.

6. 发明专利

JPH01182668A PISTON RING 失效
公开(公告)号：JPH01182668A
公开(公告)日：1989-07-20
申请号：JP659788
申请日：1988-01-15
申请人： RIKEN KK
发明人： HOSOO HIROSHI
IPC分类号： F02F5/00 , F16J9/26
摘要： PURPOSE:To make improvements in scuff resistance and durability without damaging abrasion resistance by using base metals of a chemical composition consisting of each specified range of wt.% in carbon, chromium and cobalt, a specified range of wt.% in either of molybdenum and vanadium or both, and substantially iron in the rest. CONSTITUTION:On the basis of steel types of a chemical composition of 0.6-1.0wt.%of carbon, 15-23wt.% of chromium, and 0.1-3.1wt.% in either of molybdenum and vanadium or both proven in abrasion resistance for a piston ring subjected to nitriding, such one that added cobalt as much as 2.0-10.0wt.% as an alloying element to improve the extent of scuff resistance. Then, a hard layer by the nitriding is installed in at least a peripheral sliding surface of this base material. With this constitution, improvements in the scuff resistance and durability are well promotable without damaging any abrasion resistance.

7. 发明专利

JPS6154865B2 失效
公开(公告)号：JPS6154865B2
公开(公告)日：1986-11-25
申请号：JP22142883
申请日：1983-11-26
申请人： RIKEN KK
发明人： ITABASHI FUJIO , HOSOO HIROSHI , IMAMURA MITSUNORI
IPC分类号： C22C38/00 , C22C38/24 , C23C8/26 , F16J9/26

8. 发明专利

JPS6411100B2 失效
公开(公告)号：JPS6411100B2
公开(公告)日：1989-02-23
申请号：JP25234584
申请日：1984-11-29
申请人： RIKEN KK
发明人： ITABASHI FUJIO , HOSOO HIROSHI
IPC分类号： C22C38/00 , C22C38/24 , F02F5/00 , F16J9/26

9. 发明专利

JPS63289374A PISTON RING 失效
公开(公告)号：JPS63289374A
公开(公告)日：1988-11-25
申请号：JP12537887
申请日：1987-05-22
申请人： RIKEN KK
发明人： SHINADA MANABU , HOSOO HIROSHI
IPC分类号： F02F5/00 , F16J9/26
摘要： PURPOSE:To prevent the occurrence of seizure which is apt to occur during running-in at the initial stage of running, by a method wherein a nitride layer is formed at least on the outer peripheral slide surface of a piston ring, and a composite dispersion plated layer is formed in a depth of 0.5-20 m on a nitride layer surface. CONSTITUTION:A piston ring 1 is formed by a chrome steel consisting of, for example, 0.16-1.3 % C, 12-19% Cr, a small amount of Mo and/or V, and e nitriding treatment layer 3 having excellent resistance to wear is formed in a depth of approximate 0.05 mm at least on an outer peripheral slide surface 2, and e very thin composite dispersion plated layer 4 with a thickness of 0.5-20 mum is formed on the surface of the nitriding treatment layer. The composite dispersion plated layer 4 is formed such that a metallic sulfide, e.g. tungsten disulfide, molybdenum disulfide, boron nitride or solid lubricating particle, e.g. carbon, are dispersed in a metal plated substrate, iron or Ni, and has excellent resistance to wear and especially excellent resistance to baking. This constitution prevents the occurrence of seizure which is apt to occur during running-in at the initial stage of running, and enables provision of an increased life.

10. 发明专利

JPS60155647A PISTON RING 失效
公开(公告)号：JPS60155647A
公开(公告)日：1985-08-15
申请号：JP1070384
申请日：1984-01-24
申请人： RIKEN KK
发明人： ITABASHI FUJIO , IMAMURA MITSUNORI , HOSOO HIROSHI
IPC分类号： F02F5/00 , C22C38/00 , C22C38/24 , F16J9/26
摘要： PURPOSE:To manufacture a piston ring having superior wear resistance, workability, heat resistance and toughness by nitriding the sliding surface of a piston ring made of a high-carbon Cr-Mo-V steel to form a hard layer. CONSTITUTION:A piston ring is made of an alloy steel contg. 0.8-1.1% C, 9- 11% Cr, 0.6-1.5% Mo and 0.1-0.5% V, and the surface of the piston ring sliding along a cylinder is nitrided by gas nitriding, gas soft-nitriding, salt bath nitriding, ion nitriding or other method to form a hard nitride layer. A piston ring showing high wear resistance owing to the hard nitride layer and having superior workability, heat resistance and toughness is obtd.

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