WO2024048601A1 - 転がり軸受及び転動体の製造方法 - Google Patents

転がり軸受及び転動体の製造方法 Download PDF

Info

Publication number
WO2024048601A1
WO2024048601A1 PCT/JP2023/031296 JP2023031296W WO2024048601A1 WO 2024048601 A1 WO2024048601 A1 WO 2024048601A1 JP 2023031296 W JP2023031296 W JP 2023031296W WO 2024048601 A1 WO2024048601 A1 WO 2024048601A1
Authority
WO
WIPO (PCT)
Prior art keywords
rolling
temperature
less
minutes
hardness
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.)
Ceased
Application number
PCT/JP2023/031296
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
杏佳 津組
啓之 内田
冕 張
弘樹 小俣
祐司 宮本
浜崎　純一
翔 橋本
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NSK Ltd
Original Assignee
NSK Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NSK Ltd filed Critical NSK Ltd
Priority to JP2024544297A priority Critical patent/JPWO2024048601A1/ja
Priority to CN202380060015.4A priority patent/CN119731444A/zh
Priority to EP23860363.3A priority patent/EP4582713A1/en
Priority to US19/105,863 priority patent/US20260063171A1/en
Priority to KR1020257004649A priority patent/KR20250037522A/ko
Publication of WO2024048601A1 publication Critical patent/WO2024048601A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/36—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for balls; for rollers
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/26—Methods of annealing
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
    • C21D1/58—Oils
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
    • C21D1/60—Aqueous agents
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D6/00—Heat treatment of ferrous alloys
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
    • F16C19/24—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for radial load mainly
    • F16C19/26—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for radial load mainly with a single row of rollers
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/32—Balls
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/34—Rollers; Needles
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/001—Austenite
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2202/00—Solid materials defined by their properties
    • F16C2202/02—Mechanical properties
    • F16C2202/04—Hardness
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2204/00—Metallic materials; Alloys
    • F16C2204/60—Ferrous alloys, e.g. steel alloys
    • F16C2204/66—High carbon steel, i.e. carbon content above 0.8 wt%, e.g. through-hardenable steel
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2204/00—Metallic materials; Alloys
    • F16C2204/60—Ferrous alloys, e.g. steel alloys
    • F16C2204/70—Ferrous alloys, e.g. steel alloys with chromium as the next major constituent
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2223/00—Surface treatments; Hardening; Coating
    • F16C2223/10—Hardening, e.g. carburizing, carbo-nitriding

Definitions

  • the present invention relates to a method for manufacturing a rolling bearing and a rolling element.
  • Patent Document 1 discloses that at least one of the outer ring, inner ring, and rolling elements is subjected to quenching and tempering treatment, and the hardness of the surface layer is reduced.
  • a rolling bearing is disclosed that has an HRC of 60 or more and an HRC of 65 or less, and further has retained austenite on the raceway surface of 15% by volume or more and 24% by volume or less.
  • the amount of retained austenite can be increased by quenching and tempering treatment without performing special heat treatment such as carbonitriding treatment, and the peeling life can be improved.
  • further improvement in peel life is required. Therefore, the present invention has been made with attention to the above-mentioned problems, and an object of the present invention is to provide a rolling bearing and a method for manufacturing a rolling element that can improve the peeling life.
  • a rolling bearing including an inner ring, an outer ring, and a rolling element, wherein the rolling element has a hardness of HRC61.1 or more, a retained austenite amount of 31 vol% or less, and the inner ring And a rolling bearing is provided, wherein the ratio of the hardness of the rolling elements to the hardness of the outer ring is 1 or more.
  • a method for manufacturing a rolling element used in a rolling bearing in which the heated material is heated at a temperature of 60°C or more and 120°C or less after being processed into a predetermined shape to become the rolling element.
  • a method is provided.
  • a method for manufacturing a rolling bearing and a rolling element that can improve the peeling life is provided.
  • FIG. 1 is a sectional view showing a rolling bearing according to an embodiment of the present invention. It is a graph showing the relationship between the amount of retained austenite and the dimensional change rate.
  • FIG. 3 is an explanatory diagram showing a method of heat treatment of rolling elements.
  • the rolling bearing 1 includes an inner ring 2, an outer ring 3, a plurality of rolling elements 4, and a cage 5.
  • the inner ring 2 and the outer ring 3 are also collectively referred to as a bearing ring.
  • the ratio of the hardness of the rolling elements 4 to the hardness of the inner ring 2 and outer ring 3 is 1 or more. In other words, the hardness of the rolling elements 4 is greater than or equal to the hardness of the inner ring 2 and outer ring 3.
  • the rolling elements 4 are rollers. Further, the rolling elements 4 have a hardness of HRC 61.1 or more and a retained austenite amount of 31 vol% or less. Furthermore, it is preferable that the residual compressive stress on the surface of the rolling element 4 is 100 MPa or less. Since the amount of retained austenite and the rate of dimensional change have the relationship shown in FIG. 2, the larger the amount of initial retained austenite, the larger the dimensional change tends to be. When the amount of retained austenite increases, the gap between the rolling elements 4 and the raceway becomes narrower, which tends to cause seizure and shorten the lifespan.
  • the rolling elements 4 can be made harder than the inner ring 2 and the outer ring 3.
  • the inner ring 2 and outer ring 3 are not particularly limited as long as they satisfy the hardness ratio with the rolling elements 4, and the manufacturing method, material, etc. are not particularly limited.
  • the inner ring 2, outer ring 3, and rolling elements 4 are preferably made of the same material, SUJ2 or SUJ3, which is a high carbon chromium bearing steel specified in JIS G4805.
  • the rolling elements 4 are manufactured using the heat treatment pattern shown in FIG. As shown in FIG. 3, first, a material processed into a predetermined shape to form the rolling elements 4 (also referred to as a processed material or workpiece) is heated and held at a temperature of 800°C or higher and 900°C or lower for a certain period of time. Perform a high temperature holding process. In the high temperature holding step, it is preferable that the time for holding at a temperature of 800° C. or more and 900° C. or less is 30 minutes or more and 90 minutes or less.
  • a quenching step is performed in which the heated material is hardened.
  • the material is immersed in oil or water at a temperature of 60°C or higher and 120°C or lower (quenching treatment). Then, while the material is immersed in oil or water, the temperature of the material is maintained at 60°C or more and 120°C or less, preferably 90°C. Further, the time for maintaining the temperature of the material at 60° C. or higher and 120° C. or lower while immersing the material in oil or water is 20 minutes or more, preferably 24 minutes or more. In addition, when the temperature of the material is less than 60° C., retained austenite is not stabilized. Furthermore, if the temperature of the material exceeds 120° C., energy is wasted and manufacturing costs increase.
  • a first low-temperature holding step is performed in which the material is cooled and held at a temperature of 5° C. or higher and 35° C. or lower for 30 minutes or more.
  • the hardened material is cooled by leaving it at room temperature and allowing it to stand still. At this time, air cooling may be performed using a fan or the like.
  • retained austenite can be further stabilized by holding the material at a temperature of 5° C. or higher and 35° C. or lower.
  • a vacuum cleaning step is performed in which the material is vacuum cleaned at a temperature of 100° C. or more and 140° C. or less, preferably 120° C., for 40 minutes or more.
  • a vacuum cleaning machine that can be heated and whose temperature can be set.
  • the time for performing vacuum cleaning is 40 minutes or more.
  • Vacuum cleaning not only has excellent cleaning power, but also removes air bubbles and allows the cleaning solution to come into contact with every corner of the material, allowing it to be heated evenly and quickly. Furthermore, vacuum cleaning causes less solvent loss and reduces environmental impact.
  • a second low temperature holding step is performed in which the material is cooled and the temperature of the material is maintained at 35° C. or lower.
  • the material may be cooled in the same manner as the first low temperature holding step, and when cooling to a low temperature of about 0° C. to 10° C., oil cooling or water cooling may be used. Note that although the temperature of the material may be lower than 0° C., this is not preferable because energy is wasted.
  • retained austenite can be further stabilized. Note that in the second low temperature holding step, if the temperature of the material exceeds 35° C., the stabilizing effect of retained austenite will be reduced.
  • the second low temperature holding step it is preferable to hold the temperature of the material at 35° C. or lower for 15 minutes or more.
  • a tempering step is performed in which the material is held at a temperature of 160° C. or more and 180° C. or less for 90 minutes or more and 150 minutes or less.
  • the tempering process is not essential, by performing the tempering process, it is possible to improve the toughness and dimensional stability.
  • the method for manufacturing the rolling element 4 at least a quenching process, a first low temperature holding process, a vacuum cleaning process, and a second low temperature holding process are performed.
  • rolling elements 4 having a retained austenite content of 31 vol % or less, a hardness of HRC 61.1 or more, and a surface residual compressive stress of 100 MPa or less can be manufactured smoothly and while reducing energy.
  • the residual compressive stress is an average value in the circumferential direction at a depth of 100 ⁇ m.
  • the method for manufacturing the rolling element 4 according to this embodiment does not require any special equipment, and it is possible to optimize the heat treatment conditions using general equipment. Therefore, there is no need to provide new equipment, and the life of the rolling bearing can be extended at low cost. Furthermore, since there is no need for nitriding treatment, etc. used for surface treatment of bearings, it also leads to a reduction in CO 2 emissions. Furthermore, in the rolling bearing of this embodiment, since there are no restrictions on the hardness of the inner ring 2 and the outer ring 3, there are fewer restrictions on the materials to be used, and manufacturing can be performed easily.
  • the inner ring 2, outer ring 3, and rolling elements 4 are made of the same material SUJ2 or SUJ3, which is a high carbon chromium bearing steel specified in JIS G4805, but the present invention is not limited to such an example.
  • the inner ring 2, outer ring 3, and rolling elements 4 may be made of materials other than SUJ2 and SUJ3, or may be made of different materials.
  • a rolling bearing 1 according to one aspect of the present invention is a rolling bearing 1 including an inner ring 2, an outer ring 3, and a rolling element 4, in which the rolling element 4 has a hardness of HRC61.1 or higher and has retained austenite.
  • the amount is 31 vol% or less, and the ratio of the hardness of the rolling elements 4 to the hardness of the inner ring 2 and outer ring 3 is 1 or more.
  • the surface hardness of the rolling elements 4 is made harder than the raceway surfaces of the inner ring 2 and outer ring 3, and the surface roughness is improved by an appropriate hardness difference between the contacting members. Damage to the rolling elements 4 can be suppressed.
  • the rolling elements 4 are rollers.
  • the rolling elements 4 are made of SUJ2 or SUJ3 material, which is a high carbon chromium bearing steel specified in JIS G4805.
  • a method for manufacturing rolling elements 4 is a method for manufacturing rolling elements 4 used in rolling bearings, in which rolling elements 4 are processed into a predetermined shape and then heated.
  • a quenching step in which the material is immersed in oil or water at a temperature of 60°C or higher and 120°C or lower, the material is kept immersed in oil or water, and the temperature of the material is maintained at 60°C or higher and 120°C or lower for 20 minutes or more;
  • there is a first low-temperature holding step in which the material is cooled and held at a temperature of 5°C or more and 35°C or less for 30 minutes or more, and after the first low-temperature holding step, the material is kept at a temperature of 100°C or more and 140°C or less
  • the method includes a vacuum cleaning step in which vacuum cleaning is performed for 40 minutes or more, and a second low temperature holding step in which the material is cooled and the temperature of the material is maintained at 35° C. or lower after the vacuum cleaning step.
  • the configuration of (4) above further includes a tempering step of holding the material at a temperature of 160° C. or more and 180° C. or less for 90 minutes or more and 150 minutes or less after the second low temperature holding step.
  • the rolling elements 4 are rollers.
  • the rolling elements 4 are made of SUJ2 or SUJ3 material, which is a high carbon chromium bearing steel specified in JIS G4805.
  • a rolling bearing according to one aspect of the present invention is a rolling bearing comprising an inner ring, an outer ring, and a rolling element, and is manufactured by the method for manufacturing a rolling bearing having the configuration of any one of (4) to (7) above. be done.
  • a rolling element 4 was manufactured using the method for manufacturing a rolling element according to the above embodiment, and the residual stress, amount of retained austenite, and hardness were investigated.
  • Table 1 shows the heat treatment conditions, residual stress, amount of retained austenite, and hardness in Examples 1 to 6 using the heat treatment conditions of the above embodiment and Comparative Examples 1 and 2 where the heat treatment conditions were different from the above embodiment. The results are shown below.
  • a material made of SUJ2 and processed into the shape of the rolling element 4 was heated to 845°C.
  • the heated material was immersed in oil at 60°C or 90°C. The time to soak the material in oil was 24 minutes. Furthermore, oil was drained for 40 minutes, and then a first low temperature holding step was performed.
  • the material was held at a temperature of 5° C. or more and 35° C. or less for 30 minutes by an air cooling method in which the material was left at room temperature and cooled, or by a fan cooling method in which the material was air-cooled using a fan.
  • a vacuum cleaning step vacuum cleaning was performed at a temperature of 120° C. for 40 minutes.
  • Comparative Example 1 instead of vacuum cleaning, cleaning was performed with warm water at 80° C. for 30 minutes.
  • second low temperature holding step the material was cooled and the temperature was maintained at 0° C. or higher and 10° C. or lower.
  • cooling was performed for 15 minutes or 30 minutes.
  • tempering step the material was heated and maintained at a temperature of 160°C, 180°C, or 200°C.
  • a rolling element 4 having a retained austenite amount of 31 vol % or less, a hardness of HRC 61.1 or more, and a surface residual compressive stress of 100 MPa or less could be manufactured.
  • HRC 61.1 or higher corresponds to HMV 740 or higher (SAE J417).

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Rolling Contact Bearings (AREA)
  • Heat Treatment Of Articles (AREA)
PCT/JP2023/031296 2022-08-31 2023-08-29 転がり軸受及び転動体の製造方法 Ceased WO2024048601A1 (ja)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP2024544297A JPWO2024048601A1 (cg-RX-API-DMAC7.html) 2022-08-31 2023-08-29
CN202380060015.4A CN119731444A (zh) 2022-08-31 2023-08-29 滚动轴承以及滚动体的制造方法
EP23860363.3A EP4582713A1 (en) 2022-08-31 2023-08-29 Rolling bearing and rolling body production method
US19/105,863 US20260063171A1 (en) 2022-08-31 2023-08-29 Rolling Bearing and Rolling Element Production Method
KR1020257004649A KR20250037522A (ko) 2022-08-31 2023-08-29 구름 베어링 및 전동체의 제조 방법

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2022138275 2022-08-31
JP2022-138275 2022-08-31

Publications (1)

Publication Number Publication Date
WO2024048601A1 true WO2024048601A1 (ja) 2024-03-07

Family

ID=90099612

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2023/031296 Ceased WO2024048601A1 (ja) 2022-08-31 2023-08-29 転がり軸受及び転動体の製造方法

Country Status (6)

Country Link
US (1) US20260063171A1 (cg-RX-API-DMAC7.html)
EP (1) EP4582713A1 (cg-RX-API-DMAC7.html)
JP (1) JPWO2024048601A1 (cg-RX-API-DMAC7.html)
KR (1) KR20250037522A (cg-RX-API-DMAC7.html)
CN (1) CN119731444A (cg-RX-API-DMAC7.html)
WO (1) WO2024048601A1 (cg-RX-API-DMAC7.html)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH049449A (ja) * 1990-04-27 1992-01-14 Nippon Seiko Kk 転がり軸受
JPH1161337A (ja) * 1996-09-19 1999-03-05 Nippon Seiko Kk 転動部材及びこれを備えた転動装置
JP2002155314A (ja) * 2000-11-15 2002-05-31 Nsk Ltd 転動部品の焼入れ方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3845843B2 (ja) * 2001-11-14 2006-11-15 株式会社ジェイテクト 転がり、摺動部品およびその製造方法
JP2009041652A (ja) 2007-08-08 2009-02-26 Nsk Ltd 転がり軸受およびその製造方法
JP2015203153A (ja) * 2014-04-16 2015-11-16 日本精工株式会社 転がり軸受

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH049449A (ja) * 1990-04-27 1992-01-14 Nippon Seiko Kk 転がり軸受
JPH1161337A (ja) * 1996-09-19 1999-03-05 Nippon Seiko Kk 転動部材及びこれを備えた転動装置
JP2002155314A (ja) * 2000-11-15 2002-05-31 Nsk Ltd 転動部品の焼入れ方法

Also Published As

Publication number Publication date
JPWO2024048601A1 (cg-RX-API-DMAC7.html) 2024-03-07
EP4582713A1 (en) 2025-07-09
KR20250037522A (ko) 2025-03-17
US20260063171A1 (en) 2026-03-05
CN119731444A (zh) 2025-03-28

Similar Documents

Publication Publication Date Title
KR20050004843A (ko) 베어링 궤도 부재의 제조 방법
JP5045491B2 (ja) 大型転がり軸受
JP2013160314A (ja) 転がり軸受
JP2010510455A (ja) 特に風力用動伝軸のためのラジアルローラー軸受
JP2010025311A (ja) 転がり軸受及びその製造方法
JP2008297620A (ja) 高炭素クロム軸受鋼の焼入方法および高炭素クロム軸受鋼ならびに軸受部品および転がり軸受
JP2008174822A (ja) スラスト軸受
JP2008174821A (ja) スラスト軸受
JP4375038B2 (ja) スラスト針状ころ軸受
KR20250037522A (ko) 구름 베어링 및 전동체의 제조 방법
CN109072978B (zh) 滚动轴承和轴承轨道面的耐磨损处理方法
JP2000230544A (ja) ころ軸受およびその製造方法
JP2010209965A (ja) 転がり軸受用保持器
CN115433944A (zh) 钢构件的热处理方法
JP2009041652A (ja) 転がり軸受およびその製造方法
JP2001288535A (ja) 転がり軸受
JP2005299702A (ja) 自動調心ころ軸受
JPH06109021A (ja) 転がり軸受
JP2007186760A (ja) 転がり軸受用軌道輪の製造方法及び転がり軸受
JPS6212305B2 (cg-RX-API-DMAC7.html)
JP2009115318A (ja) 転がり軸受
JP2008082379A (ja) スラスト軸受構成部品の製造方法
JP2006200724A (ja) オートマチック・トランスミッション用スラスト軸受
JP2004116721A (ja) 転がり摺動部材、その製造方法、並びに転がり軸受
JP2009019234A (ja) 転がり軸受

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 23860363

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 20257004649

Country of ref document: KR

Kind code of ref document: A

WWE Wipo information: entry into national phase

Ref document number: 1020257004649

Country of ref document: KR

WWE Wipo information: entry into national phase

Ref document number: 202380060015.4

Country of ref document: CN

WWE Wipo information: entry into national phase

Ref document number: 2024544297

Country of ref document: JP

WWP Wipo information: published in national office

Ref document number: 1020257004649

Country of ref document: KR

WWP Wipo information: published in national office

Ref document number: 202380060015.4

Country of ref document: CN

WWE Wipo information: entry into national phase

Ref document number: 2023860363

Country of ref document: EP

NENP Non-entry into the national phase

Ref country code: DE

ENP Entry into the national phase

Ref document number: 2023860363

Country of ref document: EP

Effective date: 20250331

WWP Wipo information: published in national office

Ref document number: 2023860363

Country of ref document: EP