WO2000028102A1 - Piece de roulement a billes resistant aux hautes temperatures - Google Patents

Piece de roulement a billes resistant aux hautes temperatures Download PDF

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Publication number
WO2000028102A1
WO2000028102A1 PCT/JP1999/006253 JP9906253W WO0028102A1 WO 2000028102 A1 WO2000028102 A1 WO 2000028102A1 JP 9906253 W JP9906253 W JP 9906253W WO 0028102 A1 WO0028102 A1 WO 0028102A1
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WO
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Prior art keywords
less
temperature
rolling bearing
rolling
hardness
Prior art date
Application number
PCT/JP1999/006253
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English (en)
Japanese (ja)
Inventor
Katsunori Itou
Kikuo Maeda
Toshiya Kinami
Sadayuki Nakamura
Original Assignee
Ntn Corporation
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 Ntn Corporation filed Critical Ntn Corporation
Priority to CA002316183A priority Critical patent/CA2316183C/fr
Priority to DE19982613T priority patent/DE19982613B3/de
Priority to KR1020007007602A priority patent/KR20010034008A/ko
Publication of WO2000028102A1 publication Critical patent/WO2000028102A1/fr

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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
    • 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
    • F16C33/38—Ball cages
    • F16C33/44—Selection of substances
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • 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
    • C21D9/40—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rings; for bearing races
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/001—Ferrous alloys, e.g. steel alloys containing N
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/34—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
    • C23C8/28—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases more than one element being applied in one step
    • C23C8/30—Carbo-nitriding
    • C23C8/32—Carbo-nitriding of ferrous surfaces
    • 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
    • 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
    • F16C33/58—Raceways; Race rings
    • F16C33/62—Selection of substances
    • 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
    • F16C2204/64—Medium carbon steel, i.e. carbon content from 0.4 to 0,8 wt%
    • 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

Definitions

  • the present invention relates to a rolling bearing component used for a power transmission device such as an automobile, an aircraft, a ship, and an industrial machine, and an engine unit, and more specifically, to an environment and an atmosphere where foreign matters such as dust and dirt are mixed.
  • the present invention relates to an inexpensive high-temperature rolling bearing component having an excellent rolling fatigue life even in an environment in which the temperature is from room temperature to 300 ° C. Background art
  • Rolling bearings used in power transmission parts and engine parts of automobiles, aircraft, ships, industrial machines, etc. are used in harsh environments. Require reliability and reliability.
  • foreign matter such as dust, dirt, and iron powder may be mixed in, and in such an environment, the rolling fatigue life is significantly reduced as compared with the use in a clean environment.
  • high-carbon chromium bearing steel such as SUJ2
  • case-hardened steel such as SCM420, SNCM420, and SNCM815 have been subjected to carbonitriding so that The method of generating an appropriate amount of residual austenite is applied, and the life is improved even if foreign matter is mixed.
  • rolling bearings used in automobiles and aircraft are used in high-temperature environments, they are required to have excellent rolling fatigue life characteristics in extremely contaminated environments and high-temperature environments. ing.
  • high carbon chromium bearings such as SUJ2 are quenched, or case hardened steels such as SCM420 and SNCM815 are carburized. After obtaining dimensional stability Therefore, tempering is performed at a high temperature of 300 ° C. or more.
  • the present invention has been made in order to solve the above problems, and has excellent rolling fatigue life even in a foreign material mixed environment and a high temperature environment, and is inexpensive as compared with a conventional example.
  • An object of the present invention is to provide a high-temperature rolling bearing component. Disclosure of the invention
  • compositional elements and their respective components that can provide an inexpensive high-temperature rolling bearing part having excellent rolling fatigue life in a foreign material-contaminated environment and a high-temperature environment. The content was found.
  • the high-temperature rolling bearing component of the present invention is a component of a high-temperature rolling bearing having an inner ring, an outer ring, and a rolling element, wherein the alloy element content is mass% and c (carbon) is
  • Si 0.6% or more and 1.3% or less
  • Si 0.3% or more and 3.0% or less
  • Mn manganese 0.2% or more and 1.5% or less
  • P phosphorus
  • S sulfur
  • Cr chromium
  • Nickel is 0.1% or more and 3.0% or less
  • A1 anoremium
  • Ti titanium
  • O oxygen
  • N Nonrogen
  • the balance consists of steel consisting of Fe (iron) and unavoidable impurities, and has been tempered after quenching or carbonitriding It has a structure, hardness after tempering is HRC 58 or more, and maximum carbide size is 8 ⁇ m or less.
  • the high-temperature rolling bearing component of the present invention has the above-described composition, if it is subjected to quenching and tempering, excellent rolling fatigue life can be obtained in a foreign matter-mixed environment without carbonitriding. Therefore, the carbonitriding treatment can be omitted, and the production cost can be reduced.
  • steels of the above composition are less expensive than precipitation hardened bearing steels such as M50.
  • the tempering temperature is from 180 ° C to 350 ° C. Since rolling bearings are usually used at a temperature of about 100 ° C, the tempering temperature must be at least 180 ° C.
  • C is an essential element for ensuring strength as a rolling bearing, and must be contained at least 0.6% in order to maintain the hardness after a given heat treatment. Limited to 6%. Also, in the present invention, carbides play an important role in rolling fatigue life as described later, but if the C content exceeds 1.3%, large carbides are generated, Since it was found that the fatigue life was reduced, the upper limit of the C content was limited to 1.3%.
  • Si is desirably added because it has the effect of suppressing softening at high temperatures and improving the heat resistance of rolling bearings.
  • the effect cannot be obtained if the Si content is less than 0.3%, so the lower limit of the Si content is limited to 0.3%.
  • the heat resistance improves with an increase in the Si content, the effect saturates even if it is contained in a large amount exceeding 3.0%, and decreases in hot workability and machinability. Therefore, the upper limit of the Si content was limited to 3.0%.
  • Mn is an element used for deoxidation in the production of steel, and is also an element that improves hardenability.It is necessary to add 0.2% or more to obtain this effect.
  • the lower limit of the Mn content was limited to 0.2%. However, if it is contained in a large amount exceeding 1.5%, machinability is greatly reduced, so the upper limit of the Mn content was limited to 1.5%.
  • the upper limit of the content is set to 0.03%.
  • the upper limit of the S content is set to 0.03%.
  • S has a harmful surface as described above, but also has the effect of improving the machinability. Therefore, it is desirable to reduce S as much as possible, but if it is contained up to 0.005%, it is allowable. Is done.
  • C ⁇ ⁇ is an element that plays an important role in the present invention, and is added to improve hardenability, secure hardness by carbide and improve life. Since the addition of 0.3% or more is necessary in order to obtain a predetermined carbide, the lower limit of the Cr content is limited to 0.3%. However, if it is contained in a large amount exceeding 5.0%, large carbides are formed and the rolling fatigue life is reduced, so the upper limit of the Cr content was limited to 5.0%.
  • A1 is used as a deoxidizing agent in the production of steel, but it is desirable to reduce it because hard oxide-based inclusions are formed and the rolling fatigue life is reduced.
  • the upper limit of the A1 content was limited to 0.050%.
  • the lower limit of the A1 content is preferably limited to 0.005%.
  • T i, O and N form oxides and nitrides in the steel and become the starting point of fatigue fracture as non-metallic inclusions, reducing the rolling fatigue life.
  • N: 0.01 5% was set as the upper limit of each element.
  • Ni content (0.1% or more and 3.0% or less) Ni is an element that plays an important role in the present invention, and in particular, suppresses the structural change in the rolling fatigue process when used in a high-temperature environment, and also suppresses the decrease in hardness in the high-temperature region. It has the effect of improving the rolling fatigue life. In addition, Ni improves toughness, improves life under foreign material environments, and is effective in improving corrosion resistance. For this reason, since it is necessary to contain Ni at 0.1% or more, the lower limit of the Ni content is limited to 0.1%. However, if a large amount of Ni is contained in excess of 3.0%, a large amount of residual austenite is generated during the quenching process, and a predetermined hardness cannot be obtained, and the cost of steel material rises. Was limited to 3.0%.
  • Bearings used in high-temperature areas are generally subjected to tempering at a temperature equal to or higher than the environmental temperature in order to stabilize the dimensions in the operating environment.
  • the inventors of the present invention conducted detailed adjustments on the tempering hardness and rolling fatigue life at a temperature of 200 ° C. As a result, a correlation was found between the tempering hardness and the rolling fatigue life, and the tempering hardness was reduced. It was confirmed that the higher the value, the longer the rolling fatigue life tends to be. In particular, when the tempering hardness is the same, it was found that a bearing whose tempering treatment was performed at a higher temperature has a longer life, and a bearing whose tempering hardness is higher even at a high temperature has a longer life. Was done.
  • the carbides maintain the hardness during tempering, suppress the microstructural changes during rolling fatigue, and have an effect on improving the rolling fatigue life.
  • the maximum dimensions of carbide and the rolling fatigue life at a depth of 0.1 mm from the bearing surface were investigated, and as a result, the life tended to decrease when large carbides were present. It has been clarified that if large carbides larger than m remain, the life is suddenly shortened, so the maximum size of carbides is specified at 8 m.
  • the steel material is 0.05% or more and 0.25% by mass. /. It further contains at least one of Mo less than and less than 0.05% and less than 1.0% of V.
  • the rolling fatigue life can be further improved in a foreign substance mixed environment and a high temperature environment, and the hardness after tempering can be improved.
  • the reasons for limiting the chemical components will be described.
  • Mo has the effect of improving the hardenability of steel and preventing softening during tempering by forming a solid solution in the carbide.
  • Mo is added because it has been found to have an effect of improving the rolling fatigue life at high temperatures.
  • the Mo content was limited to less than 0.25%. If the content of Mo is less than 0.05%, there is no effect on carbide formation, so the lower limit of the Mo content was limited to 0.05%.
  • V combines with carbon to precipitate fine carbides, promotes the refinement of crystal grains, and has the effect of improving strength and toughness.
  • the addition of V improves the heat resistance of steel materials, It suppresses softening, improves rolling fatigue life, and reduces life variability. Since the V content at which this effect is obtained is 0.05% or more, the lower limit of the V content is limited to 0.05%. However, if a large amount of V is contained in excess of 1.0%, machinability and hot workability are reduced, so the upper limit of the V content is limited to 1.0%.
  • the steel material having the chemical composition shown in Table 1 was melted by a vacuum induction furnace, forged into a steel ingot having a weight of 150 kg, and then heated and maintained at a temperature of 1200 ° C for 3 hours for hot forging. Was carried out to produce a round bar having a diameter of 50 mm. After normalizing the round bar material at 850 ° C for 1 hour as a normalizing process, it is air-cooled to further facilitate cutting. 790 as softening treatment. After holding at C for 6 hours, the material was cooled down to 650 ° C at a cooling rate of 10 ° C / hour and softened to cool to room temperature in the air.
  • CD 12 1.01 0.50 0.35 0.017 0.021 0.79 4.51 ⁇ 0.021 0.0025 0.0011 0.010
  • V 22 1.10 0.55 0.15 0.017 0.020 1.00 0.22 0.01 0.02 0.003 0.0020 0.0010 0.009
  • a cylindrical test piece with a diameter of 20 mm and a length of 100 mm was prepared by machining from a material with a diameter of 5 O mm. did.
  • the quenching process is performed by heating in a salt furnace, soaking at 850 ° C for 30 minutes,
  • the carbonitriding process using a gas atmosphere furnace used in ordinary production processes 1 carbon potential in RX gas atmosphere. 0 to 1.2%, the amount of NH 3. 5 to a 1 0% 8 After being kept at 50 ° C for 60 minutes, it was quenched in oil. Thereafter, tempering was performed at 350 ° C. for 120 minutes.
  • a 10 mm-thick disk-shaped test piece was cut from the center of the quenched and tempered test piece or the test piece that was tempered after carbonitriding, and both sides were polished by wet polishing.
  • a test piece for hardness measurement was prepared.
  • the hardness was measured at a position 2 mm deep from the surface in the cross section of the test piece using a mouth-well hardness tester, and the average value at seven points was determined as the tempered hardness.
  • the test piece used for the life evaluation was a ring-shaped thrust-type rolling fatigue life test piece with an outer diameter of 47 mm, an inner diameter of 29 mm, and a thickness of 7 mm, which was machined from a 50 mm diameter round bar material. Roughed.
  • both surfaces of the test piece were polished to a mirror finish.
  • the machining allowance for polishing was set to 0.1 mm on both sides.
  • the rolling fatigue life test was performed using a thrust rolling fatigue life tester. Table 2 shows the conditions of the test. The test was performed under normal temperature environment and at 200 ° C environment, and was also performed under an environment in which the environment in which foreign substances were mixed was reproduced. Table 2
  • the fatigue test was repeated 15 times under the same conditions, and the life when the cumulative damage probability in the Weibull probability was 10% was determined as the life of each material.
  • the comparative example No. 13 in Table 2 is a general-purpose SUJ2, and the life value of each material is described as a ratio when the life of the quenched and tempered material is set to 1.0.
  • Thrust-type rolling fatigue life specimens were used to measure the carbides present in the steel.
  • a cross section of the ring was cut from a test piece processed into a thrust rolling fatigue life test piece by performing various heat treatments, and a micro test piece for structure observation was manufactured.
  • the specimen was mirror-finished and corroded by Picral etchant to observe carbides.
  • carbide at a depth of 0.1 mm from the surface layer of the rolling contact surface was observed with an optical microscope, and the largest carbide in a visual field area of 50 mm 2 was measured.
  • Table 3 shows the results of the above-mentioned tempering hardness at 350 ° C, rolling fatigue life at room temperature and 200 ° C, rolling fatigue life under foreign matter-contaminated conditions, and the maximum carbide size.
  • Table 4 shows comparative examples. Table 3
  • the present invention can be advantageously applied to a high-temperature rolling bearing component used in a foreign substance-mixed environment and a high-temperature environment.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Rolling Contact Bearings (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

Cette invention concerne une pièce de roulement à billes résistant aux hautes températures, laquelle se compose d'un matériau à base d'acier qui comprend, sous forme d'alliage, les éléments suivants: d'au moins 0,6 à pas plus de 1,3 % en poids de C; d'au moins 0,3 à pas plus de 3,0 % en poids de Si; d'au moins 0,2 à pas plus de 1,5 % en poids de Mn; jusqu'à 0,03 % en poids de P; jusqu'à 0,03 % en poids de S; d'au moins 0,3 à pas plus de 5,0 % en poids de Cr; d'au moins 0,1 à pas plus de 3,0 % en poids de Ni; jusqu'à 0,05 % en poids d'Al; jusqu'à 0,003 % en poids de Ti; jusqu'à 0,0015 % en poids d'O; et jusqu'à 0,015 % en poids de N, les composants restants consistant en du Fe et en des impuretés inévitables. Ce matériau possède une structure qui est obtenue par trempage après avoir été durci ou carbonitruré, la dureté de trempage étant d'au moins 58 HRC, tandis que la taille maximale des particules de carbure est de 8 νm. Il est ainsi possible de produire une pièce de roulement à billes résistant aux hautes températures qui possède une excellente résistance à la fatigue en roulement, même dans des conditions où règnent de hautes températures et où des matières étrangères viennent se mélanger, et possède un coût réduit.
PCT/JP1999/006253 1998-11-11 1999-11-10 Piece de roulement a billes resistant aux hautes temperatures WO2000028102A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CA002316183A CA2316183C (fr) 1998-11-11 1999-11-10 Piece de roulement a billes resistant aux hautes temperatures
DE19982613T DE19982613B3 (de) 1998-11-11 1999-11-10 Hochtemperatur-Wälzlagerteil
KR1020007007602A KR20010034008A (ko) 1998-11-11 1999-11-10 고온용 회전 베어링 부품

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP10/320435 1998-11-11
JP32043598 1998-11-11

Publications (1)

Publication Number Publication Date
WO2000028102A1 true WO2000028102A1 (fr) 2000-05-18

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KR (1) KR20010034008A (fr)
CA (1) CA2316183C (fr)
DE (1) DE19982613B3 (fr)
WO (1) WO2000028102A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2384833A (en) * 2001-12-27 2003-08-06 Nsk Ltd Carburized/carbonitrized bearing elements

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Publication number Priority date Publication date Assignee Title
JP2003206708A (ja) * 2002-01-16 2003-07-25 Ntn Corp ローラ付きカムフォロア
EP1705392B2 (fr) 2003-11-18 2016-08-31 NTN Corporation Roulement a rotule sur deux rangees de rouleaux et dispositif de support d'un arbre principal de turbo-generateur d'eolienne
CN110462083B (zh) 2017-08-18 2021-06-01 国立大学法人大阪大学 高硬度并且韧性优异的钢
DE102017216762A1 (de) * 2017-09-21 2019-03-21 Thyssenkrupp Ag Werkstoff und Herstellungsverfahren für Wälzlagerkomponenten

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GB2384833B (en) * 2001-12-27 2004-02-11 Nsk Ltd Rolling bearing
US7137741B2 (en) 2001-12-27 2006-11-21 Nsk Ltd. Rolling bearing

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CA2316183A1 (fr) 2000-05-18
CA2316183C (fr) 2008-07-15
DE19982613T1 (de) 2001-03-08
KR20010034008A (ko) 2001-04-25

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