WO1998041663A1 - High-performance rolling bearings or rolling components - Google Patents

High-performance rolling bearings or rolling components Download PDF

Info

Publication number
WO1998041663A1
WO1998041663A1 PCT/DE1998/000672 DE9800672W WO9841663A1 WO 1998041663 A1 WO1998041663 A1 WO 1998041663A1 DE 9800672 W DE9800672 W DE 9800672W WO 9841663 A1 WO9841663 A1 WO 9841663A1
Authority
WO
WIPO (PCT)
Prior art keywords
rolling
roller bearing
components
performance
performance roller
Prior art date
Application number
PCT/DE1998/000672
Other languages
German (de)
French (fr)
Other versions
WO1998041663B1 (en
Inventor
Franz-Josef Ebert
Edgar Streit
Werner Trojahn
Hans-Werner Zoch
Original Assignee
Fag Aircraft/Super Precision Bearings Gmbh
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 Fag Aircraft/Super Precision Bearings Gmbh filed Critical Fag Aircraft/Super Precision Bearings Gmbh
Publication of WO1998041663A1 publication Critical patent/WO1998041663A1/en
Publication of WO1998041663B1 publication Critical patent/WO1998041663B1/en

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
    • 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
    • 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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
    • 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
    • F16C33/303—Parts of ball or roller bearings of hybrid bearings, e.g. rolling bearings with steel races and ceramic rolling elements
    • 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
    • F16C33/581—Raceways; Race rings integral with other parts, e.g. with housings or machine elements such as shafts or gear wheels
    • 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
    • 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
    • C21D1/06—Surface hardening
    • C21D1/09—Surface hardening by direct application of electrical or wave energy; by particle radiation
    • C21D1/10—Surface hardening by direct application of electrical or wave energy; by particle radiation by electric induction
    • 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
    • F16C2204/70—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
    • F16C2240/00—Specified values or numerical ranges of parameters; Relations between them
    • F16C2240/90—Surface areas
    • 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
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms
    • F16H25/24—Elements essential to such mechanisms, e.g. screws, nuts
    • F16H2025/249—Special materials or coatings for screws or nuts
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Definitions

  • the invention relates to high-performance roller bearings or components subject to rolling stress according to the preamble of claim 1.
  • DE 39 01 470 C1 describes a cold work steel which is said to be high-strength and corrosion-resistant.
  • the carbon content should be limited to 0.10% to 0.40% and the carbon / nitrogen ratio should preferably be set to values between 0.3 and 1.0.
  • the use of such steel for ball bearings for the food industry or vehicle construction is also addressed, the use for high-performance roller bearings is ruled out because of the high levels of purity, high hardness, high hot hardness, special residual austenite content and excessively hard structural components required there. This also applies to a martensitic chrome steel according to DE 42 12 966 C2.
  • the content of residual austenite is within the range of 5% to 15% in a range of 4% z. B. adjusted and controlled between 6% and 10%.
  • the hard structural components are limited to a maximum size of 15 ⁇ m, preferably less than 10 ⁇ m, by checking the steel before the heat treatment, while the residual austenite content is checked after the heat treatment.
  • Particularly advantageous is the fact that compressive residual stresses occur in the surface layer that is subjected to rollover, which are based on the conversion of the residual austenite to martensite as a result of the rollover. Corrosion protection, wear resistance and fatigue resistance are increased by a factor of 5 to 10 compared to conventional bearings.
  • Figure 1 shows an example of a bearing for the aerospace industry
  • Figure 2 shows the structure of a bearing according to the invention
  • Figure 3 shows an example of a ball screw for the air
  • Figure 4 shows the structure of a component according to the invention, which was treated according to claim 8
  • FIG. 5 shows an example of an integrated component with toothings and rolling function surfaces.
  • the inner ring of the ball bearing with 1 and the outer ring with 2 is designated.
  • the balls 3 are arranged, which are kept at a distance from the solid cage 4 and guide it.
  • FIG. 2 clearly shows the zone 7 which is located under raceway 5 and which is gray with respect to the core structure 6, which indicates the conversion of the residual austenite into martensite, which result from the rollovers and in which the residual compressive stresses develop.
  • the spindle nut is 1 and the spindle 2. Both have raceways 3 and 4, in which balls 5 roll.
  • FIG. 4 clearly shows the corrosion, fatigue and wear-resistant track 4 of a component treated according to claim 8, which has a hardened dark zone 7 compared to the core structure 6.
  • the zones subjected to rolling are designated 3, 4 and 11, the toothings 11 being integrated in the component 9.
  • the bearing outer rings 8 surround the balls 5 or rollers 10.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Ceramic Engineering (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

In order to obtain a high-performance rolling bearing or rolling components which display enhanced rust-resistant, heat-resistant, abrasive-resistant and fatigue-resistant properties in relation to conventional bearings, at least one of the rings (1, 2) and/or roll bodies (3) or roll partners (1, 2, 5, 8, 10, 11) are manufactured from remelted rust-resistant heat-resistant steel, with an alloy content of at least 0.15-0.50 % carbon, 0,15-0.50 % nitrogen, 13.0-17.0 % chrome and at least 0.5 % molybdenum, wherein the total carbon and nitrogen content ranges from 0.60 to 0.80 %.

Description

Hochieistungswälziager bzw. wälzbeanspruchte BauteileHochieistungswälziager or rolling stressed components
Die Erfindung betrifft Hochleistungswälzlager bzw. wälzbeanspruchte Bauteile nach dem Oberbegriff des Anspruchs 1.The invention relates to high-performance roller bearings or components subject to rolling stress according to the preamble of claim 1.
An Wälzlagern bzw. wälzbeanspruchte Bauteile z. B. für die Luft- und Raum- fahrt werden immer höhere Anforderungen an die Korrosionsbeständigkeit, die Lebensdauer, die Tragfähigkeit und die Warmfestigkeit gestellt. Dabei ergibt sich in manchen Fällen die Konstellation, daß die Maßnahmen zur Steigerung der einen Eigenschaft bei einer anderen negativen Auswirkungen zeigt. Die bisher üblichen Werkstoffe z. B. für Fluglager bieten immer nur eine der gefor- derten Eigenschaften in ausreichendem Maße: entweder Korrosionsbeständigkeit wie der Chromstahl 4400 oder Ermüdungsfestigkeit wie die Stähle 100Cr6, M50 oder M50NiL. Ab einem bestimmten Niveau führt die Verbesserung der einen Eigenschaft zur Verschlechterung der anderen.On rolling bearings or components subject to rolling z. B. for the aerospace industry, there are increasing demands on corrosion resistance, durability, load capacity and heat resistance. In some cases, this results in the constellation that the measures to increase one property have another negative effect. The usual materials z. B. for flight bearings always only offer one of the required properties to a sufficient extent: either corrosion resistance such as chrome steel 4400 or fatigue resistance such as steels 100Cr6, M50 or M50NiL. Above a certain level, the improvement of one property leads to the deterioration of the other.
In der DE 39 01 470 C1 wird ein Kaltarbeitsstahl beschrieben, der hochfest und korrosionsbeständig sein soll. Dabei soll der Gehalt an Kohenstoff auf 0,10 % bis 0,40 % begrenzt sein und das Verhältnis Kohlenstoff / Stickstoff soll vorzugsweise auf Werte zwischen 0,3 und 1 ,0 eingestellt werden. Zwar ist auch die Verwendung eines solchen Stahls für Kugellager für die Lebensmittelindustrie oder den Fahrzeugbau angesprochen, der Einsatz für Hochleistungswälz- lager scheidet aber wegen der dort geforderten hohen Reinheitsgrade, hohen Härte, hohen Warmhärte, speziellen Restaustenitgehalte und zu großer harter Gefügebestandteile aus. Dies gilt auch für einen martensitischen Chromstahl nach der DE 42 12 966 C2.DE 39 01 470 C1 describes a cold work steel which is said to be high-strength and corrosion-resistant. The carbon content should be limited to 0.10% to 0.40% and the carbon / nitrogen ratio should preferably be set to values between 0.3 and 1.0. Although the use of such steel for ball bearings for the food industry or vehicle construction is also addressed, the use for high-performance roller bearings is ruled out because of the high levels of purity, high hardness, high hot hardness, special residual austenite content and excessively hard structural components required there. This also applies to a martensitic chrome steel according to DE 42 12 966 C2.
Es ist deshalb Aufgabe der Erfindung, ein Hochleistungswälzlager bzw. wälz- beanspruchte Bauteile der eingangs genannten Art aufzuzeigen, das rostfrei, warmfest und ermüdungsresistent ist und gegenüber herkömmlichen Lagern eine deutliche Verbesserung dieser kombinierten Eigenschaften zeigt. Die Lösung dieser Aufgabe gelingt mit den im kennzeichnenden Teil des Anspruchs 1 angegebenen Merkmalen. Vorteilhafte Weiterbildungen sind in den Ansprüchen 2 bis 13 angegeben.It is therefore an object of the invention to show a high-performance roller bearing or components subject to rolling stress of the type mentioned at the outset, which is rustproof, heat-resistant and fatigue-resistant and shows a marked improvement in these combined properties compared to conventional bearings. This object is achieved with the features specified in the characterizing part of claim 1. Advantageous further developments are given in claims 2 to 13.
Es hat sich gezeigt, daß die Begrenzung des Summengehaltes von Kohlenstoff und Stickstoff auf 0,60 % bis 0,80 % und das Aushärten durch kohärente Ausscheidungen bei der Wärmebehandlung und eine Einstellung des Restaustenit- gehaltes zwischen 5 % und 15 % die speziellen Anforderungen an ein Hochleistungswälzlager besonders gut erfüllen.It has been shown that the limitation of the total content of carbon and nitrogen to 0.60% to 0.80% and the hardening through coherent precipitates in the heat treatment and an adjustment of the residual austenite content between 5% and 15% meet the special requirements fulfill a high-performance roller bearing particularly well.
Je nach Anwendungsfall (z. B. Raumfahrt oder Werkzeugmaschinenspindel) wird der Gehalt des Restaustenits innerhalb des Bereichs von 5 % bis 15 % in einer Spanne von 4 % z. B. zwischen 6 % und 10 % eingestellt und kontrolliert.Depending on the application (e.g. space travel or machine tool spindle), the content of residual austenite is within the range of 5% to 15% in a range of 4% z. B. adjusted and controlled between 6% and 10%.
Die Begrenzung der harten Gefügebestandteile (Carbide, Nitride und Mischphasen) auf eine maximale Größe von 15 μm, vorzugsweise kleiner 10 μm, erfolgt dabei durch Kontrolle des Stahles vor der Wärmebehandlung, während der Restaustenitgehalt nach der Wärmebehandlung überprüft wird. Besonders vorteilhaft ist die Tatsache, daß in der durch Überrollung beanspruchten Randschicht Druckeigenspannungen auftreten, die auf der Umwandlung des Restaustenits in Martensit in Folge der Überrollung beruhen. Der Korrosions- schütz, die Verschleißfestigkeit und die Ermüdungsresistenz ist sind gegenüber herkömmlichen Lagern etwa um den Faktor 5 bis 10 erhöht.The hard structural components (carbides, nitrides and mixed phases) are limited to a maximum size of 15 μm, preferably less than 10 μm, by checking the steel before the heat treatment, while the residual austenite content is checked after the heat treatment. Particularly advantageous is the fact that compressive residual stresses occur in the surface layer that is subjected to rollover, which are based on the conversion of the residual austenite to martensite as a result of the rollover. Corrosion protection, wear resistance and fatigue resistance are increased by a factor of 5 to 10 compared to conventional bearings.
Die Erfindung soll an Hand von Ausführungsbeispielen erläutert werden:The invention will be explained using exemplary embodiments:
Figur 1 zeigt ein Beispiel eines Lagers für die Luft- und RaumfahrtFigure 1 shows an example of a bearing for the aerospace industry
Figur 2 zeigt das Gefüge eines erfindungsgemäßen LagersFigure 2 shows the structure of a bearing according to the invention
Figur 3 zeigt ein Beispiel eines Kugelgewindetriebes für die Luft- undFigure 3 shows an example of a ball screw for the air and
RaumfahrtSpace travel
Figur 4 zeigt das Gefüge eines erfindungsgemäßen Bauteils, welches gemäß Anspruch 8 behandelt wurdeFigure 4 shows the structure of a component according to the invention, which was treated according to claim 8
Figur 5 zeigt ein Beispiel eines integrierten Bauteils mit Verzahnungen und Wälzfunktionsflächen. In Figur 1 ist der Innenring des Kugellagers mit 1 und der Außenring mit 2 bezeichnet. Dazwischen sind die Kugeln 3 angeordnet, die von dem Massivkäfig 4 auf Abstand gehalten werden und diesen führen.FIG. 5 shows an example of an integrated component with toothings and rolling function surfaces. In Figure 1, the inner ring of the ball bearing with 1 and the outer ring with 2 is designated. In between, the balls 3 are arranged, which are kept at a distance from the solid cage 4 and guide it.
In Figur 2 ist deutlich die unter Laufbahn 5 befindliche, gegenüber dem Kern- gefüge 6 graue Zone 7 zu erkennen, welche auf die Umwandlung des Re- staustenits in Martensit hinweist, die von den Überrollungen herrühren und in welcher sich die Druckeigenspannungen ausbilden.FIG. 2 clearly shows the zone 7 which is located under raceway 5 and which is gray with respect to the core structure 6, which indicates the conversion of the residual austenite into martensite, which result from the rollovers and in which the residual compressive stresses develop.
In Figur 3 ist Spindelmutter mit 1 und die Spindel mit 2 bezeichnet. Beide wei- sen Laufbahnen 3 und 4 auf, in denen sich Kugeln 5 abwälzen.In Figure 3, the spindle nut is 1 and the spindle 2. Both have raceways 3 and 4, in which balls 5 roll.
In Figur 4 ist deutlich die korrosions-, ermüdungs- und verschleißfeste Laufbahn 4 eines nach Anspruch 8 behandelten Bauteils zu erkennen, das gegenüber dem Kemgefüge 6 eine gehärtete dunkle Zone 7 aufweist.FIG. 4 clearly shows the corrosion, fatigue and wear-resistant track 4 of a component treated according to claim 8, which has a hardened dark zone 7 compared to the core structure 6.
In Figur 5 sind die wälzbeanspruchten Zonen mit 3, 4 und 11 bezeichnet, wobei die Verzahnungen 11 in das Bauteil 9 integriert sind. Die Lageraußenringe 8 umgeben die Kugeln 5 bzw. Rollen 10. In FIG. 5, the zones subjected to rolling are designated 3, 4 and 11, the toothings 11 being integrated in the component 9. The bearing outer rings 8 surround the balls 5 or rollers 10.

Claims

Schutzansprüche Protection claims
1. Hochleistungswälzlager bzw. wälzbeanspruchte Bauteile, insbesondere für die Luft- und Raumfahrt oder als Genauigkeitslager für Werkzeugmaschinenspindeln, erstere bestehend aus mindestens einem Innenring, einem Außenring und dazwischen angeordneten Wälzkörpern, die ge- gebenenfalls von einem Käfig auf Abstand gehalten werden, dadurch gekennzeichnet, daß mindestens einer der Ringe (1 , 2) und/oder die Wälzkörper (3) bzw. Wälzpartner (1 , 2, 5, 8, 9, 10, 11 ) aus einem umgeschmolzenen, rostfreien und warmfesten Stahl gefertigt sind, der einen Legierungsgehalt von mindestens1. High-performance roller bearings or components subject to rolling stress, in particular for the aerospace industry or as precision bearings for machine tool spindles, the former consisting of at least one inner ring, one outer ring and rolling elements arranged therebetween, which are optionally kept at a distance from a cage, characterized in that that at least one of the rings (1, 2) and / or the rolling elements (3) or rolling partners (1, 2, 5, 8, 9, 10, 11) are made of a remelted, rustproof and heat-resistant steel which has an alloy content of at least
- 0,15 % bis 0,50 % Kohlenstoff- 0.15% to 0.50% carbon
- 0,15 % bis 0,50 % Stickstoff- 0.15% to 0.50% nitrogen
- 13,0 % bis 17,0 % Chrom und- 13.0% to 17.0% chromium and
- mindestens 0,5 % Molybdän aufweist, wobei der Summengehalt von Kohlenstoff und Stickstoff zwischen 0,60 % und 0,80 % liegt.- Has at least 0.5% molybdenum, the total content of carbon and nitrogen being between 0.60% and 0.80%.
2. Hochleistungswälzlager bzw. wälzbeanspruchte Bauteile nach Anspruch2. High-performance roller bearing or components subject to rolling stress according to claim
1 , dadurch gekennzeichnet, daß der Ring (1 , 2) und/oder Wälzkörper (3) bzw. Wälzpartner (1 , 2, 5, 8, 9, 10, 11 ) bei 970° C - 1050° C gehärtet und ein oder mehrmals über 400° C angelassen und dazwischen unter -60° C gekühlt wird, wobei durch kohärente Ausscheidungen die Warm- festigkeit gesteigert wird.1, characterized in that the ring (1, 2) and / or rolling elements (3) or rolling partners (1, 2, 5, 8, 9, 10, 11) hardened at 970 ° C - 1050 ° C and one or tempered several times over 400 ° C and cooled in between below -60 ° C, whereby the heat resistance is increased by coherent precipitations.
3. Hochleistungswälzlager bzw. wälzbeanspruchte Bauteile nach Anspruch3. High-performance roller bearing or components subject to rolling stress according to claim
2, dadurch gekennzeichnet, daß der Ring (1 , 2) und/oder Wälzkörper (3) bzw. Wälzpartner (1 , 2, 5, 8, 9, 10, 11) auf einen Restaustenitgehalt zwischen 5 % und 15 % eingestellt und kontrolliert wird. 2, characterized in that the ring (1, 2) and / or rolling elements (3) or rolling partners (1, 2, 5, 8, 9, 10, 11) are set and checked for a residual austenite content between 5% and 15% becomes.
4. Hochleistungswälzlager bzw. wälzbeanspruchte Bauteile nach Anspruch 3, dadurch gekennzeichnet, daß der Gehalt des Restaustenits innerhalb des Bereichs zwischen 5 % und 15 % in einer Spanne von 4 % einge- stellt und konkrolliert wird.4. High-performance roller bearing or components subject to rolling stress according to claim 3, characterized in that the content of the residual austenite is set and concreted within a range of 4% within a range between 5% and 15%.
5. Hochleistungswälzlager bzw. wälzbeanspruchte Bauteile nach Anspruch 3, dadurch gekennzeichnet, daß der Ring (1 , 2) und/oder Wälzkörper (3) eine Härte bei Raumtemperatur von minstestens 56 HRC aufweist.5. High-performance roller bearing or components subject to rolling stress according to claim 3, characterized in that the ring (1, 2) and / or rolling elements (3) has a hardness at room temperature of at least 56 HRC.
6. Hochleistungswälzlager bzw. wälzbeanspruchte Bauteile nach Anspruch 1 , dadurch gekennzeichnet, daß die harten Gefügebestandteile6. High-performance roller bearing or components subject to rolling stress according to claim 1, characterized in that the hard structural components
(Carbide, Nitride und Mischphasen) auf eine maximale Größe von 15 μm überwacht und bei Überschreiten aussortiert werden.(Carbides, nitrides and mixed phases) are monitored for a maximum size of 15 μm and sorted out if exceeded.
7. Hochieistungswälzlagr nach Anspruch 6, dadurch gekennzeichnet, daß die harten Gefügebestandteile (Carbide, Nitride und Mischphasen) auf eine Größe von vorzugsweise kleiner 10 μm überwacht und bei Überschreiten aussortiert werden.7. Hochieistungswälzlagr according to claim 6, characterized in that the hard structural components (carbides, nitrides and mixed phases) are monitored for a size of preferably less than 10 microns and sorted out if exceeded.
8. Hochleistungswälzlager nach Anspruch 3, dadurch gekennzeichnet, daß in der durch Überrollung beanspruchten Randschicht (7) Druckeigenspannungen vorhanden sind, die auf der Umwandlung des Restaustenits in Martensit in Folge der Überrollung beruhen.8. High-performance roller bearing according to claim 3, characterized in that residual compressive stresses are present in the edge layer (7) claimed by the rollover, which are based on the conversion of the residual austenite into martensite as a result of the rollover.
9. Hochleistungswälzlager bzw. wälzbeanspruchte Bauteile nach Anspruch 1 , dadurch gekennzeichnet, daß die Wärmebehandlung durch Anwendung partieller Erwärmung zum Härten und/oder Anlassen z. B. durch Induktion oder Laserstrahl nur an einem Teil des Querschnitts erfolgt.9. High-performance roller bearing or components subject to rolling stress according to claim 1, characterized in that the heat treatment by application of partial heating for hardening and / or tempering z. B. by induction or laser beam only on part of the cross section.
10. Hochleistungswälzlager nach Anspruch 1 , dadurch gekennzeichnet, daß der Wälzkörpersatz aus Stahl und/oder Keramik wie Siliziumnitrid, Siliziumkarbid oder Aluminiumoxid besteht.10. High-performance roller bearing according to claim 1, characterized in that the rolling element set consists of steel and / or ceramic such as silicon nitride, silicon carbide or aluminum oxide.
11. Hochleistungswälzlager bzw. wälzbeanspruchte Bauteile nach Anspruch 1 , dadurch gekennzeichnet, daß andere Flächen als die Wälzkontaktflä- chen in ihrer chemischen Zusammensetzung oder Wärmebehandlung so modifiziert werden, daß sich im oberflächennahen Bereich ein Gefüge ausbildet, das zu einem wesentlichen Teil aus Karbiden und/oder Kar- bonitriden besteht.11. High-performance roller bearing or components subject to rolling stress according to claim 1, characterized in that surfaces other than the roller contact surfaces are modified in their chemical composition or heat treatment so that there is a structure in the area near the surface forms, which largely consists of carbides and / or carbonitrides.
12. Wälzbeanspruchte Bauteile nach Anspruch 1 , dadurch gekennzeichnet, daß die harten Gefügebestandteile (Carbide, Nitride und Mischphasen) auf eine maximale Größe von 15 μm überwacht und bei Überschreiten aussortiert werden.12. Rolling stressed components according to claim 1, characterized in that the hard structural components (carbides, nitrides and mixed phases) are monitored for a maximum size of 15 microns and sorted out when exceeded.
13. Wälzbeanspruchte Bauteile nach Anspruch 3, dadurch gekennzeichnet, daß in der durch Wälzkontakt beanspruchten Randschicht (3, 4, 7, 11 ) Druckeigenspannungen vohranden sind, die auf der Umwandlung des Restaustenits in Martensit in Folge der Wälzbeanspruchung beruhen. 13. Rolling stressed components according to claim 3, characterized in that in the edge layer stressed by rolling contact (3, 4, 7, 11) residual compressive stresses are present, which are based on the conversion of the residual austenite into martensite as a result of the rolling stress.
PCT/DE1998/000672 1997-03-15 1998-03-06 High-performance rolling bearings or rolling components WO1998041663A1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19710909 1997-03-15
DE19710909.8 1997-03-15
DE19712131 1997-03-22
DE19712131.4 1997-03-22

Publications (2)

Publication Number Publication Date
WO1998041663A1 true WO1998041663A1 (en) 1998-09-24
WO1998041663B1 WO1998041663B1 (en) 1998-11-26

Family

ID=26034904

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1998/000672 WO1998041663A1 (en) 1997-03-15 1998-03-06 High-performance rolling bearings or rolling components

Country Status (1)

Country Link
WO (1) WO1998041663A1 (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10019516A1 (en) * 2000-04-20 2001-10-31 Hoehn Bernd Robert Toothed wheel used for a gearing is made from a rust-free steel containing carbon, nitrogen, chromium, and molybdenum
DE10062315A1 (en) * 2000-12-14 2002-07-18 Kordel Antriebstechnik Gmbh Wheel hub drive e.g. for fork lift truck, has drive motor arranged coaxial to running wheel's axle and running wheel supported on part of housing containing drive motor and at least one gear stage
EP1279847A1 (en) * 2001-07-24 2003-01-29 Koyo Seiko Co., Ltd. Rolling bearing
DE10327536A1 (en) * 2003-06-18 2005-01-05 General Motors Corp. (N.D.Ges.D. Staates Delaware), Detroit Rolling bearing arrangement, in particular, for a recirculation pump of a fuel cell system comprises lids rotating together with the motor shaft and axially bracketing the bearing
WO2006012895A1 (en) * 2004-08-04 2006-02-09 Schaeffler Kg Roller bearing
WO2008049410A1 (en) * 2006-10-25 2008-05-02 Schaeffler Kg Needle bearing
DE102010044436A1 (en) * 2010-09-06 2012-03-08 Lais Gmbh transmission
CN103468915A (en) * 2013-09-22 2013-12-25 常州苏特轴承制造有限公司 Heat treatment method of high-temperature-resistant rolling needle
EP3162903A1 (en) * 2015-10-26 2017-05-03 SKF Aerospace France Process of treatment of a ring for a bearing and a bearing
EP3901291A1 (en) 2020-04-24 2021-10-27 Schaeffler Technologies AG & Co. KG Machine element with a rolling contact surface and method for heat treatment of a machine element

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU67301A1 (en) * 1972-03-28 1973-07-27 Ugine Aciers NEW APPLICATIONS OF HIGH FREQUENCY STEELS
JPH05331615A (en) * 1992-05-29 1993-12-14 Ntn Corp Rolling bearing parts made of nonmagnetic steel
GB2284824A (en) * 1993-10-21 1995-06-21 Nsk Ltd Rolling bearing

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU67301A1 (en) * 1972-03-28 1973-07-27 Ugine Aciers NEW APPLICATIONS OF HIGH FREQUENCY STEELS
JPH05331615A (en) * 1992-05-29 1993-12-14 Ntn Corp Rolling bearing parts made of nonmagnetic steel
GB2284824A (en) * 1993-10-21 1995-06-21 Nsk Ltd Rolling bearing

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 18, no. 170 (C - 1182) 23 March 1994 (1994-03-23) *

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10019516A1 (en) * 2000-04-20 2001-10-31 Hoehn Bernd Robert Toothed wheel used for a gearing is made from a rust-free steel containing carbon, nitrogen, chromium, and molybdenum
DE10062315A1 (en) * 2000-12-14 2002-07-18 Kordel Antriebstechnik Gmbh Wheel hub drive e.g. for fork lift truck, has drive motor arranged coaxial to running wheel's axle and running wheel supported on part of housing containing drive motor and at least one gear stage
EP1279847A1 (en) * 2001-07-24 2003-01-29 Koyo Seiko Co., Ltd. Rolling bearing
US6858100B2 (en) 2001-07-24 2005-02-22 Koyo Seiko Co., Ltd. Rolling bearing
DE10327536A1 (en) * 2003-06-18 2005-01-05 General Motors Corp. (N.D.Ges.D. Staates Delaware), Detroit Rolling bearing arrangement, in particular, for a recirculation pump of a fuel cell system comprises lids rotating together with the motor shaft and axially bracketing the bearing
WO2006012895A1 (en) * 2004-08-04 2006-02-09 Schaeffler Kg Roller bearing
WO2008049410A1 (en) * 2006-10-25 2008-05-02 Schaeffler Kg Needle bearing
DE102010044436A1 (en) * 2010-09-06 2012-03-08 Lais Gmbh transmission
CN103468915A (en) * 2013-09-22 2013-12-25 常州苏特轴承制造有限公司 Heat treatment method of high-temperature-resistant rolling needle
EP3162903A1 (en) * 2015-10-26 2017-05-03 SKF Aerospace France Process of treatment of a ring for a bearing and a bearing
EP3901291A1 (en) 2020-04-24 2021-10-27 Schaeffler Technologies AG & Co. KG Machine element with a rolling contact surface and method for heat treatment of a machine element

Similar Documents

Publication Publication Date Title
DE102005060113B4 (en) Wheel bearing and method for producing the same
DE19955565B4 (en) Rolling arrangement and method for its production
DE4406252C2 (en) roller bearing
EP1276915A1 (en) Rolling bearing component
DE69228730T2 (en) Inventory components and processes for their manufacture
DE102005022730A1 (en) Rolling bearing ring, in particular for highly stressed roller bearings in aircraft engines, and method for its production
DE3919199C2 (en)
DE10147631A1 (en) Bearings for a main spindle of a machine tool
DE112015005630T5 (en) Bearing component and method
WO1998041663A1 (en) High-performance rolling bearings or rolling components
DE3221991C2 (en) Oil ring for internal combustion engines
DE112007002699B4 (en) Wheel bearing device for a vehicle
DE112019006504T5 (en) STEEL MATERIAL AS BASE MATERIAL FOR CARBONITRATED BEARING COMPONENTS
WO2003025233A1 (en) Steel parts and method for heat-treating steel parts
DE19546583B4 (en) Rod end bearing for aircraft
DE4327440C2 (en) Process for the thermochemical-thermal treatment of case hardening steels, quenched and tempered steels and rolling bearing steels
DE2937323A1 (en) BEARING ELEMENT FOR A JOINT IN TRIPOD DESIGN AND METHOD FOR THE PRODUCTION THEREOF
WO2008055477A2 (en) Method for the production of a rolling bearing ring, and rolling bearing ring
DE2810186C2 (en) Work roll for hot rolling non-ferrous metals and process for the production of the roll shell of such a work roll
DE3434743C2 (en)
DE69909940T2 (en) Martensitic stainless steel parts and process for their manufacture
DE19628825A1 (en) Roller bearing for use in air and space travel applications
DE4303884A1 (en) A process for producing machine components, in particular rolling bearing elements
DE626579C (en) Shaft journal hardened on the surface, in particular crankshaft journal
DE19629398A1 (en) Aerospace roller bearing 1

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): JP US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
NENP Non-entry into the national phase

Ref country code: JP

Ref document number: 1998540016

Format of ref document f/p: F

122 Ep: pct application non-entry in european phase