WO2013170995A1 - Élément de palier à roulement et procédé de traitement thermique d'un élément de palier à roulement - Google Patents

Élément de palier à roulement et procédé de traitement thermique d'un élément de palier à roulement Download PDF

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Publication number
WO2013170995A1
WO2013170995A1 PCT/EP2013/056642 EP2013056642W WO2013170995A1 WO 2013170995 A1 WO2013170995 A1 WO 2013170995A1 EP 2013056642 W EP2013056642 W EP 2013056642W WO 2013170995 A1 WO2013170995 A1 WO 2013170995A1
Authority
WO
WIPO (PCT)
Prior art keywords
bearing part
rolling bearing
heat treatment
temperature
rolling
Prior art date
Application number
PCT/EP2013/056642
Other languages
German (de)
English (en)
Inventor
Dieter Röll
Walter Götz
Reinhold GAUBMANN
Bernhard Wilm
Original Assignee
Schaeffler Technologies AG & Co. KG
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 Schaeffler Technologies AG & Co. KG filed Critical Schaeffler Technologies AG & Co. KG
Publication of WO2013170995A1 publication Critical patent/WO2013170995A1/fr

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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
    • C21D9/40—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rings; for bearing races
    • 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
    • C21D1/19—Hardening; Quenching with or without subsequent tempering by interrupted quenching
    • C21D1/20—Isothermal quenching, e.g. bainitic hardening
    • 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
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/002—Bainite
    • 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
    • F16C2326/00—Articles relating to transporting
    • F16C2326/01—Parts of vehicles in general
    • F16C2326/02—Wheel hubs or castors
    • 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
    • F16C33/583—Details of specific parts of races
    • F16C33/586—Details of specific parts of races outside the space between the races, e.g. end faces or bore of inner ring

Definitions

  • the invention relates to a rolling bearing part, in particular a bearing ring, and a method for heat treatment of a rolling bearing part and the use of a rolling bearing part.
  • DE 10 2007 044 950 B3 discloses a carbonitrided workpiece made of a hardening steel, which has a core zone with a bainite structure as its main constituent, and which is designed for a rolling load.
  • a marginal zone of the workpiece is a mixed structure of martensite and bainite, wherein the volume fraction of martensite is at least 20%.
  • the invention has the object of hardening roller bearing parts made of steel, in particular bearing rings of wheel bearings, particularly efficient and to produce predestined for a rolling load material properties.
  • the rolling bearing part is made of steel with a bainitic structure and a Restauste- nit content of 8 to 20%, with compressive residual stresses of at least 100 MPa to a depth of at least 100 ⁇ below the surface and the surface hardness of at least 59 HRC, in particular at least 60 HRC, is.
  • the structural composition of the heat-treated rolling bearing part is preferably the same over its entire cross-section.
  • the material properties mentioned are produced by first heating the rolling bearing part to the austenitizing temperature and then cooling it to a temperature above the martensite starting temperature and keeping it at that temperature, so that the formation of bainitic structure begins.
  • the transformation into bainitic structure is stopped before complete conversion by lowering the temperature of the rolling bearing part. This process of heat treatment is referred to as an interrupted isothermal transformation.
  • a chemical-thermal heat treatment of the rolling bearing part such as nitriding or carbonitriding, is not provided. After the said steps of the heat treatment, preferably neither renewed heating (tempering) nor deep cooling of the rolling bearing part takes place.
  • the particular advantage of the method according to the invention is that the duration of the heat treatment is significantly shortened compared to conventional methods.
  • the total process time is not more than six hours.
  • process times of less than three hours for example a process time of just one hour, can be achieved.
  • the short process time leads to an improved deformability of the rolling bearing part compared to a complete or even a stepped transformation.
  • the rolling bearing part has a very good rollover resistance and dirt resistance.
  • the temperature resistance is at least 120 ° C according to DIN 623 Part 1.
  • the roller bearing part according to the invention is designed for example as a bearing ring, in particular inner ring, a wheel bearing.
  • a bearing ring in particular inner ring
  • wheel bearing As prior art may be mentioned in this context, for example, the DE 10 2006 030 478 A1.
  • the rolling bearing part is a bearing ring of a wheel bearing, which has an end-face toothing, in particular a face toothing formed by non-cutting forming, wherein the bearing ring preferably directly adjoins a Wälznietbund, wel- rather the face toothing facing away from the bearing ring Side has.
  • wheel bearings are known in principle, for example, from DE 10 2005 009 938 A1, from DE 10 2005 016 427 A1, and from DE 10 2005 018 126 A1.
  • the internal compressive stresses in the roller bearing part namely bearing ring, in particular inner ring
  • the inner ring is widened noticeably. If there were no residual compressive stresses on the surface of the inner ring and near the surface near the surface, the expansion of the inner ring in this area would give rise to tensile stresses which had an unfavorable effect on the load capacity and durability of the rolling bearing. This undesirable effect is effectively counteracted by the residual compressive stresses in the edge zone of the bearing ring.
  • the printed matter Tensions which are in the mechanically unloaded bearing ring in said range of at least 100 MPa, ensure that even when assembled wheel bearing, that is expanded bearing ring still sustainable residual stresses, preferably only low tensile stresses in the edge zone of the bearing ring, which is a career for Rolling, typically balls or tapered rollers forms, are present.
  • the material of the rolling bearing part in particular bearing ring, for example, 100Cr6 (W3) or 100CrMn6 (W4) into consideration.
  • the material from which the rolling bearing part is made is a hardenable steel.
  • FIG. 1 shows a broken isothermal transformation in a ZTU diagram
  • FIG. 1 illustrates the process according to the invention (interrupted conversion) in a ZTU diagram (time-temperature conversion).
  • the workpiece that is to say the roller bearing part
  • the workpiece is cooled from a temperature which is at least at the level of the austenitizing temperature of 840 ° C. to a temperature which is above the martensite starting temperature.
  • the austenitic structure is gradually transformed into a Bavarian structure.
  • the conversion is deliberately interrupted by rapid cooling, so compared to a complete conversion sets a defined retained austenite content of at least 8% and at most 20%.
  • a generally designated by the reference numeral 1 wheel bearing is shown in principle known geometry.
  • reference numeral 1 wheel bearing With regard to the construction and the function of the wheel bearing 1, reference is made to the above-cited prior art.
  • the wheel bearing 1 has a wheel hub 2, two rows of rolling elements 3, namely balls, and an outer ring 4.
  • the geometric axis of the wheel bearing 1 is denoted by A. While a number of rolling elements 3 rolls directly on the wheel hub 2, the second row of rolling elements 3 rolls on a separate inner ring 5, more generally referred to as a bearing ring from.
  • the inner ring 5 is the rolling bearing part subjected to a heat treatment according to FIG. 1.
  • a Wälznietbund 6 is located on the front side, in welhern a spur gear 7 is formed. By Wälznietbund 6 thus the inner ring 5 is fixed to the hub 2.
  • the Wälznietbund 6 including the spur gear 7 is formed without cutting from a Niethals, which was part of the wheel hub 2 prior to the forming.
  • the Wälznietvorgang fixes the inner ring 5 on the hub 2 and on the other hand forms the spur gearing 7, the inner ring 5 undergoes a widening, but thanks to the heat treatment described above only low, easily bearable tensions in the near-surface region of the inner ring fifth leads.

Landscapes

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

Abstract

L'invention concerne un élément de palier à roulement (5) constitué d'acier et présentant une structure bainitique et une teneur résiduelle en austénite comprise entre 8 et 20 %. Les contraintes de compression internes s'établissent à au moins 100 MPa jusqu'à une profondeur d'au moins 100 µm sous la surface, et la dureté de surface s'élève à au moins 59 HRC. L'élément de palier de roulement (5) est soumis à un traitement thermique avec transformation interrompue, et est en particulier réalisé sous la forme d'une bague de roulement d'un roulement de roue à denture frontale.
PCT/EP2013/056642 2012-05-16 2013-03-28 Élément de palier à roulement et procédé de traitement thermique d'un élément de palier à roulement WO2013170995A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012208169.0 2012-05-16
DE102012208169A DE102012208169A1 (de) 2012-05-16 2012-05-16 Wälzlagerteil sowie Verfahren zur Wärmebehandlung eines Wälzlagerteils

Publications (1)

Publication Number Publication Date
WO2013170995A1 true WO2013170995A1 (fr) 2013-11-21

Family

ID=48050691

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2013/056642 WO2013170995A1 (fr) 2012-05-16 2013-03-28 Élément de palier à roulement et procédé de traitement thermique d'un élément de palier à roulement

Country Status (2)

Country Link
DE (1) DE102012208169A1 (fr)
WO (1) WO2013170995A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107746932A (zh) * 2017-12-06 2018-03-02 东北大学 一种GCr15轴承钢的制备方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016202935A1 (de) 2016-02-25 2017-08-31 Schaeffler Technologies AG & Co. KG Reibungsarmes Kegelrollenlager
DE102017117483A1 (de) * 2017-08-02 2019-02-07 Schaeffler Technologies AG & Co. KG Verfahren zur Herstellung einer Wälzlagerkomponente aus Stahl

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6203634B1 (en) * 1998-10-28 2001-03-20 Skf Gmbh Method for heat-treating steel or cast iron components
DE10161721A1 (de) * 2001-12-15 2003-06-18 Kugelfischer G Schaefer & Co Wälzlagerkomponenten mit verschleißfester Oberfläche
DE102005009938A1 (de) 2005-03-04 2006-09-07 Schaeffler Kg Stirnverzahnung für eine antreibbare Radnabe
DE102005016427A1 (de) 2005-04-08 2006-10-12 Schaeffler Kg Bund mit stirnseitigen Zähnen für eine antreibbare Radnabe
DE102005018126A1 (de) 2005-04-20 2006-10-26 Schaeffler Kg Radlagergelenkeinheit
DE102006030478A1 (de) 2006-07-01 2008-01-03 Schaeffler Kg Lageranordnung einer über ein Drehgelenk antreibbaren Radnabe eines Kraftfahrzeuges
DE102006055028A1 (de) * 2006-11-22 2008-05-29 Schaeffler Kg Radialwälzlager, insbesondere zur Lagerung von Wellen in Windkraftgetrieben
DE102007044950B3 (de) 2007-09-20 2009-01-29 Ab Skf Für eine Wälzbeanspruchung ausgebildetes Werkstück aus durchhärtendem Stahl und Verfahren zur Wärmebehandlung
EP1774187B1 (fr) 2004-08-04 2010-02-24 Schaeffler KG Organe de machine pour charge de roulement
US20100296764A1 (en) * 2007-10-04 2010-11-25 Ingemar Strandell Rolling Element or Ring Formed From a Bearing Steel

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6203634B1 (en) * 1998-10-28 2001-03-20 Skf Gmbh Method for heat-treating steel or cast iron components
DE10161721A1 (de) * 2001-12-15 2003-06-18 Kugelfischer G Schaefer & Co Wälzlagerkomponenten mit verschleißfester Oberfläche
EP1774187B1 (fr) 2004-08-04 2010-02-24 Schaeffler KG Organe de machine pour charge de roulement
DE102005009938A1 (de) 2005-03-04 2006-09-07 Schaeffler Kg Stirnverzahnung für eine antreibbare Radnabe
DE102005016427A1 (de) 2005-04-08 2006-10-12 Schaeffler Kg Bund mit stirnseitigen Zähnen für eine antreibbare Radnabe
DE102005018126A1 (de) 2005-04-20 2006-10-26 Schaeffler Kg Radlagergelenkeinheit
DE102006030478A1 (de) 2006-07-01 2008-01-03 Schaeffler Kg Lageranordnung einer über ein Drehgelenk antreibbaren Radnabe eines Kraftfahrzeuges
DE102006055028A1 (de) * 2006-11-22 2008-05-29 Schaeffler Kg Radialwälzlager, insbesondere zur Lagerung von Wellen in Windkraftgetrieben
DE102007044950B3 (de) 2007-09-20 2009-01-29 Ab Skf Für eine Wälzbeanspruchung ausgebildetes Werkstück aus durchhärtendem Stahl und Verfahren zur Wärmebehandlung
US20100296764A1 (en) * 2007-10-04 2010-11-25 Ingemar Strandell Rolling Element or Ring Formed From a Bearing Steel

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
LUZGINOVA ET AL: "Evolution and thermal stability of retained austenite in SAE 52100 bainitic steel", MATERIALS SCIENCE AND ENGINEERING A: STRUCTURAL MATERIALS:PROPERTIES, MICROSTRUCTURE & PROCESSING, LAUSANNE, CH, vol. 448, no. 1-2, 8 February 2007 (2007-02-08), pages 104 - 110, XP005879850, ISSN: 0921-5093, DOI: 10.1016/J.MSEA.2006.10.014 *
VETTERS H ET AL: "Microstructure and fatigue strength of the roller-bearing steel 100Cr6 (SAE 52100) after two-step bainitisation and combined bainitic-martensitic heat treatment", INTERNATIONAL JOURNAL OF MATERIALS RESEARCH, CARL HANSER VERLAG, MUNCHEN, DE, vol. 97, no. 10, 1 January 2006 (2006-01-01), pages 1432 - 1440, XP009112543, ISSN: 1862-5282 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107746932A (zh) * 2017-12-06 2018-03-02 东北大学 一种GCr15轴承钢的制备方法

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