US20140144558A1 - Bearing component and method for surface hardening - Google Patents

Bearing component and method for surface hardening Download PDF

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Publication number
US20140144558A1
US20140144558A1 US13/808,071 US201113808071A US2014144558A1 US 20140144558 A1 US20140144558 A1 US 20140144558A1 US 201113808071 A US201113808071 A US 201113808071A US 2014144558 A1 US2014144558 A1 US 2014144558A1
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US
United States
Prior art keywords
hardness
bearing component
region
bearing
core
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.)
Abandoned
Application number
US13/808,071
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English (en)
Inventor
Marco Burtchen
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SKF AB
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Assigned to AKTIEBOLAGET SKF reassignment AKTIEBOLAGET SKF ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BURTCHEN, MARCO
Publication of US20140144558A1 publication Critical patent/US20140144558A1/en
Abandoned legal-status Critical Current

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    • 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
    • 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
    • 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
    • C21D1/34—Methods of heating
    • C21D1/42—Induction heating
    • 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
    • C21D2221/00—Treating localised areas of an article
    • C21D2221/10—Differential treatment of inner with respect to outer regions, e.g. core and periphery, respectively
    • 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

  • bearing components are through-hardened or carburized in order to meet technical requirements for different applications. Bearing components may namely be subjected to high contact stresses and wear when in use and thus require high hardness.
  • Induction hardening is a heat treatment in which a metal component is heated to the ferrite/austenite transformation temperature or higher by induction heating and then quenched. The quenched metal undergoes a martensitic transformation, increasing the hardness and brittleness of the surface of metal component. Induction hardening may be used to selectively harden areas of a bearing component without affecting the properties of the component as a whole.
  • U.S. Pat. No. 4,949,758 discloses a process for hardening the interior surface of a long (8-32 feet i.e. 244-975 cm), thin-walled (wall thickness 1 ⁇ 8 to 1 ⁇ 4 inch, i.e. 3-6 mm), small inside diameter (11 ⁇ 4 to 31 ⁇ 4 inch, i.e. 32 to 83 mm) tubular member. More particularly, it relates to a process involving progressive heating with an internally positioned, electromagnetic induction coil, followed by immediate quenching with a quench ring assembly, to develop a martensitic case on the inner surface of the tube. This method is used to obtain a surface having a hardness of at least 58 HRC and a substantially non-hardened core with a sharp demarcation between the hardened surface and the non-hardened case core.
  • the contact surface may constitute any of a raceway, a sliding surface, or at least a part of a guide flange or similar.
  • the bearing component may be an inner ring.
  • the bearing component may be an outer ring.
  • the bearing component may be a rolling element, for instance a roller or a ball.
  • the roller may be spherical, cylindrical, tapered, conical, or toroidal.
  • the hardness of the bearing component in the second region determined along the line decreases by less than 50 HRC per mm.
  • k is 1. According to another embodiment of the invention k is 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, or 1.9.
  • the induction coil is removed from the bearing component, and a quenching device, such as a quench spray or ring, is used to immediately quench the at least one part of the surface that has been heat treated.
  • a quenching device such as a quench spray or ring
  • the roller may comprise a hole or a bore.
  • the hole or the bore may be hardened.
  • the bearing component may for example be at least part of a roller, plain bearing, bushing, journal bearing, sleeve bearing, slewing bearing or a rolling element bearing, such as a ball bearing or roller bearing.
  • the rolling bearing may be any one of a cylindrical roller bearing, a spherical roller bearing, a toroidal roller bearing, a taper roller bearing, a conical roller bearing, or a needle roller bearing.
  • An electromagnetic induction coil 14 is used to harden at least one part of the exterior 10 a , 10 b of the roller 10 .
  • a source of high frequency electricity (about 1 kHz to 400 kHz) is used to drive a large alternating current through the induction coil 14 .
  • the relationship between operating frequency and current penetration depth and therefore hardness depth is inversely proportional, i.e. the lower the frequency the greater the hardness depth.
  • the method according to the present invention results in the formation of a transition zone visible in both hardness and in microstructure.
  • the heat treated part 18 of the exterior surface material 10 a , 10 b may namely have a hardness within the range of 55-75 HRC on the Rockwell, preferably 59-63 HRC.
  • the volume of material of increased hardness 18 may for example extend to a depth of up to 6 mm.
  • Such a roller 10 may be used for any application in which a part of the exterior surface 10 a , 10 b is subjected to increased wear, fatigue or tensile stress.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Articles (AREA)
  • Rolling Contact Bearings (AREA)
US13/808,071 2010-07-02 2011-05-27 Bearing component and method for surface hardening Abandoned US20140144558A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE1000717-7 2010-07-02
SE1000717 2010-07-02
PCT/SE2011/000095 WO2012002864A1 (en) 2010-07-02 2011-05-27 Bearing component and method for surface hardening

Publications (1)

Publication Number Publication Date
US20140144558A1 true US20140144558A1 (en) 2014-05-29

Family

ID=45402345

Family Applications (1)

Application Number Title Priority Date Filing Date
US13/808,071 Abandoned US20140144558A1 (en) 2010-07-02 2011-05-27 Bearing component and method for surface hardening

Country Status (5)

Country Link
US (1) US20140144558A1 (zh)
EP (1) EP2598663A1 (zh)
JP (1) JP2013535623A (zh)
CN (1) CN103080344A (zh)
WO (1) WO2012002864A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20230119200A1 (en) * 2020-04-03 2023-04-20 Aktiebolaget Skf Bearing unit with concentric clamping collar

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2955183A1 (en) * 2014-07-16 2016-01-21 Nsk Americas, Inc. Surface treated bearing component
JP6759114B2 (ja) * 2017-01-16 2020-09-23 住友重機械工業株式会社 減速装置及びワークの加工方法
JP6982337B2 (ja) * 2017-06-03 2021-12-17 ラジャブジブハイ サラデュバ、アツルクマール カーボンスラストベアリング用セグメントの製造方法
US20200199704A1 (en) * 2018-12-19 2020-06-25 GM Global Technology Operations LLC Method for heat treating with a gradual temperature profile

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050257860A1 (en) * 2004-05-24 2005-11-24 Takemori Takayama Rolling member and producing method thereof
WO2009045147A1 (en) * 2007-10-04 2009-04-09 Aktiebolaget Skf Rolling element or ring formed from a bearing steel
US20090301608A1 (en) * 2005-04-28 2009-12-10 Aisin Aw Co., Ltd. Carburized and induction-hardened component

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4949758A (en) * 1985-07-17 1990-08-21 Quinn's Oilfield Supply Ltd. Thin-walled small-bore steel tube with case hardened internal surface
SE509205C2 (sv) * 1996-05-21 1998-12-14 Ovako Steel Ab Förfarande för tillverkning av en stålkomponent med hård yta och seg kärna
JP2006328465A (ja) * 2005-05-25 2006-12-07 Nsk Ltd 転がり軸受用軌道輪の製造方法、転がり軸受用軌道輪、転がり軸受
CN1869255A (zh) * 2006-05-11 2006-11-29 镇江中船设备有限公司 双凹弧凸轮轴淬火工艺
JP2008266667A (ja) * 2007-04-16 2008-11-06 Nsk Ltd 車輪支持用転がり軸受装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050257860A1 (en) * 2004-05-24 2005-11-24 Takemori Takayama Rolling member and producing method thereof
US20090301608A1 (en) * 2005-04-28 2009-12-10 Aisin Aw Co., Ltd. Carburized and induction-hardened component
WO2009045147A1 (en) * 2007-10-04 2009-04-09 Aktiebolaget Skf Rolling element or ring formed from a bearing steel

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20230119200A1 (en) * 2020-04-03 2023-04-20 Aktiebolaget Skf Bearing unit with concentric clamping collar

Also Published As

Publication number Publication date
EP2598663A1 (en) 2013-06-05
WO2012002864A1 (en) 2012-01-05
CN103080344A (zh) 2013-05-01
JP2013535623A (ja) 2013-09-12

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AS Assignment

Owner name: AKTIEBOLAGET SKF, SWEDEN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:BURTCHEN, MARCO;REEL/FRAME:030055/0363

Effective date: 20130212

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION