EP 2024527 A2 20090218 - METHOD FOR HARDENING RUNNING SURFACES OF ROLLER BEARING COMPONENTS
Title (en)
METHOD FOR HARDENING RUNNING SURFACES OF ROLLER BEARING COMPONENTS
Title (de)
VERFAHREN ZUM HÄRTEN VON LAUFFLÄCHEN VON WÄLZLAGERKOMPONENTEN
Title (fr)
PROCÉDÉ PERMETTANT DE FAIRE DURCIR DES SURFACES DE ROULEMENT DE COMPOSANTS DE PALIER À ROULEMENT
Publication
Application
Priority
- DE 2007000932 W 20070523
- DE 102006025008 A 20060530
Abstract (en)
[origin: WO2007137557A2] The invention relates to a method for hardening running surfaces (3) of roller bearing components (2), in particular external bearing rings. In order to provide the edge area (functional layer) of the roller bearing components with a deep layer which is particularly hard and resistant to corrosion, the roller bearing component (2) undergoes nitration for a long period of time at a temperature of between 450 and 650 °C and for at least 25 hours. During said treatment no carburizing and/or subsequently hardening takes place.
IPC 8 full level
C23C 8/02 (2006.01); C23C 8/26 (2006.01); C23C 8/38 (2006.01)
CPC (source: EP US)
C22C 38/44 (2013.01 - EP US); C22C 38/46 (2013.01 - EP US); C22C 38/52 (2013.01 - EP US); C23C 8/02 (2013.01 - EP US); C23C 8/22 (2013.01 - EP US); C23C 8/26 (2013.01 - EP US); C23C 8/36 (2013.01 - EP US); C23C 8/38 (2013.01 - EP US); F16C 33/14 (2013.01 - EP US); F16C 33/64 (2013.01 - EP US); F16C 2220/70 (2013.01 - EP US); F16C 2223/02 (2013.01 - EP US); F16C 2223/06 (2013.01 - EP US); F16C 2223/12 (2013.01 - EP US); F16C 2223/14 (2013.01 - EP US); F16C 2223/16 (2013.01 - EP US); F16C 2240/18 (2013.01 - EP US); Y10T 29/49643 (2015.01 - EP US); Y10T 29/49689 (2015.01 - EP US); Y10T 29/49707 (2015.01 - EP US); Y10T 29/49709 (2015.01 - EP US)
Citation (search report)
See references of WO 2007137557A2
Citation (examination)
FR 2783840 A1 20000331 - AUBERT & DUVAL SA [FR]
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA HR MK RS
DOCDB simple family (publication)
DE 102006025008 A1 20071206; DE 102006025008 B4 20220915; EP 2024527 A2 20090218; US 2010058592 A1 20100311; US 8479396 B2 20130709; WO 2007137557 A2 20071206; WO 2007137557 A3 20081211
DOCDB simple family (application)
DE 102006025008 A 20060530; DE 2007000932 W 20070523; EP 07764340 A 20070523; US 30237007 A 20070523