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1. (WO2018086658) METHOD FOR PRODUCING A ROLLING BEARING RING HAVING AN IMPROVED ROBUSTNESS AGAINST THE FORMATION OF WHITE ETCHING CRACKS (WEC)

Pub. No.:    WO/2018/086658    International Application No.:    PCT/DE2017/100943
Publication Date: Fri May 18 01:59:59 CEST 2018 International Filing Date: Wed Nov 08 00:59:59 CET 2017
IPC: C21D 9/40
C21D 1/10
C22C 38/02
C22C 38/04
C22C 38/06
C22C 38/08
C22C 38/12
C22C 38/16
C22C 38/18
C22C 38/20
C22C 38/22
C22C 38/40
C22C 38/42
C22C 38/44
Applicants: SCHAEFFLER TECHNOLOGIES AG & CO. KG
Inventors: HOFMANN, Lothar
MANGOLD, Andreas
BLASS, Toni
KRUHÖFFER, Wolfram
TROJAHN, Werner
Title: METHOD FOR PRODUCING A ROLLING BEARING RING HAVING AN IMPROVED ROBUSTNESS AGAINST THE FORMATION OF WHITE ETCHING CRACKS (WEC)
Abstract:
The invention relates to a method for producing a rolling bearing ring having an improved robustness against the formation of white etching cracks (WEC), wherein the rolling bearing component, which is made of a sub-eutectoid, heat-treated steel containing 0.4 - 0.55 % of C and 0.5 - 2.0 % of Cr is inductively heated for forming a hardened boundary layer, then quenched and subsequently tempered.