Influence of MnS inclusion characteristics on generation of white etching cracks in 100Cr6 bearing steel

Publikationen: Beitrag in FachzeitschriftArtikelForschung(peer-reviewed)

Autoren

  • Lutz Morsdorf
  • Ivan Gonzalez
  • Michael Kölling
  • Christian Broß
  • Dirk Ponge
  • Michael Herbig
  • David Mayweg

Organisationseinheiten

Externe Organisationseinheiten

  • Max-Planck-Institut für Eisenforschung GmbH, Düsseldorf
  • Technische Hochschule Chalmers

Abstract

Wind turbine gearbox (WTGB) bearings suffer from premature failures through white etching cracks (WECs). To investigate causes of this failure mechanism, we tested two types of 100Cr6 bearing steel components. We carried out rolling contact fatigue experiments on standard washers and material extracted from a WTGB bearing. These differed strongly in morphology and orientation of non-metallic inclusions (NMIs) with respect to the raceway, especially of MnS-type. While the standard washer did not exhibit WECs formation, the WTGB bearing did - even under moderate conditions (1.9 GPa Hertzian pressure, 10 7 cycles). We therefore conclude that MnS-inclusions are a key factor in initiation of WECs in WTGB bearings.

Details

OriginalspracheEnglisch
Aufsatznummer205129
Seitenumfang16
FachzeitschriftWear
Jahrgang534-535.2023
Ausgabenummer15 December
Frühes Online-Datum22 Sept. 2023
DOIs
StatusVeröffentlicht - 15 Dez. 2023