Überrollungsinduzierte Eigenspannungen in Wälzelementen aus 100 Cr 6

Nowadays requirements for bearings in aircraft gas turbines are a high challenge for the material. Increased temperature, starved lubrication, high rotational speed with high hoop stresses, and tight shaft fit result in a complex loading condition. To bear and resist these requirements the new caburizing bearing steel M50NiL was developed. Material and part properties of M50NiL are presented and compared with other hightemperature bearing steels. Hints are given according to the correct design in case depth and core toughness for aerospace bearings. Particular attention is given to the role of residual stresses, especially in carburized bearing parts. Material properties and production parameters that affect the development of the desired compressive residual stresses at the near surface region are discussed.

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A New Approach to Determine the Effect of Nonmetallic Inclusions on Material Behavior in Rolling Contact

Böhmer

1993

Creative Use of Bearing Steels

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Nonmetallic inclusions have an important influence on rolling element bearing behavior. Though this has been well-known for a long time, consideration of nonmetallic inclusions is usually done on the base of empirical results. This paper shows a new approach to describe the influence of inclusions partly analytical on a mechanical base. The notch effect of inclusions due to their mechanical properties in difference to the steel matrix was calculated by finite element method (FEM). The results were used to discuss the material reaction on nonmetallic inclusions in stress fields related with Hertzian contacts. Additionally, residual stresses were considered, and the interaction of both inclusions and residual stresses in rolling contact fatigue is discussed.

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Überrollungsinduzierte Eigenspannungen in Wälzelementen aus 100 Cr 6

Cited by 4 publications

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Chapter 7 Rolling-Sliding Wear of Metals

Chapter 7 Rolling-Sliding Wear of Metals

Residual Stresses and Material Behavior of M50NiL and RBD

A New Approach to Determine the Effect of Nonmetallic Inclusions on Material Behavior in Rolling Contact

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