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Low friction W-C:H coatings for wear resistance in roller bearings

Published online by Cambridge University Press:  17 March 2011

Thorsten Kacsich ,
Peter Werner Gold  and
Jörg Loos
Thorsten Kacsich
Affiliation:
Metaplas Ionon GmbH, Bergisch Gladbach, Germany
Peter Werner Gold
Affiliation:
Institute for Machine Elements and Machine Design, RWTH Aachen, Germany
Jörg Loos
Affiliation:
Institute for Machine Elements and Machine Design, RWTH Aachen, Germany
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Abstract

Life time limiting effects in roller bearings and gear wheel applications are wear, sizing, and fatigue damages like micro pitting. These mechanisms are related to a number of parameters: lubrication conditions, surface roughness, and the hardness of the bulk material. Nowadays, Me-DLC coatings like MAXITÓ W-C:H offer surface protection under dry, mixed, and hydrodynamic conditions. This allows the increase of load capacities, respectively the decrease of gearing size. Moreover, a reduction of toxic lubrication additives can be achieved. The performance of the MAXITÓ W-C:H coatings in roller bearings was investigated on the FE8 test rig under mixed friction conditions. The W-C:H was deposited via the PVD technique of magnetron sputtering onto case hardened steel. The coating thickness was varied from 1.5 to 5 m m with respect to optimised wear resistance. The wear was drastically reduced by powers of ten as compared to uncoated roller bearings.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 697: Symposium P – Surface Engineering 2001--Fundamentals and Applications , January 2001 , P3.7
Copyright
Copyright © Materials Research Society 2002

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References

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