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Ion Implantation into High-Speed Steel for Improved Tribology

Published online by Cambridge University Press:  22 February 2011

J-P. Hirvonen ,
D. Rück ,
S. Yan ,
R. Lappalainen  and
P. Torri
J-P. Hirvonen
Affiliation:
Technical Research Centre of Finland, Metallurgy Laboratory, FIN-02151 Espoo, Finland
D. Rück
Affiliation:
Gesellschaft für Schwerionenforschung mbH, D-6100 Darmstadt, Germany
S. Yan
Affiliation:
Gesellschaft für Schwerionenforschung mbH, D-6100 Darmstadt, Germany
R. Lappalainen
Affiliation:
Department of Physics, FIN-00014 University of Helsinki, Finland
P. Torri
Affiliation:
Department of Physics, FIN-00014 University of Helsinki, Finland
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Abstract

Ion implantation into steels with a martensitic microstracture is reviewed and discussed in terms of different implanted species and observed changes in the structure. Both single ion and dual ion implantation treatment are included. The disability of the nitrogen ion implantation to improve the tribological characteristics of steels with a martensitic microstructure can be overcome by dual implantation of titanium and carbon, for example. Results of tribological tests on samples in which titanium is replaced by chromium are more controversial, although changes in the sliding characteristics were observed. Dry sliding on the samples implanted up to 1018 ions/cm2 is totally different by nature and -based on the reported results- associated with the formation of carbon precipitates on the surface. The thermal stability of implanted nitrogen and carbon in MЗ high-speed steel was examined and nitrogen was shown to be less stable than carbon. Mechanical and tribological properties were further changed by heat treatment after ion implantation, which indicates that temperature is also a critical parameter during ion implantation.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 316: Symposium A – Materials Synthesis and Processing Using Ion Beams , 1993 , 507
Copyright
Copyright © Materials Research Society 1994

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References

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