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The implantation of nitrogen, carbon, and oxygen can be used for enhancing the
tribological properties of critical components for internal combustion engines. Hardox and Raex
steels have very similar strength parameters as for steel used for piston rings in internal
combustion engines. An essential criterion when selecting material for the production of piston
rings is a low friction factor and a low wear index. The aim of this study was to determine the
extent to which these parameters can be enhanced by nitrogen ion implantation. Samples were
implanted with nitrogen ions with 65 keV energy and the fluence of implanted ions set
to 1.1017 N+/cm2. Friction and wear measurements were performed on a pin-on disc stand. The
results demonstrate that implantation with nitrogen ions significantly reduces the friction factor
and wear of Hardox 450 and Raex 400 steels. Implantation can and should be used for enhancing
the tribological properties of steel used for friction elements in internal combustion engines,
particularly when heat treatment is excluded. Final elements can be subjected to implantation,
as the process does not change their dimensions.
