Abstract
This paper presents a study of the influence of nitrogen and titanium ion implantation on the friction coefficient, wear and microhardness of steel. N+ and Ti+ implantations were carried out at the chosen ion doses 1–6×1017ions/cm2 and the energy of 180keV. The tribological properties for implanted nitrogen steel have shown remarkable improvement since the friction coefficient decreased by about 40% and wear rate decreased by more than ten times at the dose 6×1017ions/cm2. Insignificant improvement was observed in wear after the Ti ion implantation. On the other hand, the hardness test for a low Cr alloyed steel implanted N+ showed a significant increase at the dose 6×1017N+/cm2 in comparison to our previous data using a high Cr alloyed steel implantation with Ti+ ions at the dose 1017 Ti+/cm2. Annealing the samples after implantation with nitrogen decreases their wear but increases the friction coefficient. Annealing of titanium implanted samples rather worsens their tribological properties.
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