LAUSR

Influence of an initial mechanical treatment (grinding, polishing) on geometry and physical–mechanical parameters of a commercially pure titanium (Grade 2) surface after thermodiffusive saturation by nitrogen was studied. Microstructure analysis has shown that mechanism of formation and growth of a nitride film depends on the initial mechanical treatment. Nitriding under temperature of 750 °C does not influence practically the quality of ground surfaces and decreases it on one class for polished one. For higher saturation temperatures, surface quality has little dependence from the initial treatment. The best set of geometry and physical–mechanical characteristics belongs to the surface, which was initially polished and nitrided subsequently under 750 °C temperature, which provides its high wear resistance.