Examination the influence of orientation coated surface on adherence and nano hardness of coating PACVD TiN on tool steel for hot work

U radu su ispitana svojstva prevlake TiN nanešene PACVD postupkom (plazmom potpomognuto kemijsko taloženje iz parne faze) na alatni čelik za topli rad X38CrMoV5–3. Analiziran je utjecaj položaja i orijentacije uzorka na adhezivnost, faktor trenja i nanotvrdoću prevlake TiN. Prionjivost i faktor trenja prevlake TiN je ispitani su metodom brazdanja, dok je nanotvrdoća ispitana metodom Vickers. Iz rezultata ispitivanja utvrđeno je da orijentacija prevlačene površine u odnosu na smjer nastrujavanja reaktivnih plinova značajno ne utječe na kvalitetu prionjivosti, nanotvrdoću i faktor trenja prevlake. Međutim, na navedena svojstva potvrđen je značajan utjecaj udaljenosti ispitnog mjesta od donje površine uzorka kojom se oslanja na katodu PACVD uređaja. Utvrđeno je da se najbolja prionjivost TiN prevlake postiže na udaljenosti 30 mm od donje površine uzorka.This thesis examined the properties of TiN coatings deposited onto hot work tool steel X38CrMoV5-3 using PACVD (Plasma Assisted Chemical Vapor Deposition). The influence of the position and orientation of the sample on the adhesion, friction factor and nano-hardness of the TiN coating was examined. The adhesion and friction factor of the TiN coating was tested using the scratch test, while nano-harness has been tested using the Vickers method. From the results it was concluded that the orientation of the coated surface relative to the drift direction of the reactive gas does not significantly affect adhesion strength, friction factor or nano-hardness of the coating. However, the influence of distance of the test sample from the lower surface which rests on the cathode of the PACVD device on the above mentioned properties has been confirmed. It was determined that the best adhesion of the TiN coating is achieved at a distance of 30 mm from the bottom surface of the sample