Increasing the wear resistance of austenitic stainless steel X5CrNiMo17-12-2 by applying PACVD TiN coating

U teorijskom dijelu rada opisana su svojstva i primjena austenitnih nehrđajućih čelika i mogućnosti povišenja njihove otpornosti na trošenje primjenom postupaka inženjerstva površina. Dan je pregled primjene postupaka navarivanja, prevlačenja elektroerozijom (postupak EDC) te prevlačenja iz parne faze postupcima PVD, CVD i PACVD. U eksperimentalnom dijelu rada provedeno je prevlačenje čelika X5CrNiMo17-12-2 prevlakom PACVD TiN na različitim temperaturama od 500 °C do 560 °C tijekom 6 h. Ispitana je hrapavost površine, debljina, prionljivost i otpornost TiN prevlake na mikroabraziju. Na temelju rezultata ispitivanja predloženi su optimalni parametri 520 ˚C / 6 h za nanošenje PACVD TiN prevlake na austenitni nehrđajući čelik X5CrNiMo17-12-2.Properties and applications of austenitic stainless steels, as well as the possibilities of enhancing their wear resistance through surface engineering techniques, are described in the theoretical part of the paper. An overview of processes such as welding, electrical discharge coating (EDC), PVD, CVD, and PACVD coating method is given in details. In the research section, PACVD TiN coating of X5CrNiMo17-12-2 steel was carried out at various temperatures ranging from 500 °C to 560 °C during 6 hours. Surface roughness, thickness, adhesion and the microabrasion resistance tests of the TiN coating were examined. Based on the test results, optimal parameters of 520 °C during 6 hours were suggested for applying PACVD TiN coating onto austenitic stainless steel X5CrNiMo17-12-2