The Effects of Coating Obtained by DC Reactive Magnetron Sputtering Technique on the Wear Performance of Engine Parts

In this study, TiAlN coating obtained by using the magnetron sputtering method was deposited on steel materials used in automotive engine parts. The characterization and wearing properties of the coatings were investigated. The distance between the target and the coating was kept constant during the operation. TiAlN coatings were deposited on base materials (AISI 4150) using selected parameters ( 0,-100V and-200V bias voltages and 0.3 mtorr, 0.6 mtorr, 1.2 mtorr pressures). Hardening and nitriding processes were applied to the base materials. The coating characteristics of hardened and hardened + nitrided samples, surface properties and wear behavior were compared. The best results for the coating characteristics were determined. It was found that the hardened + nitrided of AISI 4150 samples with high nitrogen pressure (1.2 mtorr) gave the best wear resistance which resulted in a decreased coefficient of friction and a reduction in wear rates