Ispitivanje premaza primjenjenih na diskove kočnica na dva uloška za disk-kočnicu

While braking, according to the severity of it, thermal, metallurgical, constructive and tribological occurrences emerge on the brake disc-pad interface. In this study, NiCr was sprayed as bonding layer onto the discs, one of which was coated with Al2O3-TiO2 by plasma spray and the other was coated with NiCr-Cr3C2 by High Velocity Oxygen Fuel (HVOF). In addition, the discs were tested with inertia dynamometer according to SAE’s J2522 testing procedure. The measurements showed that although the pads of the coated discs were exposed to higher braking temperatures, friction coefficient of the disc coated with NiCr- Cr3C2 was obtained 6 % higher compared to the original disc.Pri kočenju, zbog jačine, dolazi do termalnih, metalurških, konstruktivnih i triboloških pojava na sučelju uloška za disk kočnice. U ovoj analizi, na diskove je poprskan NiCr kao vezni sloj, od kojih je jedan disk premazan plazma sprejem Al2O3-TiO2, a drugi je premazan s NiCr- Cr3C2 pod visokim kisikovim tlakom (VKT). Osim toga, diskovi su testirani dinamometrom inercije prema postupku testiranja SAE J2522. Mjerenja su pokazala da iako su ulošci premazanih diskova bili izloženi visokim temperaturama kočenja, dobiven je 6 % viši koeficijent trenja diska premazanog s NiCr-Cr3C2 u usporedbi s originalnim diskom