Cavitation-erosion resistance of arc ion-plated (Ti,Cr)N coatings

The cavitation-erosion behavior of (Ti,Cr)N multi-component coatings produc ed by arc ion-plating on grey cast iron was studied by using an ultrasonic cavitation-erosion testing apparatus and scanning electron microscopy. The test results indicated that surface roughness of the substrate, surface mor phology of the coating, substrate bias voltage and the thickness of the coa ting had certain influence on the erosion rate. Arc ion-plated (Ti,Cr)N mul ti-component coatings showed better cavitation-erosion resistance than sing le component coatings because of higher microhardness and good adhesion.