Modification of Surface Properties on Cemented Carbide Alloys Through Mirror Quality Finish Grinding

Abstract

In this study, efficient, highprecision grinding of cemented carbide alloys using a specific grinding wheel was performed, and the ground surface characteristics were investigated in detail. The results showed that final finishing using a chromiumbonded wheel produced an extremely smooth surface with an average roughness Ra of 4 nm. The grinding process produced a chromiumand copperrich surface layer, as well as a large amount of diffusion of oxygen. Adhesive strength tests using a microscratching method were also carried out on ground substrates coated with diamondlike carbon (DLC) films. The surface ground by the chromiumbonded wheel exhibited superior adhesive strength due to its strong chemical affinity with the DLC film.