Cutting Applications of DLC Film

Abstract

In this work, tribological behaviors and cutting performance of DLC coated cutting tools were investigated. Pin-on-disk experiments were conducted on DLC-coated cemented carbide disks, using an aluminum alloy ball as a pin material. DLC coatings had a low friction coefficient (μ∿0.1) against the aluminum alloys. The DLC-coated tools were evaluated for aluminum alloys machining. The results show that DLC-coated tools can be used to reduce adhesion between a tool and a workpiece. The reduction of adhesion occurred because of the low friction coefficient. Therefore, smooth surface of the workpiece was obtained. In order to analyze the cutting process, Finite Elements Method (FEM) simulation was used. The FEM simulation of a contact between the tool and the workpiece enabled to explain a phenomenon of the cutting process. In the case of dry machining of the aluminum alloys, DLC-coated tools have excellent potential compared to non-coated tools.