An overview of DLC coatings on cutting tools performance

This paper presents the state-of-the-art and requirements for manufacturing applications of DLC coatings. DCL (diamond-like carbon or amorphous carbon) thin films on cutting tools bring considerable benefits during chip removal processes. Experimental studies on DLC coated tools used during different cutting operations on different workpiece materials showed that, in most cases, DLC films increased tool life, facilitated chip evacuation and allowed dry machining. Unfortunately, limited adhesion of films on tool surface prevents extending the use of DLC coated tools for hard materials or for discontinuous machining. Nowadays, the major challenges for specialists are to develop new depositing techniques for DLC films and to find the most appropriate machining conditions.