CVD Coating Technologies for Inserts

Abstract

In recent years, there has been a growing trend for shorter machining time and a shift to dry cutting without the use of cutting fluids. These are expected to reduce power consumption from the standpoint of reducing environmental impact, as well as improve productivity through more efficient machining conditions. These factors cause the cutting edge to a rise in temperature during cutting, and because inserts are used in harsh environments, higher performance is required than in the past. In response to this trend, various technologies have been developed for inserts. Coated cemented carbide inserts have well-balanced wear resistance and chipping resistance compared with uncoated inserts made of other materials. Ceramic coatings applied to inserts include chemical vapor deposition (CVD) coating and physical vapor deposition (PVD) coating. This paper reports on CVD coating technologies.