Rake and Flank Wear Mechanisms of Coated Cemented Carbides

Abstract

A series of commercially available cemented carbides coated with single or composite layers of TiC, TiN, and Al 2 O 3 were used to cut three types of steel, En 8 (080M40), En9 (070M55), and En24 (817M40). For comparison, two uncoated cemented carbides and some Al 2 O 3 -ceramic inserts were also tested. The worn surfaces were examined using optical and scanning electron microscopy techniques and tool/work interfacial conditions were evaluated from ‘quick stop’ experiments and tool temperature estimates. By linking this information with observed wear rates, various rake and flank wear mechanisms are proposed.