Kappa - and gamma - a1203 - multiple coating, produced by chemical vapor deposition at low temperatures.

摘要

A coated body having a multi-layer of &kgr;-Al₂O₃ and or &ggr;-Al₂O₃ or TiN applied by MTCVD (Medium Temperature Chemical Vapor Deposition) is disclosed. The multi-layers can be interspersed with layers of Ti(C,N) which can also be applied by MTCVD. The body which is coated is preferably a cemented carbide, cermet, ceramic and/or high speed steel and may be used as a metal cutting insert.