Patent attributes
A hard coating layer system comprises at least a main layer (3) on a surface of a substrate (1), a buried layer (4) and an outer surface layer (5), wherein the surface layer (5) comprises AlCrZ, where Z stands for N, C, B, CN, BN, CBN, NO, CO, BO, CNO, BNO, or CBNO In such innovative coating triplex system and corresponding coated tools and components the buried comprises any one of the following materials or their combinations: a metal nitride, carbide or carbonitride a metal silicon nitride, carbide, or carbonitride, wherein the metal is at least one transition metal of the IVB, VB or VIB group or a multilayer of the materials or a material or a combination or a multilayer of the materials comprising at least one metal or carbon, preferably a diamond like carbon layer. The main layer comprises a nitride, carbide or carbonitride or a multilayer of nitride, carbide or carbonitride material. The main layer can be deposited on the workpiece either directly or via an interjecting adhesion layer, which can be an aforementioned transition metal or metal nitride, preferably AlCr, AlTi, Cr, Ti, AlCrN, AlTiN, TiN or CrN.
