Patent ID: 7348074

Claim:
A hard multilayer coating for improving the wear resistance of workpieces, said multilayer coating comprising: at least one layer selected from the group consisting of: an (Al y Cr 1-y )X layer, wherein 0.2≦y≦0.7 and X is selected from the group consisting of N, C, B, CN, BN, CBN, NO, CO, BO, CNO, BNO, and CBNO, and a (Ti z Si 1-z ) layer, wherein 0.01≦z≦0.3, and at least one layer stack comprising the following layers: one (AlCrTiSi) X mixed layer followed by another (Ti z Si 1-z ) X layer followed by another (AlCrTiSi) X mixed layer followed by another (Al y Cr 1-y ) X layer, wherein X, y and z are as previously defined.