Patent ID: 7960016
Filing Date: 2011-06-14
Classification: C23C,Y10T

Abstract:
1. A workpiece having a surface whereas at least parts of said surface are coated with a wear resistant multilayered hard coating deposited by a PVD process, whereas the hard coating comprises at least a first supporting layer and a second layer, whereas the first layer is interposed between the workpiece and the second layer, whereas the first layer comprises a coating material of the following composition whereas 0.4<a<0.6, and 0≦x and y<0.3, whereas 0.5<b<0.7, and 0≦x and y<0.3; the second layer comprises a coating material of the following composition whereas M stands for at least one element of the transition metals of group 4, 5, 6 of the periodic system except Chromium and the second layer comprises two different crystalline phases.