Patent ID: 9028960
Filing Date: 2015-05-12
Classification: C09D,C23C,Y10T

Abstract:
1. A wear resistant PVD coating for chip forming metal machining cutting tools, comprising: one or more D double layers, where each D double layer consists of one B layer and one A layer, the A layer being deposited onto the B layer without intermediate layers, and where A and B have essentially the same chemical composition but differ from each other with respect to their average grain widths, w wherein within each D double layer, the A layer is fine grained with 2<w a thickness of each A layer is between 0.03 and 5 μm and a thickness of each B layer is between 0.1 and 5 μm, whereby the total thickness of all D double layers is between 0.3 and 20 μm.