Patent ID: 7531213
Filing Date: 2009-05-12
Classification: C23C,Y10T

Abstract:
1. A method for making a coated cutting tool insert having an upper face, an opposite face and at least one clearance face intersecting said upper and opposite faces to define cutting edges comprising depositing by CVD, onto a cemented carbide, titanium based or ceramic substrate a first layer system, having a total thickness of from about 2 to about 50 μm, comprising at least one layer selected from titanium carbide, titanium nitride, titanium carbonitride, titanium carboxide and aluminum oxide, and an outer, from about 1 to about 15 μm thick, aluminum oxide layer or (Al a penultimate outermost layer of TiO an outermost, from about 0.3 to about 2 μm thick, TiC followed by a post-treatment removing at least said outermost layer on the cutting edge and on the upper face, wherein said post-treatment also removes the TiO