Patent ID: 6528171
Filing Date: 2003-03-04
Classification: C23C,Y10T

Abstract:
A tool in the form of a cutting insert for machining a metal workpiece consisting essentially of a base body composed of a material selected from the group which consists of hard metals, cermets, ceramics and steel, and a coating applied to said body and consisting of a single layer or multiple layers and where the single layer or a layer lying beneath the outermost layer is a molybdenum sulfide containing layer comprised of an alternating sequence of two mutually different but adjacent layers of which a first contains 50 to 100 mass % metallic molybdenum and has a thickness of 50 nm and a second contains a 20 to 100 mass % proportion of MoS2 and a thickness of 50 nm to 500 nm and which is in the form of essentially hexagonal crystals which at least are oriented plane parallel to a tool surface in major part.