Oerlikon Trading Ag, Truebbach

Dennis T Quinto

Christian Wohlrab

Jürgen Ramm

A method for manufacturing a cutting tool includes the steps of providing a body of cermet or cemented carbide, having a cutting edge with an edge radius Rsmaller than 40 &#x3bc;m, a flank a rake face, applying by PVD a single or a multilayer coating to at least a part of the surface of the body, comprising at least a part of the cutting edge and applying by PVD said single or multilayer coating, comprising PVD coating with at least one oxidic layer.

Cutting tool

The invention provides a single or a multilayer PVD coated sharp edged cutting tool, which can at the same time exhibit satisfactory wear and thermochemical resistance as well as resistance to edge chipping. The cutting tool comprises a sintered body made of a cemented carbide, a CBN, a cermet or a ceramic material having a cutting edge with an edge radius R, a flank and a rake face and a multilayer coating consisting of a PVD coating comprising at least one oxidic PVD layer covering at least parts of the surface of the sintered body. In one embodiment the edge radius Ris smaller than 40 &#x3bc;m, preferably smaller than or equal to 30 &#x3bc;m. The covered parts of the surface preferably comprise at least some parts of the sharp edge of the sintered body.

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North Tonawanda, NY, United States of America

Dennis T Quinto