Kennametal Inc.

Michael Frank Beblo

Zhigang Ban

Yixiong Liu

Volkmar Sottke

Hartmut Westphal

Aharon Inspektor

Mark J Rowe

Nicholas F Waggle, Jr

Mark S Greenfield

Peter Rudolf Leicht

Ronald Penich

Wangyang Ni

Ronald M Penich

In one aspect, coated cutting tools are described herein which, in some embodiments, can demonstrate improved wear resistance in one or more cutting applications. In some embodiments, a coated cutting tool described herein comprises a substrate and a coating adhered to the substrate, the coating comprising an inner layer deposited by physical vapor deposition and an outer deposited by physical vapor deposition over the inner layer.

Coating for improved wear resistance

A coated cutting insert for removing material from a workpiece that includes a substrate is disclosed. A wear-resistant coating on the substrate that includes an alumina layer and a Zr- or Hf-carbonitride outer layer deposited on the alumina layer. The Zr- or Hf-carbonitride outer layer is subjected to a post-coat wet blasting treatment. The wet blasting changes the stress condition of the exposed alumina coating layer from an initial tensile stress condition to a compressive stress condition.

Coated cutting insert and method for making the same

A coated cutting insert for removing material from a workpiece that includes a substrate is disclosed. A wear-resistant coating on the substrate that includes an &#x3b1;-alumina layer and a Zr&#x2014; or Hf&#x2014; carbonitride outer layer deposited on the &#x3b1;-alumina layer. The Zr&#x2014; or Hf&#x2014; carbonitride outer layer is subjected to a post-coat wet blasting treatment. The wet blasting changes the stress condition of the exposed alumina coating layer from an initial tensile stress condition to a compressive stress condition.

Hard coatings and methods of making the hard coatings comprising aluminum titanium nitride which are usable on cutting tools are disclosed. The coatings include at least one aluminum titanium nitride layer having between about 0 and about 15 weight percent hexagonal phase and a composition of (AlTi)N, where x is in the range of about 0.53 to about 0.58 moles.

Aluminum titanium nitride coating and method of making same

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Delmont, PA, United States of America

Michael Frank Beblo