Sandvik Intellectual Property Ab

Jan Kjellgren

Peter Littecke

Gunilla Andersson

Katarina Dahl

Anders Karlsson

Henrik Nordlund

Anders Karlson

A CVD-coated cutting tool insert with improved toughness properties having the ability to withstand high temperatures without sacrificing edge line security is disclosed. The insert coating comprises a TiCN-layer with a low tensile stress level of 50-500 MPa and an &#x3b1;-AlO-layer with a high surface smoothness with a mean Ra&#x3c;0.12 &#x3bc;m as measured by AFM-technique, obtained by subjecting the coating to an intensive wet blasting operation.

Coated cutting tool insert

The present invention relates to a CVD-coated cutting tool insert with a TiCNlayer with a low tensile stress level of from about 50 to about 390 MPa and an &#x3b1;-AlOlayer with a high surface smoothness with a mean Ra is equal to or less than about 0.12 &#x3bc;m as measured by AFM-technique. This is obtained by subjecting the coating to an intensive wet blasting operation.

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Kista, Sweden

Jan Kjellgren