Sandvik Intellectual Property Ab

Åke Östlund

Jan Engqvist

Per Gustafson

Erik Lindahl

Björn Ljungberg

Per Lindskog

Jonny Edman

A coated cutting tool comprising substrate and a coating, wherein the coating comprises a layer of MTCVD TiCN, and a layer of &#x3b1;-AlO, wherein the &#x3b1;-AlOlayer exhibits an X-ray diffraction pattern, as measured using CuK&#x3b1; radiation, the (hkl) reflections used are (012), (104), (110), (113), (116), (300), (214) and (0 0 12), and the TC(0 0 12) is higher than 5 and a full width half maximum (FWHM) of a rocking curve peak of the (0 0 12) plane of the &#x3b1;-AlOis lower than 30&#xb0;.

Coated cutting tool

A coated turning insert particularly useful for turning in stainless steel is disclosed. The insert is characterized by a WC&#x2014;Co-based cemented carbide substrate having a highly W-alloyed Co-binder phase and a coating including an inner layer of TiCNOwith columnar grains followed by a layer of fine-grained, &#x3ba;-AlOand a top layer of TiN. The layers are deposited by using CVD methods.

Coated turning insert and method of making it

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Hagersten, Sweden

Åke Östlund