The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 19, 2016
Filed:
Sep. 17, 2012
Walter Ag, Tubingen, DE;
Walter AG, Tübingen, DE;
Abstract
Cutting insert made of hard metal, cermet or ceramic substrate body with multi-layer coating applied thereto by CVD methods. The coating has a total thickness of 5 to 40 μm and, starting from the substrate surface, has one or more hard material layers, an alpha aluminum oxide (α-AlO) layer of a layer thickness of 1 to 20 μm and optionally at least portion-wise over the α-AlOlayer one or more further hard material layers as decorative or wear recognition layers. The α-AlOlayer has a crystallographic preferential orientation characterized by a texture coefficient TC (0 0 12)≧5 for the (0 0 12) growth direction. The α-AlOlayer has an inherent stress in the region of 0 to +300 MPas, and the substrate within a region of 0 to 10 μm from the substrate surface has an inherent stress minimum in the region of −2000 to −400 MPas.