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:
May. 14, 2019
Filed:
Jan. 29, 2015
Sandvik Intelectual Property Ab, Sandviken, SE;
Sakari Ruppi, Portimao, PT;
Hindrik Engstrom, Soderbarke, SE;
Jonas Lauridsen, Vasteras, SE;
Oscar Alm, Norberg, SE;
Peter Matsson, Krylbo, SE;
Tommy Larsson, Angelsberg, SE;
Erik Lindahl, Uppsala, SE;
Jan Engqvist, Uppsala, SE;
Dirk Stiens, Tubingen, DE;
SANDVIK INTELLECTUAL PROPERTY AB, Sandviken, SE;
Abstract
A coated cutting tool insert includes a substrate of cemented carbide, cermet, ceramics, steel or cubic boron nitride having deposited thereon a coating having a total thickness of 60 μm, including one or more layers having a wear resistant layer of α-AlOof a thickness of 1 to 45 μm deposited by chemical vapour deposition (CVD). The α-AlOlayer includes at least two portions, a first thickness portion and a second thickness portion immediately on top of the first thickness portion. The first thickness portion has an essentially columnar α-AlOgrain structure, and at a transition from the first thickness portion to the second thickness portion the grain boundaries of at least 1 out of 25 neighboring grains of the α-AlOgrains undergo a directional change into a direction that is essentially perpendicular, 90±45 degrees, to the grain boundaries in the first thickness portion.