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:
Sep. 13, 2016
Filed:
Mar. 05, 2013
Mitsubishi Materials Corporation, Tokyo, JP;
Kazuaki Senbokuya, Naka-gun, JP;
Yusuke Tanaka, Tokyo, JP;
MITSUBISHI MATERIALS CORPORATION, Tokyo, JP;
Abstract
A surface-coated cutting tool with a body and hard coating layer is provided. (a) The hard coating layer is made of a complex nitride layer of Al and Cr. (b) The hard coating layer deposited on a region from a cutting edge to a location 100 μm from the cutting edge toward an opposite side thereof has a granular crystal structure. The average grain size of granular crystals on a surface of the hard coating layer on the region is 0.2-0.5 μm. The average grain size of granular crystals at an interface between the cutting tool body and the hard coating layer on the region is smaller than the average grain size on the surface the hard coating layer in an extent of 0.02-0.1 μm. The crystal grain size length ratio of crystal grains whose size is 0.15-20% or less.