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:
Aug. 18, 2020
Filed:
Mar. 02, 2017
Mitsubishi Materials Corporation, Tokyo, JP;
Takuya Maekawa, Joso, JP;
Masakuni Takahashi, Anpachi-gun, JP;
Shun Sato, Anpachi-gun, JP;
Kenji Yumoto, Anpachi-gun, JP;
MITSUBISHI MATERIALS CORPORATION, Tokyo, JP;
Abstract
The present invention is directed to a surface-coated cubic boron nitride sintered material tool including a cBN substrate and a hard coating layer formed on a surface of the cBN substrate and having an alternate laminated structure of A layer and B layer. A peak of the grain size distribution of cBN grains in the cBN sintered material is present within a range of a grain size from 0.50 to 1.00 μm. The A layer has a composition of (TiAl)N (0.4≤x≤0.7 in an atomic ratio). The B layer has a composition of (CrAlM)N (0.03≤y≤0.6 and 0≤z≤0.05 in an atomic ratio). An X-ray diffraction peak of a (200) plane is present at a position of a diffraction angle of 43.6 plus or minus 0.1 degrees, and a plastic deformation work ratio of the B layer is 0.35 to 0.50.