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:
Feb. 23, 2021
Filed:
Aug. 25, 2016
Mitsubishi Materials Corporation, Tokyo, JP;
Shun Sato, Naka, JP;
Masakuni Takahashi, Naka, JP;
MITSUBISHI MATERIALS CORPORATION, Tokyo, JP;
Abstract
Provided is a surface-coated cutting tool including: a tool body () and a hard coating layer on the tool body (). The hard coating layer has an alternate laminate structure of A () and B layers (). The A layer () is a Ti and Al complex nitride layer satisfying a compositional formula: (TiAl)N, 0.4≤z≤0.7. The B layer () is a Cr, Al and M complex nitride layer satisfying a compositional formula: (CrAlM)N, 0.03≤x≤0.4 and 0≤y≤0.05. The value of a ratio tB/tA of the average layer thickness of the B layer () to the average layer thickness of the A layer () satisfies 0.67 to 2.0. The lattice constant a(Å) of crystal grains of the hard coating layer satisfies 4.10≤a≤4.20. The ratio of I(200) to I(111) satisfies 2.0≤I(200)/I(111)≤10.