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:
Jun. 15, 2021
Filed:
Jun. 26, 2019
Applicant:
Sumitomo Electric Hardmetal Corp., Itami, JP;
Inventors:
Assignee:
SUMITOMO ELECTRIC HARDMETAL CORP., Itami, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23B 27/14 (2006.01);
U.S. Cl.
CPC ...
B23B 27/148 (2013.01); B23B 2222/04 (2013.01); B23B 2228/10 (2013.01);
Abstract
A cutting tool includes a substrate and a coating that coats a surface of the substrate, the coating including a multilayer structure layer composed of at least one layer A and at least one layer B alternately deposited from a side closer to the substrate toward a side closer to a surface, the layer A having an average composition of AlCrN, the layer B being composed of AlTiN, the layer A being composed of a domain region and a matrix region, the domain region having a composition ratio of Cr larger than that of Cr of the matrix region, wherein x has a range of 0.5≤x≤0.8 and y has a range of 0.5≤y≤0.7.