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:
Jan. 21, 2025
Filed:
Jun. 22, 2023
Sumitomo Electric Hardmetal Corp., Itami, JP;
Sumitomo Electric Hardmetal Corp., Itami, JP;
Abstract
A cutting tool including a substrate and a coated film arranged on the substrate, in which the coated film includes a first layer positioned on the substrate, a second layer positioned on the first layer, and a third layer positioned on the second layer, the first layer is composed of titanium carbonitride, the second layer is composed of aluminum oxide, the third layer is composed of titanium carbonitride, a residual stress X of the first layer and a residual stress Y of the second layer satisfy a relationship of formula 1, and the residual stress Y of the second layer and a residual stress Z of the third layer satisfy a relationship of formula 2.