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:
Apr. 08, 2025
Filed:
May. 21, 2021
Sumitomo Electric Hardmetal Corp., Itami, JP;
Susumu Okuno, Itami, JP;
Takato Yamanishi, Itami, JP;
Masahito Hikiji, Itami, JP;
Fumiyoshi Kobayashi, Itami, JP;
SUMITOMO ELECTRIC HARDMETAL CORP., Itami, JP;
Abstract
A cutting tool comprises a substrate and a coating provided on the substrate, the coating including: a first alumina layer, a titanium compound layer, and a second alumina layer; in which a portion adjacent to the titanium compound layer in the first alumina layer serves as an interface region, a portion that is not the interface region in the first alumina layer serves as a non-interface region, a content of nitrogen in the interface region is 0.2 at % to 12 at %, and a content of nitrogen in the non-interface region is 0 at % to 0.15 at %; and the titanium compound layer includes a multilayer structure layer adjacent to the first alumina layer, the multilayer structure layer is composed of a first unit layer and a second unit layer, the first unit layer is made of titanium carbonitride, and the second unit layer is made of titanium carbonitroxide.