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:
Oct. 17, 2023
Filed:
Jan. 25, 2022
Sumitomo Electric Industries, Ltd., Osaka, JP;
Haruko Harada, Osaka, JP;
Satoshi Ono, Osaka, JP;
Anongsack Paseuth, Osaka, JP;
Katsumi Okamura, Osaka, JP;
SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka, JP;
Abstract
A cutting tool includes a substrate and a coating film, wherein the coating film has a first layer formed from a plurality of hard grains, the hard grains are made of TiSiCN having a cubic crystal structure, the hard grains have a lamellar structure in which a layer having a relatively high silicon concentration and a layer having a relatively low silicon concentration are alternately stacked, and a maximum value of percentage of number Aof silicon atoms to a sum of the number Aof silicon atoms and number Aof titanium atoms in a grain boundary region between the hard grains, {A/(A+A)}×100, is larger than an average value of percentage of number Bof silicon atoms to a sum of the number Bof silicon atoms and number Bof titanium atoms in the first layer, {B/(B+B)}×100.