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:
Nov. 09, 2021
Filed:
Jul. 05, 2019
Sumitomo Electric Hardmetal Corp., Itami, JP;
Susumu Okuno, Itami, JP;
Shinya Imamura, Itami, JP;
Satoshi Ono, Itami, JP;
Anongsack Paseuth, Itami, JP;
SUMITOMO ELECTRIC HARDMETAL CORP., Itami, JP;
Abstract
A cutting tool includes: a substrate including a rake face; and a coating film that coats the rake face, wherein the coating film includes an α-AlOlayer disposed on the substrate, the α-AlOlayer includes crystal grains of α-AlO, an area ratio of crystal grains oriented in (001) among the crystal grains is 50% to 90% in the α-AlOlayer at the rake face, and a film residual stress Adetermined based on a crystal plane interval of a (001) plane of the α-AlOlayer at the rake face is more than 0 MPa and less than or equal to 2000 MPa, and a film residual stress Bdetermined based on a crystal plane interval of a (110) plane of the α-AlOlayer at the rake face is more than or equal to −1000 MPa and less than 0 MPa.