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:
May. 04, 2021
Filed:
May. 25, 2017
Sumitomo Electric Hardmetal Corp., Itami, JP;
Shinya Imamura, Sorachi-gun, JP;
Hideaki Kanaoka, Sorachi-gun, JP;
Anongsack Paseuth, Sorachi-gun, JP;
Satoshi Ono, Sorachi-gun, JP;
Kouhei Yoshimura, Sorachi-gun, JP;
Sumitomo Electric Hardmetal Corp., Itami, JP;
Abstract
A surface-coated cutting tool includes a base material and a coating formed on the base material. The base material is a cemented carbide or a cermet. A surface of the base material includes a rake face, a flank face, and a cutting edge face connecting the rake face to the flank face. The base material has an oxygen concentration of less than or equal to 1 at. % at a depth position of 0.4 μm from the cutting edge face. The coating includes a hard layer. A topmost layer in the hard layer has a compressive stress of more than or equal to 1.5 GPa in absolute value.