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:
Sep. 06, 2011
Filed:
Oct. 24, 2005
Yoshio Okada, Itami, JP;
Naoya Omori, Itami, JP;
Minoru Itoh, Itami, JP;
Norihiro Takanashi, Itami, JP;
Shinya Imamura, Itami, JP;
Susumu Okuno, Itami, JP;
Yoshio Okada, Itami, JP;
Naoya Omori, Itami, JP;
Minoru Itoh, Itami, JP;
Norihiro Takanashi, Itami, JP;
Shinya Imamura, Itami, JP;
Susumu Okuno, Itami, JP;
Sumitomo Electric Hardmetal Corp., Hyogo, JP;
Abstract
The present invention relates to a surface-coated cutting tool comprising a substrate and a coating formed on the substrate, the coating includes a first coating of TiCN and a second coating of α-type AlO, the first coating is located between the substrate and the aforementioned second coating, and the second coating has compressive stress Sin an area Aspreading from an insert ridge portion in the direction of a rake face and the direction of a flank face with distances of at least 0.5 mm respectively and has tensile stress Sin an area Aother than this area A, while compressive stress Sand tensile stress Sare defined by the following expression (I):400 MPa≦|1−2|≦3500 Mpa   (I).