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. 06, 2009
Filed:
Dec. 24, 2008
Kouhei Tomita, Naka, JP;
Michiyasu Nishiyama, Naka, JP;
Akira Osada, Naka, JP;
Eiji Nakamura, Naka, JP;
Kouhei Tomita, Naka, JP;
Michiyasu Nishiyama, Naka, JP;
Akira Osada, Naka, JP;
Eiji Nakamura, Naka, JP;
Mitsubishi Materials Corporation, Tokyo, JP;
Abstract
In a surface-coated cutting tool, (a) a Ti compound layer as a lower layer and (b) an α-type AlOlayer as an upper layer having a crystal grain structure of an even polygonal shape (including an even hexagonal shape) and an elongate shape and containing Zr are deposited on the surface of a tool substrate. In the surface-coated cutting tool, the above mentioned crystal grains of which insides are divided by at least one crystal lattice interface with the constituent atom covalent lattice point type expressed by Σ3 occupying 60% or more as an area ratio in the crystal grains of the upper layer.