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:
Apr. 02, 2013
Filed:
Aug. 20, 2010
Seunghwan Park, Mito, JP;
Satoshi Hirano, Hitachi, JP;
Shinya Imano, Hitachi, JP;
Jun Sato, Hitachi, JP;
Hiroyuki Kokawa, Sendai, JP;
Yutaka Sato, Sendai, JP;
Kiyohito Ishida, Sendai, JP;
Toshihiro Omori, Sendai, JP;
Seunghwan Park, Mito, JP;
Satoshi Hirano, Hitachi, JP;
Shinya Imano, Hitachi, JP;
Jun Sato, Hitachi, JP;
Hiroyuki Kokawa, Sendai, JP;
Yutaka Sato, Sendai, JP;
Kiyohito Ishida, Sendai, JP;
Toshihiro Omori, Sendai, JP;
Hitachi, Ltd., Tokyo, JP;
Tohoku University, Miyagi, JP;
Abstract
It is an object to provide a friction stir tool excellent in productivity, high temperature strength, and wear resistance at high temperatures. The friction stir tool is formed of a Co-based alloy comprising crystal grains containing a γ' precipitate phase dispersed and precipitated therein, and a crystal grain boundary region and a precipitate phase between adjacent crystal grains, in which the precipitate phase is at least one phase selected from a μ phase, a Laves phase and a carbide phase.