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. 28, 2021
Filed:
Aug. 04, 2017
Osaka University, Suita, JP;
Toshiba Materials Co., Ltd., Yokohama, JP;
Hidetoshi Fujii, Ibaraki Osaka, JP;
Yoshiaki Morisada, Ibaraki Osaka, JP;
Kai Funaki, Kanagawa, JP;
Isao Ikeda, Kanagawa, JP;
Yutaka Abe, Kanagawa, JP;
Masahiro Kato, Kanagawa, JP;
OSAKA UNIVERSITY, Suita, JP;
TOSHIBA MATERIALS CO., LTD., Yokohama, JP;
Abstract
The friction stir welding tool member according to the present invention is made of a ceramic member in which a shoulder portion and a probe portion are integrally formed, wherein a root portion of the probe portion and an end portion of the shoulder portion have a curved surface shape; and the friction stir welding tool member has a ratio (R1/D) of 0.02 or more and 0.20 or less when a curvature radius of the end portion of the shoulder portion is defined as R1 (mm) and an outer diameter of the shoulder portion is defined as D (mm). In addition, the ceramic member is preferably made of a silicon nitride sintered body having a Vickers hardness of 1400 HV1 or more. According to the above-described configuration, a friction stir welding tool member having excellent durability can be provided.