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:
Jul. 05, 2022
Filed:
Mar. 31, 2020
Nachi-fujikoshi Corp., Tokyo, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Nobuyuki Funahira, Toyama, JP;
Takuya Miyamoto, Toyama, JP;
Ryo Kawahara, Toyama, JP;
Akiyoshi Miyawaki, Wako, JP;
Mitsuru Sayama, Wako, JP;
Keisuke Tsuta, Wako, JP;
Yasumasa Hyodo, Wako, JP;
NACHI-FUJIKOSHI CORP., Tokyo, JP;
HONDA MOTOR CO., LTD., Tokyo, JP;
Abstract
The disclosure provides a friction stir welding tool which can inhibit chipping even if an adhesion matter having high hardness adheres to a tip thereof during friction stir welding of an iron-base alloy and an aluminum alloy. In the tool for friction stir welding made of high-speed tool steel that includes a minor diameter portion and a major diameter portion formed adjacently to the minor diameter portion, hardness of the tool decreases from the minor diameter portion toward the major diameter portion. The hardness of the minor diameter portion may be 65 HRC or more by Rockwell hardness C-scale, and the hardness of the major diameter portion may be 60 HRC or less by Rockwell hardness C-scale.