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:
Feb. 14, 2023
Filed:
Jun. 29, 2019
Casio Computer Co., Ltd., Tokyo, JP;
Junichi Sato, Hino, JP;
Kazuma Kobayashi, Fuchu, JP;
Shouta Nagasawa, Machida, JP;
Kenichi Inoue, Hamura, JP;
Chinfu Liu, Guangdong, CN;
Wuchien Liu, Guangdong, CN;
Tienchai Lin, Kaohsiung, TW;
Weipin Kao, Kaohsiung, TW;
CASIO COMPUTER CO., LTD., Tokyo, JP;
Abstract
The present disclosure relates to a titanium or titanium alloy member and to a surface hardening method for the titanium or titanium alloy member. The titanium or titanium alloy member includes a base material of titanium or titanium alloy, and at a surface of the base material, a hardened layer formed by diffusion of oxygen into the surface. The method includes: a heating step of heating the titanium or titanium alloy base material of the member to a predetermined temperature under an inert gas atmosphere; a hardening step of introducing (i) a mixed gas including an inert gas, and (ii) oxygen gas as a hardening treatment gas, to perform hardening treatment of the surface of the base material; and a cooling step of cooling the base material down to room temperature under the inert gas atmosphere.