公开(公告)号：US20230167533A1

公开(公告)日：2023-06-01

申请号：US18097536

申请日：2023-01-17

Applicant: CASIO COMPUTER CO., LTD.

Inventor： Junichi SATO ,  Kazuma KOBAYASHI ,  Shouta NAGASAWA ,  Kenichi INOUE ,  Chinfu LIU ,  Wuchien LIU ,  Tienchai LIN ,  Weipin KAO

IPC: C23C8/10 ,  C22F1/02 ,  C22F1/18

CPC classification number: C23C8/10 ,  C22F1/02 ,  C22F1/183 ,  C22C14/00

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.

公开(公告)号：US20190323114A1

公开(公告)日：2019-10-24

申请号：US16457938

申请日：2019-06-29

Applicant: CASIO COMPUTER CO., LTD.

Inventor： Junichi SATO ,  Kazuma KOBAYASHI ,  Shouta NAGASAWA ,  Kenichi INOUE ,  Chinfu LIU ,  Wuchien LIU ,  Tienchai LIN ,  Weipin KAO

IPC: C23C8/10 ,  C22F1/02 ,  C22F1/18

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.