US 12,320,010 B2
Alloy member and method for hardening surface thereof
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); and Weipin Kao, Kaohsiung (TW)
Assigned to CASIO COMPUTER CO., LTD., Tokyo (JP)
Filed by CASIO COMPUTER CO., LTD., Tokyo (JP)
Filed on Jan. 17, 2023, as Appl. No. 18/097,536.
Application 18/097,536 is a division of application No. 16/457,938, filed on Jun. 29, 2019, granted, now 11,578,399.
Application 16/457,938 is a continuation in part of application No. PCT/JP2017/047224, filed on Dec. 28, 2017.
Claims priority of application No. 201710000671.1 (CN), filed on Jan. 3, 2017; and application No. 201711284040.3 (CN), filed on Dec. 7, 2017.
Prior Publication US 2023/0167533 A1, Jun. 1, 2023
Int. Cl. C23C 8/10 (2006.01); C22F 1/02 (2006.01); C22F 1/18 (2006.01); C22C 14/00 (2006.01)
CPC C23C 8/10 (2013.01) [C22F 1/02 (2013.01); C22F 1/183 (2013.01); C22C 14/00 (2013.01)] 9 Claims
OG exemplary drawing
 
1. An alloy member comprising:
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,
wherein the hardened layer includes (i) a surface transparent oxide layer, and (ii) a diffusion layer disposed internally from the surface transparent oxide layer.