US 11,953,047 B2
Formed body of Cu—Al—Mn-based shape-memory alloy and method for producing same
Sumio Kise, Hiratsuka (JP); Toyonobu Tanaka, Hiratsuka (JP); Kenji Uruma, Hiratsuka (JP); Kouji Ishikawa, Hiratsuka (JP); Nanami Kataoka, Osaka (JP); Shigekazu Yokoyama, Osaka (JP); Toyohiko Higashida, Osaka (JP); and Yoshitaka Azuma, Osaka (JP)
Assigned to FURUKAWA TECHNO MATERIAL CO., LTD., Hiratsuka (JP)
Appl. No. 17/421,171
Filed by FURUKAWA TECHNO MATERIAL CO., LTD., Hiratsuka (JP)
PCT Filed Jan. 27, 2020, PCT No. PCT/JP2020/002834
§ 371(c)(1), (2) Date Jul. 7, 2021,
PCT Pub. No. WO2020/158684, PCT Pub. Date Aug. 6, 2020.
Claims priority of application No. 2019-016373 (JP), filed on Jan. 31, 2019.
Prior Publication US 2022/0120308 A1, Apr. 21, 2022
Int. Cl. F16B 35/00 (2006.01); B21H 3/02 (2006.01); C22C 9/05 (2006.01); C22F 1/08 (2006.01)
CPC F16B 35/00 (2013.01) [B21H 3/02 (2013.01); C22C 9/05 (2013.01); C22F 1/08 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A formed body, comprising:
Cu—Al—Mn-based shape-memory alloy comprising a screw portion,
wherein the screw portion is a form-rolled portions,
wherein the screw portion has an Hs/Ho ratio of 1.1 or more when measured in a cross section including an axis of the screw portion for Hs and Ho,
wherein Hs is an average Vickers hardness of a surface layer portion of the screw portion, and Ho is an average Vickers hardness of a central portion of the screw portion.