公开(公告)号：US20220120308A1

公开(公告)日：2022-04-21

申请号：US17421171

申请日：2020-01-27

Applicant: FURUKAWA TECHNO MATERIAL CO., LTD.

Inventor： Sumio KISE ,  Toyonobu TANAKA ,  Kenji URUMA ,  Kouji ISHIKAWA ,  Nanami KATAOKA ,  Shigekazu YOKOYAMA ,  Toyohiko HIGASHIDA ,  Yoshitaka AZUMA

IPC: F16B35/00 ,  C22C9/05 ,  C22F1/08 ,  B21H3/02

Abstract: A formed body of Cu—Al—Mn-based shape-memory alloy may include a screw portion, wherein the screw portion is a form-rolled portion. A method for producing a formed body of Cu—Al—Mn-based shape-memory alloy may involve forming a screw portion having superelasticity by plastically working at least a portion of a material for the formed body with form-rolling in a state that a crystal structure is an A2-type structure and then, subjecting heat-treatment so as to convert the A2-type crystal structure into an L21-type crystal structure. The screw portion can be formed with good working property, and has excellent fatigue resistance and breaking resistance.