公开(公告)号：US20220220581A1

公开(公告)日：2022-07-14

申请号：US17614486

申请日：2020-04-30

Applicant: FURUKAWA TECHNO MATERIAL CO., LTD. ,  FURUKAWA ELECTRIC CO., LTD.

Inventor： Fumiyoshi YAMASHITA ,  Sumio KISE ,  Kenji URUMA

IPC: C22C19/03 ,  C21D8/10 ,  C21D8/06

Abstract: A Ni—Ti-based alloy material includes a matrix phase consisting essentially of a Ni—Ti-based alloy and having a B2 type crystal structure. A nonmetallic inclusion is present in the matrix phase, in which 99% by mass or more of the nonmetallic inclusion is a TiC-based inclusion having a NaCl type crystal structure, the TiC-based inclusion has a lattice misfit (δ) in a range of 0.4238 or more and 0.4259 or less. The lattice misfit (δ) is represented by Expression δ=(a1−a2)/a2, where a1 is a lattice constant (Å) of the TiC-based inclusion and a2 is a lattice constant (Å) of the matrix phase.

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.