Tanaka Kikinzoku Kogyo K.K.;Tokyo Institute of Technology
发明人:
HOSODA Hideki,UMISE Akira,GOTO Kenji
申请号：
EP18847810
公开号：
EP3674431A1
申请日:
2018.08.09
申请国别(地区):
EP
年份:
2020
代理人:
摘要：
The present invention provides an artifactless superelastic alloy including a Au-Cu-Al alloy, the superelastic alloy containing Cu in an amount of 20 atom% or more and 40 atom% or less, Al in an amount of 15 atom% or more and 25 atom% or less, and Au as a balance, the superelastic alloy having a bulk magnetic susceptibility of -24 ppm or more and 6 ppm or less. The Ni-free superelastic alloy of the present invention is capable of exhibiting superelasticity in a normal temperature range, and hardly generated artifacts in a magnetic field environment. The alloy can be produced by setting a casting time in a melting and casting step to a fixed time, and hot-pressing an alloy after casting to make material structures homogeneous.
