公开(公告)号：US20240182994A1

公开(公告)日：2024-06-06

申请号：US18526078

申请日：2023-12-01

Applicant: SINTOKOGIO, LTD.

Inventor： Yuta Saito ,  Atsuki Kurokawa ,  Kan Aoki

IPC: C21D8/00 ,  C21D1/18 ,  C21D6/00 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46

CPC classification number: C21D8/005 ,  C21D1/18 ,  C21D6/004 ,  C21D6/005 ,  C21D6/008 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C21D2201/00 ,  C21D2211/001

Abstract: The manufacturing method of the reference piece for measuring retained austenite includes performing quenching and tempering a metal member after performing nano-crystallization on at least a portion of a surface of the metal member.