The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 25, 2025
Filed:
Dec. 13, 2019
Applicant:
Sintokogio, Ltd., Nagoya, JP;
Inventors:
Assignee:
SINTOKOGIO, LTD., Nagoya, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N 23/20008 (2018.01); B24C 1/10 (2006.01); C21D 1/00 (2006.01); C21D 1/30 (2006.01); C21D 7/00 (2006.01); C21D 7/06 (2006.01); C21D 8/00 (2006.01); C21D 9/00 (2006.01); G01N 1/44 (2006.01);
U.S. Cl.
CPC ...
G01N 23/20008 (2013.01); B24C 1/10 (2013.01); C21D 1/00 (2013.01); C21D 1/30 (2013.01); C21D 7/00 (2013.01); C21D 7/06 (2013.01); C21D 8/00 (2013.01); C21D 8/005 (2013.01); C21D 9/00 (2013.01); G01N 1/44 (2013.01); G01N 2223/3037 (2013.01); G01N 2223/607 (2013.01);
Abstract
A metal material other than strain-free iron powder can be used as a reference piece for X-ray measurement of residual stress. The metal material is manufactured by nanocrystallizing at least a portion of a surface of a metal material, and then removing inherent strain by annealing the metal material, thereby eliminating stress.