Patent ID: 11933762
Assignee: JFE STEEL CORPORATION
Field: Measurement (Instruments)
Classification: CPC C  G  B | IPC B  G

Claim 0:
1. A metal structure evaluator for rolled steel sheets, the metal structure evaluator comprising:
a magnetic property measuring unit configured to measure a magnetic property of an evaluation target point in at least two different magnetization directions by performing, in the at least two different magnetization directions, the processes of:
applying a magnetic field on a surface of a rolled steel sheet in one magnetization direction, and
measuring a magnetic property of the evaluation target point on the surface of the rolled steel sheet; and

a determiner configured to determine a metal structure of the evaluation target point based on the magnetic property measured by the magnetic property measuring unit,
wherein the determiner is configured to:
calculate a cyclic fluctuation component for distinguishing the metal structure from the cyclic fluctuation component of the magnetic property in the magnetization direction, and
determine the metal structure of the evaluation target point based on the cyclic fluctuation component.