Patent ID: 11898985
Assignee: JFE STEEL CORPORATION
Field: nan (nan)
Classification: CPC nan | IPC B  G

Claim 4:
5. A method for evaluating a metal structure of a rolled steel sheet, the method comprising:
a magnetic property measuring step of measuring 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 determining step of determining a metal structure of the evaluation target point based on the magnetic property measured at the magnetic property measuring step,
wherein the determining step includes:
calculating a cyclic fluctuation component for distinguishing the metal structure from the cyclic fluctuation component of the magnetic property in the magnetization direction, and
determining the metal structure of the evaluation target point based on the cyclic fluctuation component.