Metal structure evaluation apparatus of rolled steel sheet, metal structure evaluation method of rolled steel sheet, manufacturing equipment of steel, manufacturing method of steel, and quality control method of steel

摘要

The apparatus for evaluating the metal structure of a rolled steel sheet according to the present invention applies a magnetic field in one direction on the surface of the rolled steel sheet and measures the magnetic properties of the evaluation target point on the surface of the rolled steel sheet in at least two different magnetization directions. a magnetic property measuring unit that measures magnetic properties in at least two or more different magnetization directions with respect to the evaluation target point, and determining the metal structure at the evaluation target point using the magnetic properties measured by the magnetic property measuring unit A judging unit is provided.