ROLLED STEEL SHEET METAL STRUCTURE EVALUATION DEVICE, ROLLED STEEL SHEET METAL STRUCTURE EVALUATION METHOD, STEEL MATERIAL MANUFACTURING EQUIPMENT, STEEL MATERIAL MANUFACTURING METHOD, AND STEEL MATERIAL QUALITY CONTROL METHOD

摘要

A rolled steel sheet metal structure evaluation device according to the present invention comprises: a magnetic characteristic measurement unit that measures a magnetic characteristic in at least two different magnetization directions at an evaluation target point on a surface of a rolled steel sheet, by applying a magnetic field in one direction on the surface of the rolled steel sheet and performing, in at least two different magnetization directions, a process to measure the magnetic characteristic at the evaluation target point; and a determination unit that determines the metal structure of the evaluation target point using the magnetic characteristic that was measured by the magnetic characteristic measurement unit.