On-line measurement of metallurgical transformation in hot-rolled steel

열연공정의 온라인 변태율 측정장치

The mechanical properties of a hot rolled steel is mostly governed by a cooling control on the run out table. During the cooling control, the hot rotted steel performs a metallurgical transformation(austenite ${\to}$ ferrite) which can be measured with a magnetic flux detector. The magnetic flux detector consisting of exciting and detecting coil can estimates the metallurgical transformation by measuring the variation of permeability in steel. We developed the method of detecting the magnetic property of hot rolled steel and processing the measured signal, Which makes possible to measure on-line metallurgical transformation.