A NOVEL METHOD TO DETECT, MEASURE AND ANALYZE INCLUSION BANDS IN CONTINUOUSLY CAST STEEL BILLETS USING ULTRASONIC C-SCAN IMAGE ANALYSIS

摘要

In the present method, rolling is not required and grain refinement of the cast sample is obtained by homogenizing of the sample at 1260°C in a heat treatment furnace. Transverse cut billet/slab slices are ground finish (mirror finish) to 18 mm thickness with parallel faces on which backscattered signals from the globular macro-inclusion are measured by an ultrasonic C-scan immersion system and analyzed using an image analyzing software.