APPARATUS AND METHOD FOR DETERMINING KIND OF STEEL MATERIAL

摘要

Disclosed are a device and a method for determining material quality of a steel material capable of stably and accurately discriminating between steel materials composed of high-strength steel to which additives for improving the strength of the steel are added and those composed of ordinary steel to which the additives are not added. Specifically, a device (1) for determining material quality of a steel material detects spark pixels from captured color images (2) of sparks (19) produced when a steel material (18) is rubbed, detects pixels of which density of one of color components for discrimination selected from RGB components is low from the spark pixels as low-density pixels, determines that the steel material is composed of the high-strength steel when a ratio of the total number of the low-density pixels to the total number of the spark pixels is more than or equal to a threshold for discrimination, and determines that the steel material is composed of the ordinary steel when the ratio is less than the threshold for discrimination.