STEEL MATERIAL QUALITY DETERMINATION DEVICE AND STEEL MATERIAL QUALITY DETERMINATION METHOD

摘要

An object of the present invention is to determine the kind of a steel material, by which it can be judged stably and accurately whether the steel material consists of a carbon steel or a low-alloy steel. There is provided an apparatus for determining the kind of a steel material, including an image pickup device 11 for imaging a spark, which is produced when the steel material 18 is ground, continuously a plurality of times; a detection device 12 for detecting an alloy spark zone, which corresponds to an alloy spark produced by the grinding of an alloying component contained in the steel material, from each of picked-up images 2 imaged by the image pickup device; a calculation device 13 for calculating the total number of alloy spark zones detected by the detection device; and a judgment device 14 for determining that the steel material consists of a low-alloy steel if the total number is not smaller than a first threshold value, and determining that the steel material consists of a carbon steel if the total number is smaller than the first threshold value.