| 摘要 |
PURPOSE:To detect a joint with good accuracy, to decrease the crop quantity at the joint and to improve yield by measuring continuously the temp. of a solidified ingot and detecting the part below the set temp. as the joint. CONSTITUTION:A molten steel 3 in a ladle 2 is cast via a tundish 4 into a casting mold 6 and the formed ingot 8 is cut to a prescribed length by a cutter 16 via a guide roll group 10, leveling rolls 12 and pinch rolls 14. A surface thermometer 18 measures continuously the surface temp. of the ingot 8 and feeds a signal via a temp. converter 20 to a joint detector 22. The temp. decreases sharply at the joint and since the lower limit temp. is preliminarily set in the detector 22, the detector discriminates the joint when the surface temp. decreases to the lower temp. or below and outputs a signal to a lower limit alarm which in turn emits a signal to that effect.
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