| 摘要 |
PURPOSE:To roll the product having no scale defect by a hot rolling mill by constraining the drop of a surface temp. by forming a scale removing means with three piece roller, brush roller and low pressure jet unit. CONSTITUTION:The steel stock temp. of a thin slab casting machine is about 1200-1250 deg.C and 1050-1100 deg.C are necessary at the biting time of a rolling mill but the conventional high pressure water descaling device can not be used because of its reducing the temp. A descaling means is therefore composed of the three piece roller 7 causing a crack on a scale by giving a bend on the surface of the steel stock, the brush roller 8 developping and peeling off the crack and the low pressure jet unit 9 removing the scale by spraying a water thereon. As a result the reduction in the surface temp. of the steel stock can be restrained and the necessary rolling temp. is secured to roll the steel stock having no scale defect by a hot rolling mill.
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