| 摘要 |
PURPOSE:To improve the quality by injecting cooling water so that the surface temp. of the last solidified part in a cast slab positioned at suitable position in light draft roll group becomes the prescribed temp. and also giving the draft force at the fixed strain speed by the light draft roll group. CONSTITUTION:The last solidified part of the cast slab 30 is positioned at the suitable position in the light draft roll group 18 by controlling drawing speed, cooling speed and the rolling reduction rate, and the surface temp. of the cast slab 30 is made to 700-800 deg.C by controlling the injecting water rate to the cast slab 30, and the draft force at 0.2-0.4%/min the strain speed by the light draft roll group 18. By this method, the quality is improved.
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