分塊クロップロスに及ぼす偏熱の影響

概要

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Deformation process of unevenly heated ingot during blooming was experimentally investigated with respect to the relations among the shape of hot top, rolling method and uniformly heated ingot.It was found that the uneven deformation of ingot top increaes due to the uneven temperature distribution. Especially, nonuniformity in deformation was found in spread. As a result of above phenomenon, top crop loss of unevenly heated ingot increases comparing with that of uniformly heated ingot but the difference in bottom crop loss between unevenly heated ingot and uniformly heated ingot is little.Top crop loss decreases with decreaing hot top, but there is no effect of hot top on the volume of crop subtructed hot top from crop volume.The effect of hot top with a circular arc around the bottom on top crop loss is little. The effect of rolling direction on crop loss is significant and the crop loss decreases during top rolling.
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