| 摘要 |
<p>PURPOSE: To suppress defects in shape such as the camber of flange and waving of web by cooling a material to be rolled on the inlet side of finish universal rolling and controlling the temp. of the material to be rolled at the time of finish universal rolling to the predetermined target temp. CONSTITUTION: A shape having high correlation to the temp. of the material to be rolled (base stock) at the time of finish rolling, especially, the temp. of the flange is preliminarily investigated, the temp. of the flange of the base stock at which the shape is good is determined, the temp. at which the good shape of the flange is attained by adjusting the transporting speed of the base stock, using pattern of banks in water-cooling zones 4 before the finish universal rolling 3, flow rate of the cooling water, etc., based on the temp. of the base stock after the finish universal rolling and the finish universal rolling is executed. And, cooling is executed so that the temp. of the base stock, especially, the temp. in the middle part of flange is fell in the target temp. range and simultaneously the temp. difference between the web and the flange of the wide flange shape on the outlet side of the final cooling zone (the cooling zone 5 arranged on the outlet side of the finishing universal mill 3) falls in the target range.</p> |
