| 摘要 |
PURPOSE:To improve the yield of blooming by pressing the leading and trailing ends of blooms of a rectangular section produced by a continuous casting process prior to blooming. CONSTITUTION:Blooms B of a rectangular section which are cast by a continuous bloom casting machine 21 and are cut to suitable lengths by a gas cutter 22 or blooms B which are continuously cast and are heated by a heating furnace 23 are fed into a pressing device 24. The leading and trailing end parts thereof are reduced down to a suitable thickness within a >=250mm. range from the end parts and the end parts are bulged to a projecting shape by means of a pair of upper and lower dies of a device 24 while the longer sides of the blooms B are restrained. After these are rolled down to a prescribed size with the 1st blooming mill 25, they are scarfed away of the surface flaws with a hot scarfer 26 depending upon cases, and are rolled down to billets of square sections and sizes by continuous rolling mills 27. The billets are cut to required sizes with a shear 28. |
