| 摘要 |
<p>PURPOSE:To manufacture medium air steels at high production efficiency by executing continuous bar rolling containing the division in the axial direction without cooling a hot rolled sheet to the vicinity of the normal temp., taking the sheet in a cooling bed as multiple lines and cooling them. CONSTITUTION:A cast slab (a) is sent into a continuous heating/heat insulating furnace 1 from a continuous casting machine. The heated cast slab is sent to a hot rolling line A and rough rolling and finish rolling are executed with a hot rolling mill 4. The hot rolled sheet (b) obtained in this stage is coiled in a carrier type coil box 5. A bar rolling line B is installed beside the hot rolling line A, a continuous heating equipment 6 and continuous bar rolling mill 7 are installed and then a cooling bed 8 is installed. The outlet side of the cooling bed is continued to a cutting/finishing line through a leveler. In this way, while reducing the number of strand for continuous casting, medium and small bar steel can be manufactured at high production efficiency and the hot rolled sheet and medium/small bar steel can be produced in combination.</p> |
