轧钢工艺流程介绍（Introduction of rolling process）.docVIP

轧钢工艺流程介绍（Introduction of rolling process） Introduction of rolling process The billet produced from the steel mill is only a semi-finished product, and must be rolled in the steel mill before it can become a qualified product. Billet sent from the steelmaking plant, first into the furnace, and then through the rolling mill rolling after entering the finishing mill. Rolling pressure of metal processing, said simply, rolling plate as pressure noodles, after repeated extrusion and pushing the rolling pin of the surface, the more of the rolling thin. In the hot rolling line, the billet is heated and softened. It is fed into the mill by roller and finally rolled to the size required by the user. Steel rolling is a continuous and uninterrupted operation. The steel belt runs on the roller table with high speed, high automation and high efficiency. Out from the open hearth furnace steel ingot can be steel, but first of all, after heating and blooming can be sent to the hot rolling line, continuous casting process to switch to the more simple, general slab thickness is 150 ~ 250mm, after the removal to bloom, the roller into the finishing mill, finishing mill from 7 and 4 mill, equipped with machine guns before the roll and the flying shear, resection of the head board. The speed of finishing mill can reach 23m / s. Hot rolled products are divided into two types of steel coil and ingot type, after the hot-rolled rail thickness is generally several millimeters, if the user requires thinner steel, but also through cold rolling. Compared with hot rolling mill, the cold rolling mill is more dispersed, and cold-rolled products are mainly cold-rolled sheets and coated plates, namely tin plate, galvanized sheet and color coated sheet. After the steel coil sent by the hot rolling mill, we have to go through three successive technical treatments. First, we need to remove the oxide film with hydrochloric acid, then we can send it to the cold rolling mill. In the cold rolling mill, the