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在开始轧制之前，由高压水除鳞装置利用高压水对坯料表面的氧化铁皮进行清理，以避免轧制过程中氧化铁皮的压入，从而保证***终产品质量。

Before starting rolling, the high pressure water descaling device is used to clean the scale of billet surface by high pressure water, so as to ***oid the indentation of oxide scale during rolling process, so as to ensure the final product quality.

轧钢方法按轧制温度的不同可分为冷轧与热轧；按轧制是轧件与轧辊的相对运动关系不同可分为纵轧，横轧和斜轧；按轧制产品的成型特点还可分为一般轧制，和特殊轧制。此外，由于轧制产品种类繁多，规格不一。

Rolling method can be divided into cold rolling and hot rolling according to the rolling temperature. According to rolling, the relative motion relati***hip between rolling piece and roller can be divided into longitudinal rolling, cross rolling and cross rolling. According to the forming characteristics of rolling products, it can also be divided into general rolling and special rolling. In addition, there are many kinds of rolling products and different specificati***.

采用控制轧制工艺时，为了防止原始奥氏体晶粒过分长大，一般采用较低的加热温度和开轧温度。由于开轧温度高，变形后的奥氏体晶粒会发生再结晶而细化，如在这个阶段停止变第八节控制轧制技术形，轧件即随温度下降而产生相变。

In order to prevent the original austenite grain growing too much, the lower heating temperature and rolling temperature are generally adopted in the rolling process. Due to the high rolling temperature, the austenite grain after the deformation will be recrystallized and refined. For example, the eighth section rolling technology is stopped at this stage, and the phase change is produced as the temperature drops.