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***.
纵轧是纵向轧制的简称，是被轧物体通过两个反向转动的轧辊得到加工的轧制方法，轧制时轧件通过辊面间缝隙向前运动，其运动方向与轧辊轴线垂直。我国经济一直快速稳定发展，而轧钢设备行业也是迅速发展，在我国轧钢机设备行业中，自动化和计算机控制系统主要还是靠引进。纵轧是轧制中***常见的一种轧制方法，横轧是轧件围绕自身中心线在轧辊间旋转，并且轧件旋转中心线与轧辊轴线平行，轧件只在横向受到压力加工的一种轧制的方法。
Longitudinal rolling is the abbreviation of longitudinal rolling. It is the rolling method of rolled object through two reversing rolls. When rolling, the workpiece moves forward through the gap between the rolls, and its direction of motion is perpendicular to the axis of the roller. Longitudinal rolling is the most common rolling method in rolling. Cross rolling is a rolling method for rolling pieces that rotate around the center line between the rolls, and the axis of the rolling piece is parallel to the axis of the rolls. The rolling piece is only subjected to pressure on the transverse side.
棒材精轧件后为什么要采用穿水冷却工艺？（1）提高了产品的力学性能；从金属学角度来看，热轧与冷轧的界限应该以金属再结晶的温度来区分，即低于再结晶温度的轧制为冷轧。（2）减少了产品表面二次氧化损失；（3）穿水后，由于轧件温度低，刚度大，在冷床输入辊道上事故减少，轧件在冷床上冷却时塌腰弯曲减少，可以提高成材率和产品质量；（4）冷床长度可相应减少。
Why do we need to wear water cooling technology after finishing bar?
(1) improve the mechanical properties of the product; (2) reduce the two oxidation loss on the surface of the product; (3) after water, because the rolling temperature is low, the stiffness is large, the accident on the roller table of the cold bed is reduced, the bending of the rolled piece in the cold bed is reduced, the yield and quality of the product can be improved; (4) the length of the cold bed can be reduced correspondingly.
