平辊轧制15crmo合金钢板有什么好处?
The rolling process is a process in which the rolling piece is subjected to plastic deformation by compression when the roll is moved by the rolling (metal). If the roll body is a uniform cylinder, such a roll is called a flat roll, and the15 crmo合金钢板采用平辊轧制，称为平辊轧制。
Flat roll rolling is the most important pressure processing method for producing plates, strips and foils. Figure 3-1 shows the force of the rolling stock during rolling. It can be seen from the figure that the rolling is dragged between the rolls by the frictional force (T) of the rotating rolls, and the rolling force is applied to the rolls by the pressure applied by the rolls. A method of material processing in which compression deformation occurs. After the rolling stock is rolled, not only the thickness of the rolled product is thinned, but also the structure and properties of the rolled product are improved and improved.
If the12 cr1mov合金钢板采用热轧，使钢锭的粗晶破碎，组织致密;冷轧可以使金属晶粒断裂变细，提高15CrMo合金板的强度，简单轧制工艺和轧制变形参数如图3 -1所示。而为了便于研究，往往将简单轧制过程简化为理想的简单轧制过程。简单轧制工艺应具备以下条件:两辊主传动辊、轧辊直径是一样的,旋转速度是相等的,辊是一块刚性滚除了辊的作用,和不受任何外力的影响(张力或推力时轧件高)当压缩卷,金属会向纵、横两个方向流动，即轧制产品的高(厚)方向被压缩，轧制15CrMo合金钢板的长、宽增加。
However, the longitudinal extension deformation always exceeds the lateral expansion amount (widening), because the friction of the roller surface is always more obstructive to the wide flow than the longitudinal direction, that is, the lateral width is always relative to the longitudinal deformation. smaller. In the rolling deformation process, high-direction compression is the dominant deformation and is the basis for studying the rolling problem. The index indicating the degree of deformation is usually referred to as the deformation index.
The deformation index commonly used in the rolling of 15CrMo alloy sheet is shown in the area where the rolling deformation of the rolled piece between the rolls is called the rolling deformation zone. It is the contact arc AB, A'B' between the rolling stock and the roll, and rolling. The vertical section of the person's roll. The area enclosed by the vertical section BB' of the AA' and the exit roller is called the geometric deformation zone, or the ideal deformation zone (see in fact, the 15CrMo alloy plate becomes the human roll and the exit section of the Hebei steel recombination in the geometric deformation zone. In the nearby area, there are more or less plastic deformations of the rolled parts, which are called front and back non-contact deformation zones.
In addition, when the hot-rolled parts are hot-rolled, the deformation is not easily penetrated, so that some of the metal is hardly plastically deformed in the geometrically deformed region, forming a so-called hard-to-deformation zone. The basic parameters describing the rolling geometric deformation zone are: contact angle a, deformation zone length I (horizontal projection of the contact arc), average thickness of the rolled piece, two (H +.h)/2 and deformation zone shape factor, and B /h},), H, h are the thickness before and after rolling of the rolled piece, and B is the width of the rolled piece.
The geometric deformation zone of a rolling is gradually reduced, and the process of rolling the 1Cr5Mo alloy steel plate is easier than that of starting the bite. The rolling conditions are easier to achieve than the biting conditions. When other conditions (lubrication condition, pressure) When the amount is constant, the rolled piece can be naturally filled between the rolls until a stable rolling process is established.
Measures to improve the difficulty of biting into the piece According to Equations 3-12 and 3-10, the main measures to improve the difficulty of rolling biting are: When Δh is constant, the larger the diameter D of the roll, the smaller the bite angle is, the easier it is. Biting people. When the roll diameter D is constant, the larger the reduction amount Ah, the more difficult it is to bite. Therefore, in order to improve the biting difficulty in the production of 15CrMo alloy steel sheets, the front end of the rolled product is often formed into a wedge shape or a circular arc shape.
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