防火彩钢板表面为什么出现压斑？

防火彩钢板在剪切过程中，经常会出现一种表面缺陷，即表面压斑缺陷。缺陷是涂层冷却后烘烤轧制时，由于卷取张力，涂层表面略有变形。有时表面显得粗糙，可见压斑形状。是什么原因造成的？

随着防火彩钢板存放时间的延长，轻微的斑点缺陷会逐渐消失，可通过加热消除。但是，即使采取上述措施，更严重的缺陷也无法消除，从而影响用户的使用。点压是防火彩钢板生产过程中的一种缺陷。如果在生产过程中发现此类缺陷产生的原因和影响因素，需要多次停机检查和安排，会影响生产计划，增加生产成本。因此，有必要在实验室对缺陷进行模拟、复制和评估，找出缺陷产生的原因和影响缺陷的因素。

When the fireproof color steel plate is used in shearing, a kind of surface defect often appears, that is, surface pressure spot defect. The defect is that the coating surface is slightly deformed due to the coiling tension when the coating is baked and rolled after cooling. Sometimes the surface appears rough, showing the visual pressure spot shape. What causes this?

With the extension of the storage time of the fireproof color steel plate, the slight spot defects will disappear gradually, and can be eliminated by heating. However, even if the above measures are adopted, the more serious defects can not be eliminated, thus affecting the use of users. Spot pressing is a kind of defect in the production process of fireproof color steel plate. If the causes and influencing factors of this kind of defect are found in the production process, it needs to stop for many times to check and arrange, which will affect the production plan and increase the production cost. Therefore, it is necessary to simulate, copy and evaluate the defects in the laboratory to find out the causes of the defects and the factors influencing the defects.