As ppgi steel coils are widely used in many fields, they have the advantages of corrosion resistance and long life, and have higher requirements for product performance. For better applications, let's understand the reasons for the pressure spots on the surface of the ppgi steel coils.
Compared with the plate used in engineering projects, the base thick steel plate used in the ppgi steel coil has higher tensile strength, yield ratio and corresponding r and n values; and the paint film and the base thickness are required The bonding force of the board is strong, the coating has a certain degree of flexibility, and the corresponding compressive strength is low.
Color-coated coils are beneficial in cutting and uncoiling processing, but there is often a defect on its surface, that is, surface pressure spots, that is, when the color-coated thick steel plate is unrolled after baking and cooling, it is caused by the unwinding strength Slight deformation of the surface of the coating, and sometimes bulges and depressions on the surface, these phenomena are easy to see in visual impact. As the storage time of carbon steel increases, small spot defects will gradually disappear, and the temperature rise phenomenon can also be eliminated. Spotting is a kind of defect that appears in production. If you want to find out the cause and influencing factors of this kind of defect, you must go through repeated inspections, repeated inspections, and repeated revisions to the production plan to increase production costs.
The above is about the reasons for the pressure spots on the surface of the ppgi steel coils. You can choose the appropriate method according to the actual operation requirements to avoid unnecessary losses caused by blind operation. If you have other questions, you can pay attention to our website, and we will update the website regularly. Article, I hope it will be helpful to everyone.
