Cold-rolled strip steel is a thin strip of steel made by cold extrusion (not heating, otherwise known as hot rolling). It is a material that uses cold water to roll steel into the shape we want. It is used by a machine in a very cold situation to use an extrusion method to make a thin steel with a strip shape from the material that has not been formed. This type of processing, and then cold processing to make the coils we need, including coils, coils, and wires. Cold-rolled steel coils also directly call cold-rolled steel strips as cold-rolled coils. At present, in terms of the treatment of iron and steel, it is in terms of cold treatment. The convex hull defect of cold-rolled steel coil has a very serious problem
Foreign countries claim that the main hazard of steel coil uplift is that when the convex hull defect reaches a certain level, the steel coil will form a local wave shape after uncoiling, which affects the user's use. For the research on the convex hull defects of cold-rolled steel coils, most of them think that the cause of the convex hull defects is the local high point of the strip caused by the local wear of the work rolls of the hot rolling finishing mill. Some people also think that the convex hull defects can be caused by the cold-rolled strip steel. Local waves. Cold-rolled strip steel is widely used in various fields because of its good surface flatness, smoothness, high stamping performance and dimensional accuracy, and its aging, low yield point, and better stamping performance. Construction, machinery, home appliances and coating industries. Its various advantages have made it widely used in various industries for a long time after its rapid rise.
