ABSTRACT
The defect is the result of local plastic deformation of the sheet steel on account of extension or combined extension and flexure of the cold-rolled strip. On all technological redistribution of thin-sheet steel production, there are various defects. The continuous evolution of steel production constantly poses new problems in terms of maintaining defect-free sheet surfaces with specified microrelief. The appearance of the defects, their length and frequency, and their periodicity over the length of the strip depend on its thickness, the thickness of the tension rollers, the degree of welding of the turns, the tensile forces in the strip on uncoiling, the temperature, and the metal’s yield point. Analysis confirms that the appearance of kinking defects depends primarily on the adhesion or welding of the adjacent turns in the coil. Despite extensive research on kinking defects, their formation is still poorly understood.
