Waves on the edge of the stainless steel plate / One customer complained that the purchased batch of stainless steel plate was found to have undulations on the edge during use, which affected its use. After on-site inspection, the wavy undulations mentioned by the customer are side waves, with a wave height of 3 mm and a length of about 300 mm. Due to the customer's need for edge welding, the presence of waves makes welding difficult. The cause of the edge wave is that the edge of the steel plate is stretched too far, causing the length of the edge to be greater than the internal length. The main causes are the thermal crown of the roll, the inappropriate curve of the roll, the uneven pressure of the roll, the reduction and tension, the raw material. The thermal convexity is poor. For the defect of edge wave, it is difficult to eliminate in the leveling process, because the straightening in the leveling process is generally only repeated bending in the leveling roller to eliminate the bending stress of the original steel plate, in the absence of tensile stress It is difficult to eliminate side waves. However, by straightening some leveling rollers with smaller roller diameters and properly adjusting the reduction of the middle rollers, the existence of edge waves can still be improved very well. Since the side wave is difficult to eliminate, and the requirements of the national standard for the side wave are very loose, so for customers with high plate shape requirements, they should be noted in the special requirements when taking orders, and the customer is not very familiar with stainless steel, so No explanation was given, which led to this objection. Replace a batch of steel plates for customers and the defects of these steel plates with edge waves are not serious. Within the internal control standard, they can be sold to customers with low requirements.