Learn about common rolling defects of 310S stainless steel plate

   In the process of 310S stainless steel plate, if the temperature of the steel is not uniform, there will be more material flow in the higher temperature area, but less in the lower temperature part, and the high temperature difference will lead to cracking.

   Compared with the average thickness of the edge of a steel strip or steel plate, the wedge is a measure of the thickness at an edge. It is hoped that there will be some protrusions in the steel, so that the rolling can be carried out with high stability. The rolling spring is a kind of defect, in which the thickness of the rolled plate is greater than the required thickness, the roll has been deflected by the high rolling force, and the elastic deformation of the mill occurs. If a harder roller is used, that is, a roller material with high stiffness or elastic constant, the deformation of the roller can be reduced.

It is difficult to maintain a uniform gap. The roller deflects under the load required to deform the steel part. The deflection causes the steel part to be thinner at the edge and thicker in the middle. This can be overcome by using a crowned roller, but the crowned roller compensates for a set of conditions, temperature and Deformation, other methods of compensating for roll deformation include continuous crowning. Another method is to reduce the load, which can be accomplished by applying tensile longitudinal force.

  The smoothness of rolled 310S stainless steel plate depends on the deflection of the roll. When the roll is deflected, the roll deflects elastically, and the rolled plate becomes thinner along the edge, and the thickness in the middle is relatively high. Due to the continuity of the sheet, it is under tension and the edges are compressed. Causes ripples along the edges and cracks along the zipper.

   If there are too many protrusions, edge cracks will appear. When the elongation is greater than the edge, this will happen, leading to defects. The edge defects are reduced, causing the defects to become larger and prone to corrugation or bending. During the rolling process, the steel plate has a tendency to deform in the transverse direction, and the friction force is high. The edge of the sheet is subjected to tensile deformation, resulting in edge cracks. If the sheet is strictly restricted and subjected to excessive tensile stress, splitting may occur, and the non-uniform material deformation in the thickness causes tensile stress along the edge.

   Due to the uneven flow of the material in the thickness of the 310S stainless steel plate, another alleged defect occurred, which is that the surface is stretched and compressed, and the material diffuses in the middle. Symmetrical edge wave, the steel material at the edge is longer than the middle material, asymmetrical edge wave, one side is wavy, one side of the steel is longer than the other side, surface defects appear as seams on the metal surface, when welded to the metal , It is a feather-like overlap, and it scabs when rolled into steel on a rolling scale.

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