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What are the requirements for raw materials for steel cold rolling mill?
- May 29, 2018 -

During the operation of the steel cold rolling mill equipment, in order to ensure its good production status and obtain better quality products, there are often certain requirements for rolling raw materials. What are the requirements for raw materials for cold rolling mills? Next we will come together to understand the specific content.


First of all, prior to starting the steel cold rolling mill, it is necessary to conduct a corresponding inspection of the incoming materials, including chemical composition and dimensional deviations of the materials, in order to ensure compliance with the company's internal control standards. Second, the incoming material must be accurately wound with a constant strip tension. In addition, the material must be pickled, and the pickling quality is reasonable. The surface of the material is silvery white, rolled up tightly, rolled up, and tied up. There must be no problems such as loosening, collapse, and unwinding.


Moreover, in the process of inspection of incoming materials, it should be noted that the defects such as indentation, cracks, pits, roll marks, and scratches present above them must not exceed half of the thickness tolerance. And the deviation of width of trimming material should be kept in the range of 0~+3mm. The acid-washed edge of the material must not show any burrs and the weight of the coil must not exceed 30t. Keep in mind that the outside diameter of the coil rolled by the steel cold rolling mill needs to be controlled within the range of 1016 to 1981 mm.


In order to ensure the stable operation of the steel cold rolling mill, the materials used must not contain any obvious problems such as cracked edges, side strands, or strips bent more than 90°. And the coil tower shape should be less than 20mm, and the overflow between each coil in the coil is less than 5mm, and the overflow volume of the entire coil is less than 15mm. Under normal circumstances coils are not oiled. The material packaging is generally bare packaging, bundled together in the circumferential direction, and the deviation of the location of the brace and the center of the coil is within ±100mm.


Normally, when cold rolling mills are used, cold rolled strips and sheets having a thickness of 0.1 to 3 mm and a width of 100 to 2000 mm are mainly rolled at normal temperature. The cold-rolled strip and sheet obtained through the cold-rolling mill have the advantages of smooth surface, flatness, high dimensional accuracy and good mechanical properties, and are welcomed by users.