Cold rolling production process knowledge question and answer
Release time:
2022-06-23
What are the requirements of cold rolled sheet for rolling mill?
1. What are the requirements of the rolling mill for the incoming materials of cold rolled plates?
Answer: 1) The chemical composition of steel should comply with the provisions of national standards.
2) The thickness and width of incoming materials shall meet the requirements.
3) No oxide scale on the surface, no cracks on the edge, etc.
4) No strip scratches, imprints, pressure pits, convex bubbles, delamination and other defects.
5) Strip steel has no tower shape, loose coil, etc.
2. What are the main shape defects of cold rolled strip steel?
Answer: "sickle bend", "wave shape", "scoop curve". There are many types of wave shapes, such as one side wave, two side wave, middle wave, two rib wave, periodic wave and local wave.
3. What effect does the shape defect have on the cold rolling process?
Answer: Poor plate shape has a great influence on the cold rolling process and brings difficulties to the actual operation. Serious sickle bending will cause deviation and belt breakage, while wave shape will lead to roller and belt breakage accidents. Poor plate shape limits the improvement of speed, thus affecting the production capacity of the rolling mill. In addition, poor plate shape also limits the small thickness that the rolling mill can produce.
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