Cold Rolled Steel Plate Common Defects

Edge crack defect
The accumulation of large inclusions at the edge is one of the main causes of edge cracking. Due to the use of funnel mold in thin slab, the flow, heat transfer and liquid level fluctuation in the mold are more complex than in the traditional slab continuous casting. In the casting process, slag rolling is often caused. A part of slag rolling remains on the surface of the slab to form surface inclusion, and large inclusion particles are deposited on the edge of the slab, resulting in the enrichment of large oxide inclusion on the edge.
Iron oxide pressing defect
The incomplete primary oxide is pressed into the strip during the subsequent rolling process, resulting in surface defects of the strip. The key to the pressing defects of the secondary oxide sheet is that the secondary descaling water is not opened. The defect tracking results show that the pressing defects of the oxide sheet can be basically eliminated in the subsequent pickling and cold rolling process, and have no effect on the cold rolled sheet.