CSP热卷生产冷轧镀锌产品表面质量控制

Control of Surface Quality of Cold Rolled and Hot Dip Galvanized Strip From Hot Strip Produced by CSP

CSP工艺生产的热轧卷作为冷轧原料生产冷轧镀锌产品的表面质量较难控制。冷轧镀锌产品表面缺陷多种、共生,消除缺陷需要确定缺陷类别,产生工序和相应的控制点。讨论了一种由薄板坯纵裂纹衍生而产生的冷轧镀锌产品表面缺陷控制方法。通过对钢水精炼工艺和CSP铸机工艺参数的调整,此种表面缺陷控制取得明显效果。

It is very important and difficult to control surface quality of cold rolled and hot dip galvanized strip from the strip produced by CSP. Different kinds of surface defects are observed on the surface. For removing defects, defect types, working procedure and control points must be determined firstly. A kind of surface defect is described, and the reasons and control methods are discussed in detail. The parameters of secondary refining and thin slab casting were adjusted, to control surface defects of hot dip galvanized strip effectively.