热镀锌冷却过程对C翘带钢影响及其优化技术

Effect of Cooling Processes of Hot Dip Galvanizing on C-warped Strip and Its Optimization Technology

针对热镀锌机组连续退火过程中带钢C翘导致镀层不均的问题,研究了热镀锌冷却过程核心工艺对带钢C翘板形的影响机理,建立了喷嘴冷却模型、喷嘴与带钢实际垂直距离分布模型等关键工艺模型,提出以翘曲抑制率、翘曲控制灵敏度为量化指标的C翘影响模型,给出了完整的风机关键工艺参数综合优化方法,实现了带钢精细化分区冷却控制。某热镀锌机组的应用表明该方法可有效降低机组出口带材翘曲程度。

In order to solve the problems of uneven coating on steel strip surfaces,which was caused by the C-warped strip in a continuous annealing processes of hot-dip galvanizing unit,the influence mechanism of core technology in the cooling processes of C-warped defects was studied.The key process models,such as nozzle cooling model and actual vertical distance distribution model between cooling nozzle and steel strip,were established respectively.The C-warping influence model with warping inhibition rate and warping control sensitivity as quantitative indexes were proposed.And then,a comprehensive optimization method for complete key process parameters of the fan was established,and was realized to cooling control of refined partition of steel strips.At last,the method was applied to the productions of a hot dip galvanizing unit.The results show that the warping degree of the steel strips at the outlet of the unit is effectively reduced.