关键词: 热镀锌, C翘影响, 翘曲抑制率, 翘曲控制灵敏度

Abstract: 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.

Key words: hot dip galvanizing, influence for C-shaped warp defect, warping inhibition rate, warp control sensitivity