非对称板形对连续退火炉内带钢跑偏的影响

 带有非对称板形缺陷的冷轧带钢在连续退火炉内运行时极易出现跑偏现象，尤其是单边浪的影响更为明显。为评价板形缺陷的非对称性，提出了板形不对称度评价指标，并通过对实际跑偏数据与不对称度的对比分析，发现当某段带钢的板形不对称度平均值超过0.5时，带钢极易跑偏，据此制定了连续退火生产线来料板形控制标准，实际应用后，因板形缺陷问题导致的连续退火炉内带钢跑偏断带事故次数由每年8次降至3次。

Influence of asymmetric flatness errors on strip wandering in continuous annealing lines

Asymmetric flatness errors have a great influence on strip wandering in continuous annealing lines，especially the edge buckle. In order to present the asymmetry of flatness，asymmetry ratio is introduced. The relationship between strip wandering distance and asymmetry ratio is analyzed，which shows when the average asymmetry ratio of a length of strip rises above 0.5，the wandering distance of strips also increases. On the basic of analysis a standard of strip flatness produced by cold rolling progress is determined，with which the number of strip break in annealing line caused by flatness errors falls from 8 times per year to 3 times per year.