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针对冷轧产品易出现的黑斑缺陷问题,重点从退火工艺方面分析了缺陷产生的原因和机理,通过控制不同温度阶段的氢气吹扫工艺和退火温度制度,较好消除了黑斑缺陷,对提高冷轧退火卷钢板表面质量有一定的指导意义。
In order to deal with the problem of dark spot defect easily appearing in cold-rolled products, the causes and mechanism of defects are analyzed emphatically from the aspects of annealing process. By controlling hydrogen purging process and annealing temperature in different temperature stages, It is of guiding significance to improve the surface quality of cold-rolled annealed coil.