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重点分析镀锡产品边部线状缺陷的生长机制和缺陷遗传规律。在大量现场试样分析的基础上,探讨轧制过程工艺对细线缺陷产生的影响。采用SEM,EDS等方式分析缺陷的形貌,成分及组织。结果表明,边部线状缺陷主要由炼钢的夹杂物、热轧带钢边部翘皮、氧化铁皮以及冷轧热轧工序边部擦划伤缺陷遗传所致。通过热轧辊形优化可以有效控制边部翘皮缺陷;通过系列工艺控制,可以有效避免夹杂物、擦划伤及氧化铁皮缺陷。镀锡产品边部线状缺陷率降低70%以上,产品质量得到有效改善。
Focus on the analysis of the growth of tin wire edge defects and genetic defect rules. On the basis of a large number of field sample analysis, the influence of the rolling process on the thin-line defects was discussed. SEM, EDS and other methods to analyze the defect morphology, composition and organization. The results show that the edge linear defect is mainly caused by the inclusions in the steelmaking, the warping of the edges of the hot rolled strip, the scale of the oxide scale and the scratches on the edges of the cold rolled hot rolling process. Through the optimization of hot roll shape, it can effectively control the edge warp flaw defects; through a series of process control, can effectively avoid inclusions, scratches and oxide scale defects. Tin-line products at the edge of the linear defect rate reduced by more than 70%, product quality has been effectively improved.