锻压技术

薄规格冷轧基板SPHC边部分层缺陷形成机理分析

英文标题：Analysis on forming mechanism of the side separation defect for thin cold-rolled substrate plate SPHC

作者：李化龙岳重祥谢达吴圣杰

关键词：冷轧基板 SPHC 边部分层缺陷

分类号：TG386.41

出版年,卷(期):页码：2016,41(3):123-128

摘要：

借助金相显微镜、扫描电镜和能谱仪等相关试验方法，对薄规格冷轧基板SPHC边部分层缺陷形成机理进行分析。对缺陷形貌、成分、金相组织、金属流线及轧制设备与工艺的综合分析结果表明，边部分层缺陷形成于精轧第6道次，该道次前钢板边部发生翻边是造成边部分层缺陷的直接原因；而钢板边部翻边是由于轧制过程中钢板严重跑偏，并与带有磨损凹槽的侧导板发生碰撞，钢板边部沿凹槽内缘上翘造成的。从避免钢板跑偏和侧导板严重磨损两方面采取措施后，成功地避免了该缺陷产生。

The forming mechanism of the side separation defect for thin cold-rolled substrate plate SPHC was analyzed by OM, SEM and EDS, and the defect morphology, composition, microstructure, metal flow line, rolling equipment and technology were analyzed comprehensively. The results show that the side flanging of thin plate directly leads to the separation defects in the sixth pass during the finishing rolling process. Because the thin plate deviates seriously from the center line during the rolling process, and collides with the side guide plate of worn grooves, and then the bending upwards of thin plate along the groove inner edge forms the side flanging of thin plate. Finally, the defect is removed successfully by avoiding serious deviation of thin plate and heavy wear of side guide after adopting the measure.

基金项目：

李化龙（1967-），男，博士，高级工程师通讯作者：岳重祥(1982-)，男，博士，工程师

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