Transactions of Materials and Heat Treatment

Title：Cause summary and case analysis of edge crack defects during the cold rolling process of thin steel sheet

Authors： Yue Chongxiang Wu Shengjie Cao Lei Li Hualong

Unit： Institute of Research of Iron and Steel Shasteel Jiangsu Shasteel Group Co. Ltd.

KeyWords： cold rolling thin sheet metal edge crack

ClassificationCode：TG335

year,vol(issue):pagenumber：2014,39(11):107-111

Abstract：

In order to minimize edge crack defects during the cold rolling process of thin steel sheet, the main causes of such defects were analyzed and summarized systematically according to the management method of consistent system for cold rolling products. The result shows that there are three kinds of reasons causing edge crack defects: edge defects on cold rolling substrate, uneven microstructure of cold rolling substrate and improper cold rolling process control. Considering the above different types of edge crack defects in Shasteel, the reasons causing edge crack were determined by OM, SEM and EDS, and corresponding experimental measures, and then improving measures were put forward. After adopting those measures, defective rate of edge crack drops from 5% to 0.5% for cold rolling thin SPCC sheet metal in Shasteel.

Funds：

江苏沙钢集团技术中心创新能力建设项目（发改办高技［2012］989）

岳重祥(1982-)，男，博士，工程师

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