低碳钢边部线状缺陷形貌与成因对应性
Correspondence between Morphology and Genesis of Linear Defects on the Edge of Low Carbon Steel
陈松 1刘冠华 1栗建辉1
作者信息
- 1. 唐山钢铁集团有限责任公司,河北 唐山 063016
- 折叠
摘要
为了研究低碳钢边部线状缺陷形貌与成因对应性,选取某钢厂2050热轧生产线中4种不同形貌的线状缺陷,分别进行金相检验、扫描电镜和能谱分析.结果表明,边部黑线为双侧开口且裂口无延伸,长条状翘皮为双侧开口且裂纹向两侧延伸,短条状翘皮为双侧开口且裂纹向两侧延伸,断续长条状翘皮为单侧开口,裂纹向内延伸,裂口处存在折叠.分析认为,边部黑线成因是精轧划伤,长条状翘皮成因是连铸保护渣卷入,短条状翘皮成因是氧化铝夹杂,断续长条状翘皮成因是精轧前侧导板剐蹭.
Abstract
In order to study the correspondence between the morphology and genesis of linear defects on the edge of low carbon steel,four types of linear defects of 2050 production line of a steel plant were selected for metallographic examination,scanning electron microscopy and energy spectrum analysis.The results show that the black line on the edge is a double-sided opening with no extension of the crack,The long strip shell defect is a double-sided opening with cracks extending to both sides.The short strip shell defect is a double-sided opening with cracks extending to both sides.The interrupted strip shell defect is a single-sided opening with cracks extending inward.The analysis shows that the black line on the edge is caused by finishing rolling scratch,the long strip shell defect is caused by the involvement of the protective slag of continuous casting,the short strip shell defect is caused by alumina inclusion,and the interrupted strip shell defect is caused by the rubbing of the side guide plate before finishing rolling.
关键词
边部黑线/边部翘皮/保护渣卷入/氧化铝夹杂Key words
black line on the edge/shell defect on the edge/entanglement of protective slag/alumina inclusion引用本文复制引用
出版年
2024
NETL
NSTL
万方数据