Analysis on Occurence and Cause of Linear Defects on Cold-rolled Sheet
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摘要: 利用场发射扫描电镜、能谱仪和金相显微镜等检测手段，对冷轧生产中出现的线状缺陷类型及其成因和影响因素进行了分析研究，结果表明常见的线状缺陷主要有气泡类、划伤类、夹杂类及氧化铁皮压入等类型，其中夹杂主要以连铸卷渣为主。并针对常见的线状缺陷提出了转炉炼钢、中间包冶炼、高压水除鳞等环节的工艺改进措施。Abstract: Types,causes and influencing factors of linear defects on cold-rolled sheet were analyzed by such detection means as field emission scanning electron microscopy,energy dispersive spectroscopy and optical microscopy.The results show that typical linear defects on the sheets include bubble,scratch,inclusion and press-in of iron oxide scale,and most of the inclusions are entrapped from casting powder.In order to eliminate those typical linear defects,countermeasures for the processes like converter steelmaking,tundish metallurgy,and high pressure water descaling are proposed.
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Key words:
- cold-rolled sheet /
- linear defect /
- forming reason /
- scratch /
- inclusion
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