摘要
针对带钢存在的冷弯断裂及分层现象多、冷弯一次合格率低的问题,采用XL30扫描电镜、金相显微镜等,对冷弯不合格的带钢取样进行组织、夹杂物、晶粒度、断口等检验和氧含量分析并与正常试样对比。结果表明:钢中氧含量高、夹杂物多是导致带钢冷弯不合格的主要原因。通过采取炉前加大脱氧剂用量,对夹杂物进行变性处理等深脱氧技术及保护浇注,优化连铸工艺等措施,钢材全氧含量由153.5×10-6降到100×10-6,冷弯一次合格率由97.5%提高到99.0%。
Pointing to some problems of strip steel, such as cold bending rupture, more layer phenomenon, low one qualified rate of cold bending, the examination and analysis included microstructure, inclusions, graininess, fracture, oxygen content of unqualified cold bending strip were done by means of XL30 scanner, metallographic microscope and so on. The result shows that the unqualified cause of cold bending strip steel main is high oxygen content, high inclusion content, etc. Through adopting some measures consisted of raising deoxidizing agent quantity, taking on denaturation treatment for inclusion, protecting pour, optimizing continuous casting, etc, the whole oxygen content of steel is decreased from 153.5×10^(-6) to 100×10^(-6), and the one qualified rate of cold bending is increased from 97.5% to 99.0%.
出处
《山东冶金》
CAS
2004年第2期48-50,共3页
Shandong Metallurgy
