薄板坯连铸机高拉速下铸坯内部质量控制实践  

Slab inner quality control practice of thin slab caster in high drawing speed

作　　者：李梦曦 马坤霞[1] 付建军[1] 郝立卿[1] 

机构地区：[1]河北钢铁股份有限公司唐山分公司热轧部,河北唐山063009

出　　处：《连铸》2015年第4期74-77,共4页Continuous Casting

摘　　要：针对薄板坯连铸机高拉速生产过程中存在的板坯内部裂纹、中心偏析、中心疏松等缺陷,分析了连铸坯内部缺陷的形成机理,通过合理控制压下终点位置、改善二冷水量和提高设备安装精度的措施,铸坯内部质量明显改善。按照Mannesmann标准评定,中碳钢的内部裂纹平均为1.5级、偏析为1级,低碳钢内部裂纹和偏析均达到1级。For solving the problems such as inner crack,central segregation and central porosity of slab in high speed thin slab continuous casting,the formation mechanism of slab inner defect were analyzed. Through controlling reduction ending positions,improving secondary cooling water and equipments installation accuracy,the slab＇s inner quality was improved obviously. According to Mannesmann criteria for evaluation,the level of central crack of medium carbon was 1.5,and the level of central segregation of medium carbon steel was 1,and the level of central crack and central segregation of low carbon steel were 1.

关 键 词：薄板坯 高拉速 内部质量 控制 

分 类 号：TF341.6[冶金工程—冶金机械及自动化]