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.
出处
《连铸》
2015年第4期74-77,共4页
Continuous Casting
关键词
薄板坯
高拉速
内部质量
控制
thin slab
high speed
inner quality
control
