摘要
对某厂BOF-RH-CC生产的超低碳钢头坯夹杂物变化规律进行研究,结果表明:头坯中T[O]和氮含量均随着浇铸长度的增加呈明显的下降趋势;头坯中显微夹杂物数量和大型夹杂物数量随着浇铸长度的增加大体都呈减少趋势;头坯中显微夹杂物主要为:Al2O3、TiN和Al2O3-TiN复合夹杂物;大型夹杂物的来源主要为:TiN、SiO2、Al2O3、含K的铝硅酸盐和Na的钙铝硅酸盐复合夹杂物;与正常坯相比较,头坯夹杂物数量在浇铸长度为3.5 m以后与正常坯水平相一致。
Through studying the varying pattern of inclusions in the first slab of ultra-low carbon steel produced by BOF-RH-CC process,it is concluded that the nitrogen content and T[O] obviously decrease with increasing casting length;generally,the quantity of micro and large inclusions decrease with the increase of casting length.The micro inclusions in the first slab are mainly Al2O3,TiN and Al2O3-TiN,and the large inclusions are mainly TiN,SiO2,Al2O3,K-containing aluminosilicate and Na-containing calciumaluminum.This study suggests that the inclusion quantity in the first slab of ultra-low carbon steel is closed to the level of normal slab at and after the length of 3.5 m.
出处
《钢铁钒钛》
CAS
北大核心
2013年第3期59-62,66,共5页
Iron Steel Vanadium Titanium
关键词
超低碳钢
连铸头坯
夹杂物
洁净度
ultra-low carbon steel
the first slab
inclusion
cleanliness
