转炉-LF-VD-CC流程轴承钢显微夹杂物的分析  

An Analysis on Micro-Inclusion in Bearing Steel at Each Procedure of BOF-LF-VD-CC Flow Sheet

作　　者：杜珊[1] 闫绍维[2] 王硕明[2] 刘宪民[3] 

机构地区：[1]河北理工大学计算机与自动控制学院,唐山063009 [2]河北理工大学冶金与能源学院,唐山063009 [3]石家庄钢铁有限责任公司,石家庄050031

出　　处：《特殊钢》2007年第5期16-18,共3页Special Steel

基　　金：本研究得到国家科技部重点推广项目基金资助(项目编号:2004EC000059);河北省自然科学基金(编号:502263)

摘　　要：系统分析了石钢45 t顶底复吹转炉-LF-VD-中间包冶金过程各工序轴承钢中显微夹杂物的行为、特征、数量及变化历程。钢中的夹杂物由LF处理前的块状Al_2O_3、铬硅酸盐和铬锰酸盐逐步转变为铸坯中的铬钙酸盐、球状铬硅酸盐和条状铬锰酸盐夹杂;显微夹杂数量平均值由LF处理前8.74个/mm^2减少为铸坯中2.72个/mm^2,夹杂物尺寸亦减小。The behavior, characteristics, amount and transformation of micro-inclusion in bearing steel at each procedure of 45 t BOF-LF-VD-CC flow sheet at Shijiazhuang Steel have been studied by added tracer elements. Results showed that inclusions in steel before LF refining were gradually transformed from blocky Al2O3 , chromic-silicate and chrom/c-manganate to calcium chromate, globular chromic-silicate and banding chromic-manganate inclusions in cast billet; and the average number of micro-inclusions in steel decreased from 8. 74/mm^2 before LF to 2. 72/mm^2 in billet while the size of inclusions also decreased.

关 键 词：转炉流程 轴承钢 显微夹杂 

分 类 号：TF713[冶金工程—钢铁冶金]