宽厚板包晶钢的保护渣  

Mold fluxes of peritectic steel for wide and thick slabs

作　　者：巴钧涛[1] 文光华[1] 唐萍[1] 赵艳红[1] 迟景灏[1] 职建军[2] 徐国栋[2] 

机构地区：[1]重庆大学材料科学与工程学院,重庆400044 [2]宝山钢铁股份有限公司炼钢部,上海201900

出　　处：《北京科技大学学报》2009年第6期696-700,共5页Journal of University of Science and Technology Beijing

基　　金：重庆市科委自然科学基金计划资助项目(No.CSTC/2008BB4036);宝山钢铁股份有限公司资助项目(No.4207520070397)

摘　　要：针对包晶钢的凝固特性,研发了高碱度、高结晶速率、低结晶温度及低热流密度保护渣,并在宝钢3#连铸机上进行了试验研究.现场试验四个浇次的结果表明,使用改进渣的试验流铸坯无纵裂发生,而使用原渣的对比流铸坯裂纹率达到5%.优化保护渣有效防止了铸坯表面纵裂的发生.According to the solidified characteristic of peritectic steel for wide and thick slabs, mold fluxes with high basicity, high crystallization rate, low crystallization temperature and low heat flux density were developed and experimentally studied on 3# Caster at BaoSteel. The trial results of 4 casting times showed that experimental strands produced with the developed mold fluxes had not surface longitudinal cracks, but the surface longitudinal crack ratio of strands produced with original mold fluxes was 5 %. The developed mold fluxes can prevent surface longitudinal cracks in wide and thick slabs effectively.

关 键 词：保护渣 渣膜 表面纵裂 热流密度 结晶速率 结晶温度 

分 类 号：TF777.1[冶金工程—钢铁冶金]