宽厚板包晶钢的保护渣

Mold fluxes of peritectic steel for wide and thick slabs

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.

Abstract: 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.