真空感应熔炼含铝钢的脱氧规律  

Deoxidizing Law of Aluminum-Containing Steel During VIM

作　　者：薛正良[1] 齐江华[1] 周国凡[1] 金焱[1] 胡会军 

机构地区：[1]武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室,湖北武汉430081 [2]张家港浦项不锈钢有限公司技术中心,江苏张家港215625

出　　处：《钢铁研究学报》2007年第11期18-20,共3页Journal of Iron and Steel Research

基　　金：国家自然科学基金;上海宝钢集团公司联合资助项目(50374054)

摘　　要：通过热力学分析研究了用氧化钙坩埚熔炼含铝钢时熔炼温度、真空度和钢液铝含量与氧化钙分解向钢液增氧的关系。在25kg真空感应炉中分别用电熔镁砂和氧化钙砂捣打坩埚熔炼含铝钢，在10～50Pa真空度下，镁砂坩埚表现出强烈的供氧倾向，全氧含量随着钢中铝烧损量的增加而增加；而氧化钙坩埚不向钢液供氧。随着钢液中Al2O3夹杂被氧化钙坩埚吸收同化，全氧的质量分数逐渐下降至3×10^-4。The effect of the smelting temperature, vacuum and aluminum content on oxygen pickup in molten steel originated from the decomposition of CaO lining is studied during vacuum induction melting aluminum-containing steel with the help of thermodynamics fundamentals. The smelting of aluminum-containing steel has been fulfilled by 25 kg vacuum induction furnace with the fused magnesia crucibles and calsia crucibles molded by ramming process. At the vacuum level from 10 Pa to 50 Pa, the magnesia crucible presented a strong tendency of oxygen pickup in molten steel from which the total oxygen content of steel was increased with the increasing of aluminum burning loss, When the calsia crucibles were used, the oxygen pickup in molten steel did not occur. Because the alumina inclusions in molten steel were assimilated by calsia crucible during vacuum induction melting, the total oxygen of the steel was gradually decreased to 0. 000 3%.

关 键 词：氧化钙坩埚 真空感应熔炼 含铝钢 极低氧钢 

分 类 号：TF133[冶金工程—冶金物理化学]