不同脱氧工艺对SG45VCM钢中夹杂物的影响  

The influence of different deoxidization process on the inclusions in SG45VCM steel

作　　者：战东平[1] 邱国兴[1] 张炎杰[1] 牛奔[1] 姜周华[1] 张慧书[2] 

机构地区：[1]东北大学冶金学院,辽宁沈阳110004 [2]辽宁科技学院冶金工程学院,辽宁本溪117004

出　　处：《炼钢》2016年第2期48-52,共5页Steelmaking

基　　金：国家自然科学基金资助项目(51574063);国家863项目(2012AA03A503);辽宁省高等学校优秀人才支持计划(LJQ2015056);中央高校基本科研业务费(N150204012)

摘　　要：为解决钢厂生产SG45VCM钢时常出现的因脱氧工艺不合理造成的Al2O3夹杂物聚集堵塞水口问题,通过热力学计算及试验,研究不同脱氧工艺对钢中非金属夹杂物的影响。热力学计算表明:铝和钛脱氧均可使钢中溶解氧降至较低的水平,铝和钛的脱氧能力远大于硅和锰。2种脱氧工艺终点钢中全氧质量分数相差不大,最低降至7×10-6。新脱氧工艺所形成的夹杂物尺寸较小,各种类夹杂物数量相当,且在钢中分布均匀,可避免原脱氧工艺所形成的纯Al2O3夹杂造成的水口结瘤现象,同时结果表明,钢中铝的存在不利于钛氧化物的形成,钢中钛的存在可以使夹杂物呈均匀弥散分布。In order to eliminate clogging of nozzle that caused by the the accumulation of Al2O3 which was generated in the irrational process of deoxygenation during concasting SG45VCM steel, research on the influence of different deoxidization processes on non-metallic inclusions in steel was studied, through thermodynamic calculation and experiments. Thermodynamic calculation shows that deoxidization by using aluminum and titanium can get low dissolved oxygen level, deoxidization ability of aluminum and titanium is better than that of silicon and manganese. At the end of two kinds of deoxidization process the oxygen mass fraction in steel were similar, the lowest was 7 × 10^-6. Size of inclusions in the new deoxidization process was small. There were various types of inclusions, and they were distributed evenly in the steel. Phenomenon of clogging of nozzle caused by the pure Al2O3 which was generated in the original process of deoxygenation could be avoided. The experiment results show that the presence of aluminum in steel can against the formation of titanium oxide, and the inclusion distribution is uniform dispersion.

关 键 词：炼钢 脱氧合金化 氧质量分数 夹杂物 优化 

分 类 号：TF142.1[冶金工程—冶金物理化学]