IF钢生产过程夹杂物的演变及控制研究

来源 :第五届宝钢学术年会 | 被引量 : 0次 | 上传用户:siery
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采用SEM+EDS试验分析了IF钢冶炼过程中不同阶段钢水夹杂物的形貌和类型,对比了水口絮瘤物与中间包钢水夹杂物的类型情况.研究结果表明:炉后大包钢水中夹杂物一般为球状或块状Mn-Fe-O复合夹杂物,RH铝脱氧后夹杂物演变成树枝状的Al2O3夹杂物,没有发现Mn-Fe-O复合夹杂物,钢水中加入钛铁后,夹杂物包括Al2O3系和Al2O3-TiO2系复合夹杂物,Al2O3系和Al2O3-TiO2系复合夹杂物为IF钢的主要内生夹杂物;此外,钢水中还存在少量来自于耐材侵蚀的块状Al-Mg-Si-O复合夹杂物.降低冶炼过程中Al2O3系和Al2O3-TiO2系内生夹杂物的生成量,避免Al-Mg-Si-O系外生复合夹杂物是提高钢水洁净度、改善钢水可浇性的主要措施。
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