The silicon-aluminum deoxidization and calcium treatment of titanium bearing ultra-pure ferritic stainless steel
- 作者：LI GuangqiangYUAN GangLI YongjunCHEN Zhaoping
- 会议时间：2013-06-01
- 关键词：ultra-pure ferritic stainless steel ; silicon-aluminum deoxidization ; inclusions ; calcium treatment
- 作者单位：LI Guangqiang,YUAN Gang,LI Yongjun(Key Lab. Ferrous Metall. & Resources Utilization,Ministry of Education,Wuhan Univ. Sci. & Technol.,Wuhan 430081,Hubei,China)CHEN Zhaoping(Research Institute,Baoshan Iron & Steel Co.,Ltd.,Shanghai 201900,China)
- 母体文献：第五届宝钢学术年会论文集
- 会议名称：第五届宝钢学术年会
- 会议地点：上海
- 主办单位：中国金属学会
- 语种：chi
摘要
The refining process of ultra-pure ferritic stainless steels was studied in laboratory.The effects of Fe-Si-Al alloy with different Si/Al ratio on deoxidation process and the typical inclusions after deoxidization,titanium alloying and calcium treatment processes were investigated.The forming conditions of the typical inclusions were also analyzed by thermodynamic calculation.The results show that the contents of dissolved aluminum and total oxygen deoxidized by pure aluminum were similar to that of deoxidized by Fe-Si-Al alloy.The main oxide inclusions were ( MgO) -Al2O3-SiO2 after deoxidation by silicon-aluminum complex deoxidizer.After titanium alloying,the inclusions turn to Al2O3-MgO-( SiO2 ) -TiOx complex and TiN.After calcium treatment,the typical inclusions were MgO-Al2O3-CaO-SiO2-TiOx spherical type complex ones.The amount and total area of inclusions and average particle diameters decreased with deoxidation by Fe-Si-Al alloy than pure aluminum.The effect of calcium treatment and titanium alloying sequence on the composition,morphology,and size distribution of inclusions are discussed.