The silicon-aluminum deoxidization and calcium treatment of titanium bearing ultra-pure ferritic stainless steel
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.
ultra-pure ferritic stainless steel silicon-aluminum deoxidization inclusions calcium treatment
LI Guangqiang YUAN Gang LI Yongjun CHEN Zhaoping
Key Lab. Ferrous Metall. & Resources Utilization,Ministry of Education,Wuhan Univ. Sci. & Technol.,W Research Institute,Baoshan Iron & Steel Co.,Ltd.,Shanghai 201900,China
国内会议
上海
英文
1-6
2013-06-01（万方平台首次上网日期，不代表论文的发表时间）