3Xinhua Wang, Kewen Zhao, Haibo Li, et al. Composition change of the non-metallic inclusions during the secondary refining of low oxygen alloyed structural steels[C]//AIST Proceedings, St. Louis. , USA, 2009:965-972.
4G J W Kor. Calcium treatment of steels for castability [C]//. First International Caleiun Treatment Symposium, Glasgow, Scotland, The Institute of Metals, 1998: 39-44.
5C H Chang, I H Jung, S C Park, et al. Effect of Mg on the evolution of non-metallic inclusions in Mn, Si, Ti deoxidised steel during solidification experiments and thermodynamic caleulation[J]. Ironmaking and Steelmaking, 2005, 32(3): 251-257.
