製鋼温度におけるTi_2O_3-CaO-Al_2O_3系酸化物状態図の決定(高温プロセス基盤技術)

概要

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In order to make the basis of oxide inclusion study containing titanium in the calcium treated steel, Ti_2O_3-CaO-Al_2O_3 phase diagram was investigated by diffusion couple experiments and high temperature equilibrium experiments. Ti_2O_3-CaO-Al_2O_3 phase diagram has been determined at 1600℃ and 1550℃, under P_<O_2>=10^<-14>-10^<-15> atm, which corresponds to dissolved oxygen content in deoxidized molten steel. In this system, liquid phase region, possibly forming plastic spherical inclusion, becomes narrower when Ti_2O_3 content is more than approximately 20 wt%. This region is also notably diminished when the temperature drops from 1600 to 1550℃. The reliability of the results measured in this work was confirmed by a good agreement of liquidus line and solid solubility with previous works.
社団法人日本鉄鋼協会の論文
2005-04-01