製鋼温度におけるTi2O3-CaO-Al2O3系酸化物状態図の決定
2005 年 91 巻 4 号 p. 376-382
詳細
2005 年 91 巻 4 号 p. 376-382
In order to make the basis of oxide inclusion study containing titanium in the calcium treated steel, Ti2O3-CaO-Al2O3 phase diagram was investigated by diffusion couple experiments and high temperature equilibrium experiments. Ti2O3-CaO-Al2O3 phase diagram has been determined at 1600°C and 1550°C, under PO2=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 Ti2O3 content is more than approximately 20 wt%. This region is also notably diminished when the temperature drops from 1600 to 1550°C. The reliability of the results measured in this work was confirmed by a good agreement of liquidus line and solid solubility with previous works.
