抄録
The purpose of this investigation is to study the variation of total oxygen content in molten iron deoxidized by Ti, and Ti-Si, Ti-Mn and Ti-Si-Mn alloys as well as to observe the morphology of the deoxidation products.
The results obtained are summarized as follows:
(1) Titanium deoxidation: With less than 0.12% Ti addition, molten FeO-TiO2 binary droplets were formed. With more than 0.15% Ti, titanium oxide with high melting point precipitated as deoxidation product. In the latter case the deoxidation rate and limit were satisfactory.
(2) Ti-Si deoxidation: The products have the similar morphology to that in the case (1) but their sizes were considerably larger. The very low Si content in the products was found. The deoxidation rate and limit were slightly worse than those in the titanium deoxidation.
(3) Ti-Mn deoxidation: The products seemed to be liquid complex oxides containing Ti and Mn. They were very large and perfectly spherical. The deoxidation rate and limit were deteriorated.
(4) Ti-Si-Mn deoxidation: The products consisted of titanium, manganese and silicon oxides. Their Si contents were as low as that in the Ti-Si deoxidation. The deoxidation rate and limit were superior to those in the case (3) and inferior to those in the case (2).
