<報文>溶融鉄-クロム, 鉄-バナジウム系合金の酸素の活量について

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The equilibrium of gaseous H_2-H_2O mixture with liquid iron, iron-chromium alloys or iron-vanadium alloys contained in alumina crucibles was studied. The results obtained are summarized as follows : 1) The equilibrium constant for the reaction H_2 (g)+O (in liquid iron)=H_2O (g) is given by log K (p_<H_2O>/p_<H_2>・a)=7,710/T-3.580,and oxygen in liquid iron obeys Henry's law under the present experimental conditions that are taken in the temperature range from 1,550 to 1,650℃ and at p_<H_2O>/p_<H_2> below 0.357. 2) The effect of chromium on the activity coefficient of oxygen in liquid iron diminishes with the increase in chromium content. The interaction parameters of the chromium and oxygen at 1,610℃ were obtained as follows [numerical formula] [numerical formula] 3) The interaction parameters of vanadium and oxygen at 1,610℃ were obtained as follows : [numerical formula] [numerical formula]
1968-03-20