3.25% 珪素鋼中の Se の固溶度について

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The solubility of selenium in Fe-3.25% silicon alloy was determined by equilibrating the alloy with a gaseous mixture of H_2 and H_2Se. The composition of the gas mixture, (P_<H_2Se>/P_<H_2>), was controlled by adjusting the temperature of the following reaction : FeSe (s or 1)+H_2(g)⇆Fe(s)+H_2Se(g) The results obtained are as follows : 1) The solidus and the liquidus temperature of FeSe were found to be 1270° and 1318°K, respectively. Equilibrium constant, K=P_<H_2Se>/P_<H_2>, was determined to be log K=-3760/T+0.15 (T<1270°K) log K=-2200/T+0.53 (1318°K<T) 2) In the absence of manganese, the solubility of selenium was found to be 0.016% (in wt%) at 1200℃, 0.022% at 1250℃ and 0.061% at 1300℃. In the presence of 0.05% manganese the solubility of selenium was found to be 0.014% at 1200℃, 0.017% at 1250℃ and 0.041% at 1300℃. In the presence of 0.10% manganese the selenium solubility was 0.011% at 1200℃, 0.015% at 1250℃ and 0.030% at 1300℃. 3) The solubility product of manganese and selenium was found to be strongly dependent on manganese content in the range of manganese levels measured.
社団法人日本鉄鋼協会の論文
1977-01-01