δ-鉄の酸素溶解度におよぼす第三元素の影響
1969 年 55 巻 13 号 p. 1193-1198
詳細
1969 年 55 巻 13 号 p. 1193-1198
Non metallic inclusions change their composition in solid iron during annealing at high temperatures.Therefore, it is desirable to know the effects of the alloying elements on the oxygen in solid iron. This experimentwas carried out to know the effect of the alloying elements on the solubility of the oxygen and to determinethe interaction coefficients of oxygen in δ-iron. The crucible assembly was lowered very slowly underpurified argon gas in Tamman furnace and the equilibrium between solid iron and liquid was observed.The relation of the distribution ratio of oxygen in Fe-O system (Lo′) and in Fe-O-X system (Lo) is
log Lo=log Lo′+log f(X)l/f(X)S
where f(X)S and f(X)lare the interaction coefficients in solid and liquid iron respectively. By using the relation, we can get the interaction coefficients in solid iron. These results are as follows:
log f(Mn)S=-1.83 [% Mn] <0.15%
log f(Cr)S=-0.23 [% Cr] <0.5%
log f(Si)S=-12.14 [% Si] <0.1%
log f(V)S=-1.71 [% V] <0.3%
log f(Ni)S=-0.105 [% Ni] <1.0%
