熔融純鉄中の窒素の活量

概要

論文の詳細を見る
An experimental study was made on the equilibrium of liquid pure iron and the controlled atmosphere of N_2-A mixture or N_2 only in the range of nitrogen pressure up to 2.3 atm., in the temperature range of 1566℃ to 1740℃, and the following results were obtained : (1) The solubility of nitrogen in liquid pure iron does not obey the Sieverts' law, and the nitrogen-solubility deviates positively from this law. (2) The equilibrium constant and the free energy change in the reaction which nitrogen dissolves in liquid iron are represented by the following equations : log K_N=-815/T-0.819 ΔF°=3, 730+3.75T (3) The activity coefficient of nitrogen in liquid pure iron is represented by the following equation ; log f^N_N=1.97%N__- This equation is blieved to be independent of temperature over the range 1566℃ to 1740℃, at least in the range 0∿0.070% nitrogen.
社団法人日本鉄鋼協会の論文
1959-02-10