Fe-Cr-Ni 系鉄高濃度領域における液相面および固相面の計算

概要

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The liquidus and solidus surfaces of iron-rich corner of Fe-Cr-Ni system was calculated. The purpose of this calculation was to reproduce sufficiently accurate informations concerning solidification process, such as liquidus and solidus temperatures, tie-lines, peritectic-eutectic line. The Gibbs energy of the system was expressed by use of the extended regular solution model, and the necessary thermodynamical parameters were evaluated by the least square method, to fit experimental phase diagrams and published thermodynamic values. Evaluation for binary system concerning of ternary system was conducted with great attention, because binary parameters play critical role on the tie-lines of ternary system. Precise fitting on the limited area was made to avoid the number of parameters having low physical meaning to increase. The calculated liquidus and solidus surfaces showed a good agreement with experimental ones, concerning to the purpose cited above. The validity of this phase diagram was confirmed by applicating the same method to other published phase diagram.
社団法人日本鉄鋼協会の論文
1990-12-01