γ型 Fe-Co-Cr-Ni 基耐熱合金に現われる新二次相について : γ型耐熱合金の焼戻過程に関する研究 VI

概要

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An unknown phase, which had been detected in the aged LCN-155 type alloys and temporarily designated as "X", was examined and discussions were made on the cor-relation with the additional elements such as C, N, Mo, W and Cb, the precipitate reaction in alloy during aging, the X-ray diffraction pattern, the lattice parameter, the specific gravity, and the chemical composition. As the results, it was concluded that an unknown phase in the LCN-155 type alloys should be the new secondary phase unlike the well-known phases such as M_23C_6, M_6C and η′ phase. Further, a model of crystal structure was presented for the new phase. It was presumed that this phase, which was newly named as "π", might be the carbo-nitride compound having the following crystal structure : Symmetry……Cubic Space group……Fd3c Unit cell dimension……a_0=10.70-10.75Å Number of atoms per unit cell……104 Chemical formula……M_<11>(C, N)_2 (Cr, Co, Ni, Fe)_8(Mo, W)_3-(C, N)_2 in the LCN-155 type alloy.
社団法人日本鉄鋼協会の論文
1962-07-01