Cr-Mo-V 熱間工具鋼中の炭化物について : 実用特殊鋼中の炭化物の電解分離による研究 X

概要

論文の詳細を見る
Chemical and X-ray analyses were carried out on carbides, isolated electrolytically from the as-annealed, as-quenched and as-tempered structures of chromium-base hot-working tool steels. Carbides found in the as-annealed structures are M_<23>C_6, M_6C and MC, similarly to the carbides in tungsten-base hot-working tool steels. M_7C_3 and ξ carbide expected from the equilibrium diagrams for Fe-C-Cr and Fe-C-Mo systems were not observed in the as-annealed structures. Carbide reactions during tempering are complicated, but are regarded as the combination of four sequences, which proceed separately in chromium, molybdenum, vana-dium and tungsten steels ; that is (i) M_3C→M_7C_3→M_<23>C_6, (ii) M_3C→Mo_2C→M_6C, (iii) M_3C→MC, and (iv) M_3C→W_2C→M_6C+M_<23>C_6. The rate of the carbide reactions taking place towards equilibrium during tempering were very slow, owing to the low mobility of molybdenum atoms.
社団法人日本鉄鋼協会の論文
1960-11-01