新ガス成分 C_2N_2O の利用に關する研究 (I) : 都市ガスを用いる場合の鋼の表面硬化

概要

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A more powerful and simplified method of case hardening as well as of bright annealing by the use of town-gas has been proposed. The method was to make the case hardening power of modified town gas more effective by utilizing the cyanide salts and the oxidizing constituents in a closed vessel. A new gaseous constituent C_2 N_2 O was theoretically estimated to be its important one, being illustrated by comprehensive experiments. Steels wese oxidized by heating in the atmosphere of town-gas, but were bright-annealed or casehardend by addition of the K_4Fe (CN)_6 over 0.5gr per litre town-gas. Carbonitriding power became maximum at Sgr. K_4Fe (NC)_6 per litre town-gas, and was reduced by addition over it, the reason being that the concentration of C_2N_2O gas, having vital effect in case hardening, became maximum at 3gr./lr.
社団法人日本鉄鋼協会の論文
1953-12-25