Nitriding of Medium Carbon Ferromanganese Alloy in Gas Solid Reaction

Saeed N. Ghali

Central Metallurgical Research & Development Institute, CMRDI P. O. Box 87 Helwan, Egypt.

DOI: 10.4236/jmmce.2011.104022                

Abstract

Nitriding process of medium carbon ferromanganese was carried out in the solid state, on lab and bench scale at temperature range 1023-1323 K using different nitrogen and hydrogen pressures. The influence of H₂/N₂ gas ratio, temperature and time on nitriding process of fine (-2 mm) medium carbon ferromanganese were investigated. Nitrogen content, in weight percent ranging from 2.1 to 9.7 could be obtained. The optimum temperature and time of nitriding process was found to be 1223 K and 21.6 ks respectively. The results showed that nitrogen content is mainly depending on time and temperature of nitriding process. The comparison between results of lab and bench scale, at optimum conditions, showed good coincidence. At optimum conditions; 1223 K, 21.6 ks and at 2/8 of H₂/N₂, nitrogen content of fine medium carbon ferromanganese was 9.5%.

Keywords

Nitriding, Gas Solid Reaction

Conflicts of Interest

The authors declare no conflicts of interest.

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