Conditions of preparation of chromized iron powder by the method of diffusional impregnation from solid chromium-containing packing materials (Part 2)

Summary

• 1. The influence of chromizing temperature and packing material composition on the composition of chromized powder and the coefficient of utilization of chromizing mixture was determined at a constant holding period, constant volume ratio of the powder being chromized and the chromizing material, and constant loosener content of the powder.

• 2. On the basis of the relationships discovered, it was established that powders of a given composition may be prepared under different chromizing conditions. In this connection, a method was indicated of selecting the optimum parameters, at which the maximum coefficient of utilization of the chromium contained in the mixture is attained.

• 3. To obtain the optimum combination of process parameters, chromizing should be performed at high temperatures (1373°K), using packing materials with low chromium contents.