Determination of the Diffusion Parameters of Chromium during the Vacuum Chromizing of Low-Carbon Steel

摘要

Armco iron was subjected to Cr vapor in a vacuum furnace in the temperature range 1100 to 1830C for 1 to 40 hours. Specimens were removed from the furnace and subjected to electron probe microanalysis to determine Cr distribution. The diffusion of Cr in the alpha and gamma phases of Fe was found to obey an Arrhenius relationship in the temperature region investigated. Parameters of the equations are tabulated in the results.