Chunyayev O. Mass transfer during chemo-thermal treatment of ferro-carbon alloys with use of chloride activators in chamber furnaces

Object of study: mass transfer processes that takes place during diffusion carbide surface alloying (DCSA) of ferrocarbon alloys in the powdered saturating mixtures of carbide formers, or their ferroalloys, alumina and ammonium chloride. Purpose of study: research of mass transfer mechanism during DCSA and technological development of this process for industrial use. Methods of study: atomic absorptive spectrometry, scanning electron microscopy, X-ray spectrum analysis. Theoretical, practical and actual value: the role of impurities and by-pass reactions on kinetics and results of alloying are defined. The mass transfer mechanism that takes place during DCSA is determined. The new method of mixture correction is developed. The limitation stages of the process are defined. The regiments of chemo-thermal treatment are improved, the new energy-saving thermal equipment and semi-continuous DCSA technological line are developed. Degree of application: applied in Himmashservice in Cumy. Sphere of application:chemical machine building plants.