METHOD FOR DOUBLE DISLOCATION ALLOYING AND NANOPHASE MODIFICATION OF STEEL BY ATOMIC NITROGEN

摘要

A new technology of intense double alloying and modification involves introduction, during the process of secondary treatment of steel, of nitrogen-containing substance in urea (NH₂)₂CO into a ladle with a steel melt, which at a temperature of the steel liquid phase of approximately 1650° C. dissociates in an explosive manner, releasing atomic nitrogen. Conversion or transformation of an explosive dissociation of urea into an intensive process of self-propagating synthesis of nitride nanophases is carried out using differentiated by the amount and time schemes of the input of urea into steel melt, wherein the basic parameters, depending on the type of steel, are the flow rate of urea per tonne of steel in the range of 0.4-1.8 kg/tonne and speed of its input into the melt in the range of 5.0-8.0 kg per minute.