THERMAL-STABILITY OF THE DISLOCATIONAL STRUCTURE OF COLD-DEFORMED STEEL

The influence of the initial structure, degree of deformation, and tem perature on the processes occurring in postdeformational heating is in vestigated for the example of 18KhGT steel, A relation is established between the character of these processes and the thermal stability of substructural strengthening in repeated heating at subcritical tempera tures. The weakening kinetics and the evolution of the dislocational s tructure of steel in various substructural states are investigated, Th e conditions of increase in thermal stability of the deformational str engthening are determined, as well as the processes limiting this stab ility.