Analysis of the evolution of the fine structure of secondary-hardening stee
l in tempering makes it possible to understand the nature of processes that
cause changes in the strength and ductility. They are connected with the c
hanges that occur in the solid solution, the ensemble of disperse segregati
ons of the carbide phase, and the dislocation structure of martensite. Thes
e transformations are interrelated, and their specific features are determi
ned by the chemical composition of the steel.