The mathematical model of spheroidization of pearlitic structures should be based on the physics of this process - the transition from lamellar pearlite to spheroidized. The following parameters of the initial microstructure with lamellar pearlite should serve as input data for the model: structural composition (volume fractions of pearlite and ferrite), ferrite grain size and interplate distance in pearlitic colonies. The developed model should predict the kinetic curve of transition from lamellar morphology of pearlite to spheroidized morphology depending on the temperature regime of annealing and the final characteristic size of spheroidized cementite. In accordance with the kinetics of the pearlite spheroidization process, approaches should be proposed and implemented to assess the change in mechanical properties (yield strength, tensile strength and elongation) during annealing. Verification of models using both experimental data provided by the Customer and using data from the Contractor. The experimental base is the data on changes in the mechanical properties of the studied steels during annealing.

The mathematical model of spheroidization of pearlitic structures should be based on the physics of this process - the transition from lamellar pearlite to spheroidized. The following parameters of the initial microstructure with lamellar pearlite should serve as input data for the model: structural composition (volume fractions of pearlite and ferrite), ferrite grain size and interplate distance in pearlitic colonies. The developed model should predict the kinetic curve of transition from lamellar morphology of pearlite to spheroidized morphology depending on the temperature regime of annealing and the final characteristic size of spheroidized cementite. In accordance with the kinetics of the pearlite spheroidization process, approaches should be proposed and implemented to assess the change in mechanical properties (yield strength, tensile strength and elongation) during annealing. Verification of models using both experimental data provided by the Customer and using data from the Contractor. The experimental base is the data on changes in the mechanical properties of the studied steels during annealing