The effect of Thermomechanical Processing, using cold deformation with the combination of post deformation annealing and induction hardening based on the of dislocation structure inheritance effect on the strength, ductility, and torsion static strength has been studied. The metal with an initial structure of lamellar pearlite has shown to be more advantageous with respect to the strengthening intensity during cold rolling and the combination of mechanical properties after the TMP. It can be seen that in the studied strain range (up to εΣ ≅ 60 %) the hardness of the high-strength middle carbon steel with the structure of lamellar pearlite is 20 – 40 % higher than that of the steel with the structure of granular pearlite. Steel with the initial structure of lamellar pearlite is strengthened more intensely and its final heat treatment with the use of induction hardening to martensite and low temperature tempering show the inheritance of fragmented dislocation substructure result in the highest static torsion strength and the best combination of other mechanical properties.Keywords: Thermomechanical strengthening, cold deformation, dislocation substructure, middle carbon low, alloyed steels
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