The Effect of Deformation in the Two-Phase Region of C-Mn and Microalloyed Steels on the Mechanical Behaviour of the Resulting Structure

The paper presents results of experimental research and a model implementation of hot deformation process in the two-phase region for microalloyed and plain carbon steels. Hot compression tests were employed to determin the behavior of deformed steel over a range of strain rates (1x10-3 - 2,5x103 s-1) and temperatures (650 - 1050 °C). The hot deformation conditions during the test were simulated using Finite Element Method. The thermomechanical history of the material is consequently integrated in the simulation. The investigation was focused on the case when the last deformation takes place in the two phase or ferrite region. Such deformed material was investigated to obtain the microstnicture development and its influence for mechanical properties in final product