MODELLING OF THERMO DEFORMATION CYCLES TAKING INTO ACCOUNT PHASE TRANSFORMATIONS AND CHARACTER OF PROGRESS WITH TIME STRESS IN TEMPERED STEELS UNDER LOCAL HEATING

M.L. Volovodyuk, L.P. Kravchenko

Character of progress with time in tempered steels under local heating is observed and the kinetics of structural transformations in areas of high heat-affected zone is studied on a steel instance 20HN3М which is widely applied to improve the reliability and durability of parts and assemblies of internal combustion engines. With use of methods of modeling of thermo deformation cycles in timbered test specimens complex impact of physical parameters on progress of an elastic-plastic straining of metal at local heating is investigated that can theoretically determine the parameters of the process to ensure the required quality and reliability of parts.

Key words: a thermo deformation cycle, a zone of thermal influence, progress with time stress, elastic-plastic straining, kinetics of structural transformations, heat-affected zone.