SIMULATION OF PROCESSES OF HEAT EXCHANGE AND OF ENERGY INTERCHANGE IN INDUCTION PULSE HARDENING OF STEEL

There the study object is the surface layer of articles in carbon steels, which are subject to heating with the strong induction pulse with following self-hardening. The physico-mathematical simulator, which describes the processes of non-stationary heat exchange in the surface layer in heating with the square induction pulse, the processes of decay of initial structure of hypoeutectoid steel and of formation of two-phase field in the temperature interval up to the liquidus point of steel, has been developed. The results of numerical simulation allowed to determine the holding periods of different points of surface layer more than the critical temperatures, to predict the average size of grain of surface to be hardened in the wide span of pulse durations and of its specific power. The data of numerical simulation of dynamics of heating - cooling were used in optimization of process of induction pulse hardening of steel parts; it allowed to increase the strength and life characteristics of these parts several times. The study results may be applied in the material science and the machine-buildingAvailable from VNTIC / VNTIC - Scientific & Technical Information Centre of RussiaSIGLERURussian Federatio