PHYSICO-CHEMICAL EFFECTS PROVOKED IN THE PIECE SURFACES DURING MACHINING BY APPLYING ELECTRICAL DISCHARGES IN IMPULSE

The work presents an analysis of the results of experimental investigations on physico-chemical effects which are produced in the piece surfaces machined by applying electrical discharges in impulse (EDI). It analyzes the process of priming pulsed electric discharges, accompanied by processes of gas ionization and the electronic emissions of particulate metal powders It demonstrates that the ionization process and restore the active resistance of the gap is a function of battery voltage capacitor pulse power generator.It is stated that EDI cause micro metallurgical phenomena, diffusion effects, chemical and structural modification of the machined surface composition and of its micro geometry. All this contributes to increasing the hardness, active surface and absorption properties of different types of radiation.