BUILDING OF ALLOYED SURFACE LAYER DURING ELECTRIC SPARK TREATMENT OF STEEL 35 BY THE RHENIUM

Abstract

The results of the study of the effect of the composition and structure of the alloyed layer on the surface of steel 35 during electric spark alloying using rhenium anode material were shown. (Research purpose) The research purpose is investigating the effect of the electric spark alloying of steel with rhenium on the composition and structure of the alloyed layer. (Materials and methods). Rhenium Re (99.99 percent) was used as the anode material, steel 35 was used as the cathode. As equipment - BIG-1, Elitron-22-AM with AG-2 unit, IMEIL installation; SEM EVO-50 XVP "S.ZEISS", RigakuMiniFlex-II diffractometer (Japan), Cu-Ka radiation, ICDD database; VLO-200, VLR-220 scales; PMT-3M microhardometer. The samples were cleaned in an ultrasonic bath. (Results and discussion) The composition and structure of the alloyed layer were investigated. The change in the elemental content of the alloyed layer in depth showed a high Re content near the outer surface of the alloyed layer and at a depth of up to 10-15 micrometers, which rapidly decreased with an increase in depth to 27-30 micrometers in the opposite phase to Fe. It was determined that the formation of the obtained phases in the melt microvanna was accompanied by high temperatures during electric mass transfer. (Conclusions) The results of the study of the effect of the modes of electric spark alloying of 35 rhenium steel on the phase composition and efficiency were shown. They proposed an energy indicator, gave its assessment in comparison with others. It is of interest to continue the study of electrospray doping with rhenium, to clarify the modes that increase efficiency.