Разработка и исследование высокопрочных быстрорежущих сталей на основе диспергированных электроэрозией частиц сплава Р6М5

Abstract

The purpose of this study was to conduct metallographic studies of high-strength high-speed steels based on elec-troerosion dispersed particles of alloy R6M5. Methods. Electrodispersion of the R6M5 alloy waste was carried out in a metal waste disperser patented by the authors (RF Patent No. 2449859). Lighting kerosene was used as the working fluid. The fusion of the electroerosion charge was carried out in the spark plasma fusion system SPS 25-10 "Thermal Technology" (USA). The tasks set in the work were solved using modern equipment and complementary methods of physical materials science, including: the elemental composition of high-speed steels was studied on an energy dispersive X-ray analyzer of the company "EDAX" (Netherlands), embedded in a scanning electron microscope "QUANTA 200 3D" (Netherlands); the phase composition of high-speed steels was studied on an X-ray diffractometer "Rigaku Ultima IV" (Japan); The microstructure of the alloys was studied using an electron-ion scanning (scanning) microscope with field emission of electrons "QUANTA 600 FEG" (Netherlands). Results. It has been experimentally established that high-speed steels made of electroerosion dispersed waste particles of alloy P6M5 have the following characteristics: fine-grained structure without pores, cracks and discontinuities; the main elements are Fe, W, Cr, Mo and C; the main phases are Fe3C, Mo2C, Fe, W, Cr. Conclusion. A complex of metallographic studies of new high-speed steels produced by spark plasma fusion of powders obtained by electroerosive dispersion of alloy R6M5 waste in kerosene has shown high efficiency of using spark plasma fusion technology to provide high mechanical properties to high-speed steels from electroerosion dispersed particles of alloy R6M5 waste.