TY JOUR TI HETEROGENEOUS HARDENING OF MACHINES PARTS BY SURFACE PLASTIC DEFORMATION KW heterogeneous hardening KW surface plastic deformation KW fatigue strength KW simulation KW finite elements KW mining and metallurgical machinery KW quality JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Afonin, A.N. AU Martynov, E.M. AU Makarov, A.V. PY 2019 IS 4 PB Belgorod State Technological University named after V.G. Shukhov