TY CONF TI HARDENING OF THE SURFACE LAYER OF RODS HYDRAULIC CYLINDERS FOR MINING EQUIPMENT ELECTROSPARK ALLOYING KW operational properties KW surface plastic deformation KW electric spark alloying KW surface layer hardening KW technological heredity JO Ensuring and improving the quality of engineering and aerospace products AU Korotin, V.O. PY 2024 PB Bryansk State Technical University