TY JOUR TI WEAR RESISTANCE CARBIDE INSERTS WITH MULTI LAYER COATINGS IN VARIOUS TECHNOLOGICAL CONDITIONS TURNING HEAT-RESISTANT STEEL KW empirical model of wear resistance KW turning corrosion-resistant heat-resistant steel KW firmness of hard alloy tool KW experiment planning KW results of micro-study of cutting inserts JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Pchelkin, V.M. AU Duyun, T.A. PY 2018 IS 3 PB Belgorod State Technological University named after V.G. Shukhov