TY JOUR TI RATIONAL COMPOSITION OF REFRACTORY COMPONENTS OF WELDING WIRE TO ENSURE WEAR RESISTANCE OF WORKING SURFACES OF PARTS KW flux-cored wire KW regression model KW machinability KW machining KW boron nitride KW tungsten carbide KW tungsten KW electric arc welding KW wear rate KW hardness JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Novotochinov, A.P. AU Vladimirov, A.A. PY 2025 IS 10 PB Belgorod State Technological University named after V.G. Shukhov