TY JOUR TI STUDYING THE INFLUENCE OF THE DEVELOPED ACTIVATING FLUXES ON WELDING ARC IONIZATION AND DEPTH PENETRATION OF 09G2S STEEL BY USING A-TIG TECHNOLOGY KW flux KW depth KW penetration KW steel KW surfacing KW paste KW fluorspar KW macrostructure JO Transport engineering AU Ukrainchev, A.L. AU Tereschenko, A.A. AU Makarenko, K.V. PY 2026 IS 2026 PB Bryansk State Technical University