%0 Journal Article %T MATERIALS SCIENCE RESEARCH OF TOOL JOINTS OF DRILL PIPES WELDED BY DIFFERENT FLUXES %A Pugacheva, T.M. %A Miheev, D.A. %K tool joint, drill pipe, welded, chemical composition, microstructure, properties, flux %J Bulletin of Belgorod State Technological University named after. V. G. Shukhov %D 2018 %N 3 %P 5 %I Belgorod State Technological University named after V.G. Shukhov