Actual Problems in Machine Building 2017 Vol. 4 No. 1

Актуальные проблемы в машиностроении . Том 4. № 1. 2017 Материаловедение в машиностроении ____________________________________________________________________ 125 INCREASE OF STEEL SURFACE PROPERTIES OF SURFACING AND FOLLOWING ELECTRON BEAM TREATMENT Kormyshev V.E. 1 , Engineer, е-mail: kormyshev_v@mail.ru Gromov V.E. 1 , D.Sc. (Physics and Mathematics), Professor, е-mail: gromov@physics.sibsiu.ru Ivanov Yu.F . 2, 3 , D.Sc. (Physics and Mathematics), Professor, Chief Researcher, е-mail: yufi55@mail.ru Bataev V.A. 4 , D.Sc. (Engineering), Professor, е-mail: vabataev@yandex.ru Kondratova O.A. 1 , Ph.D. (Physics and Mathematics), Associate Professor, е-mail: okondratova@mail.ru Nikitina E.N. 1 , Ph.D. (Engineering), е-mail: nikitina@sibsiu.ru 1 Siberian State Industrial University, 42 Kirov st., Novokuznetsk, 654007, Russian Federation 2 National Research Tomsk Polytechnic University, 30 Lenin Avenue, Tomsk, 634050, Russian Federation 3 Institute of High Current Electronics, Siberian Branch, Russian Academy of Sciences, 2/3 Akademichesky Avenue, Tomsk, 634055, Russian Federation 4 Novosibirsk State Technical University, 20 Prospect K. Marksa, Novosibirsk, 630073, Russian Federation Abstract Using the methods of modern material science the structure, phase composition, defect substructure, microhardness and tribology properties of coating formed on martensite low carbon Hardox 450 steel by electroarc surfacing of Fe-C-N-B powder wire and modified by the following irradiation of high intensive pulse electron beams are investigated. The formation of multiphase state of surfaced layer is revealed. It characterizes by the of large amount of iron borides inclusions, the hardness of whisk’s 10 times more that the hardness of Hardox 450 steel. The surfaced layer, modified by intensive impulse electron beams is multiphase aggregate with solid solution on the α -Fe base iron boride FeB and boron carbide В 4 С main phases. The increase of wear resistance of surfaced layer modified by intensive impulse electron beams in more than 20 times relatively to wear resistance of steel and in more than 11 times relatively to the surfaced layer without electron beam treatment is revealed. The friction coefficient of surfaced layer irradiated by electron beams is decreased essentially. For the initial steel it equals to 0,31; for surfaced layer – 0,14; for surfaced layer after electron beam treatment – 0,09. Keywords wear resistance, microhardness, structure, phase composition, surfacing, electron beam treatment