Актуальные проблемы в машиностроении Том 4 №1 2017

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Актуальные проблемы в машиностроении. Том 4. № 1. 2017 Материаловедение
в машиностроении
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INCREASE OF STEEL SURFACE PROPERTIES OF SURFACING AND FOLLOWING
ELECTRON BEAM TREATMENT
Kormyshev V.E.1, Engineer, е-mail:
Gromov V.E. 1, . (Physics and Mathematics), Professor, е-mail:
Ivanov Yu.F. 2, 3, . (Physics and Mathematics), Professor, Chief Researcher,
е-mail:
Bataev V.A.4, (Engineering), Professor, е-mail:
Kondratova O.A.1, Ph.D. (Physics and Mathematics), Associate Professor,
е-mail:
Nikitina E.N.1, Ph.D. (Engineering), е-mail:
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 В4С 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