Actual Problems in Machine Building 2018 Vol. 5 No. 3-4

Актуальные проблемы в машиностроении. Том 5. № 3-4. 2018 Материаловедение в машиностроении ____________________________________________________________________ 117 INCREASE OF THE COMPLEX OF OPERATING PROPERTIES OF TITANIUM ALLOYS BY SYNTHESIS OF CARBIDE AND BORIDE PARTICLES IN COATINGS Chuchkova L.V., Post-graduate Student, e-mail: L_Chuchkova@bk.ru Belov A.S., Student, e-mail: Al_belov98@mail.ru Vasilieva V.S., Student, e-mail: wera.wasiljewa@yandex.ru Vyalova A.D., Student, e-mail: nastya13-29.98@mail.ru Novosibirsk State Technical University, 20 Prospekt K. Marksa, Novosibirsk, 630073, Russian Federation Abstract In this paper, studies of modified layers formed on a titanium alloy during surfacing of boron carbide powder are presented. At high temperature exposure and subsequent crystallization, coatings consisting of primary titanium boride crystals of irregular shape and titanium carbide of dendritic morphology are formed. The maximum total volume fraction of these phases was ~ 32 %. Durometric tests were carried out from the surface into the interior of the formed layer. The maximum level of microhardness was recorded in the sample obtained when surfacing 20 wt. % of boron carbide powder and was 5210 MPa. To determine the wear resistance, the obtained modified layers by method of abrasion test by friction against embedded abragant grain. The maximum wear resistance 1.2 times higher than the reference sample was recorded in the sample formed during the surfacing of the powder mixture, which included 20 wt. % boron carbide. Keywords Nonvacuum electron-beam cladding, coats, boron carbide, microhardness, wear resistance