TPWJ, 2015, #5-6, 96-100 pages
Structure and properties of railway wheel surface after restoration surfacing and service loading
Journal The Paton Welding Journal
Publisher International Association «Welding»
ISSN 0957-798X (print)
Issue ¹ 5/6, 2015 (May/June)
L.I. Markashova, V.D. Poznyakov, A.A. Gajvoronsky, E.N. Berdnikova And T.A. Alekseenko
E.O. Paton Electric Welding Institute, NASU. 11 Bozhenko Str., 03680, Kiev, Ukraine. E-mail: firstname.lastname@example.org
Presented are the investigations of effect of composition of surfacing consumables on structure and phase composition of deposited metal of surfacing zones (surface, fusion line, HAZ) in restoration of railway wheels from grade 2 steel. Information received at different structural layers (from grain to dislocation) was used for analytical estimations of effect of parameters of forming structures on mechanical properties (s0.2, K1c) of railway wheels, reconstructed by surfacing, before and after operation. Role of structural factors in change of level of local internal stresses tl.in, i.e. sources of crack formation in subsurface layers of deposited metal, was investigated. It is determined that surfacing consumables of bainite and bainite-martensite classes provide for high indices of mechanical properties and crack resistance of railway wheels after restoration repair and operation. 9 Ref., 1 Table, 5 Figures.
surfacing, railway wheels, deposited metal, heat-affected zone, structure, phase composition, mechanical properties, crack resistance
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