The Paton Welding Journal, 2015, №06



2015 №06 (21)

DOI of Article 10.15407/tpwj2015.06.22

2015 №06 (23)

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The Paton Welding Journal, 2015, #5-6, 96-100 pages  

Structure and properties of railway wheel surface after restoration surfacing and service loading

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: office@paton.kiev.ua
 
 
Abstract
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.
 
 
Keywords: surfacing, railway wheels, deposited metal, heat-affected zone, structure, phase composition, mechanical properties, crack resistance
 
 
Received:                01.04.15
Published:               28.07.15
 
 
References
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4. Markashova, L.I., Poznyakov, V.D., Gajvoronsky, A.A. et al. (2011) Evaluation of strength and crack resistance of railway wheel metal after long-term service. Fiz.-Khimichna Mekhanika Materialiv, 6, 73-79.
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8. Gajvoronsky, A.A., Poznyakov, V.D., Markashova, L.I. et al. (2012) Influence of deposited metal composition on structure and mechanical properties of reconditioned railway wheels. The Paton Welding J., 8, 16-22.
9. Markashova, L.I., Poznyakov, V.D., Berdnikova, E.N. et al. (2014) Effect of structural factors on mechanical properties and crack resistance of welded joints of metals, alloys and composite materials. Ibid., 6/7, 22-28. https://doi.org/10.15407/tpwj2014.06.04

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