| 2005 №01 (04) | 2005 №01 (06) |
The Paton Welding Journal, 2005, #1, 18-21 pages
Features of the structure of surface metal layers in railway wheel treads after plasma treatment
L.I. Markashova1, G.M. Grigorenko1, M.L. Valevich1, S.V. Petrov2
1E.O. Paton Electric Welding Institute of the NASU. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine.2Institute of Gas, NASU, Kiev, Ukraine
Abstract
It is shown that adjustment of the temperature-rate modes of wheel heating and cooling in the range of working parameters of plasma equipment enables variation of the structural-phase condition of the surface, thus allowing microstructure optimization and providing high values of mechanical properties.
Keywords: plasma surface treatment, finely-dispersed structure, phase distribution, scanning and transmission microscopy, fractography, troostosorbite, martensite, microcracks, dislocation density, internal stress gradients
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