GRAIN STRUCTURE FRAGMENTATION OF QUENCHED RAILS
https://doi.org/10.17073/0368-0797-2015-10-781-784
Abstract
The comparative layer-by-layer analysis of the structure (along the central axis and fi lleted corner) of bulk and differentially quenched rails at a distance of 0, 2 and 10 mm from the roll surface has been done using the methods of transmission electron microscopy. It has been shown that regardless of the research guidelines and the distance of the researched layer from the roll surface the rail structure of all the categories is represented by the pearlite grains of plate-like morphology, ferrite grains, in the content of which one can observe the particles of cementite of various forms (the grains of ferrite-carbide mixture) and the grains of structurally free ferrite (ferrite grains, which do not contain grain-boundary ferrite in the bulk of the carbide phase particles). The morphology and defect substructure of the revealed phases has been studied, as well as established the localization of stress concentrators. The paper also presents the quantitative dependencies of fragment parameters of the grains of ferrite-carbide rail mixture on the thermal processing mode and the distance from the roll surface.
About the Authors
V. E. Gromov
Siberian State Industrial University (42, Kirova str., Novokuznetsk, Kemerovo Region, 654007, Russia)
Russian Federation
Russian Federation
Dr. Sci. (Phys.-math.), Professor, Head of the Chair of Physics named after V.M. Finkel
K. V. Morozov
Siberian State Industrial University (42, Kirova str., Novokuznetsk, Kemerovo Region, 654007, Russia)
Russian Federation
Russian Federation
Engineer, Candidates for a degree of Cand. Sci. (Eng.) of the Chair of Physics named after V.M. Finkel
A. B. Yur’ev
OJSC “EVRAZ – Joint West Siberian Metallurgical Plant” (16, Kosmicheskoe route, Novokuznetsk, Kemerovo Region, 654007,
Russia)
Russian Federation
Dr. Sci. (Eng.), Managing Director
Russian Federation
Dr. Sci. (Eng.), Managing Director
O. A. Peregudov
OJSC “EVRAZ – Joint West Siberian Metallurgical Plant” (16, Kosmicheskoe route, Novokuznetsk, Kemerovo Region, 654007,
Russia)
Russian Federation
Russian Federation
Candidates for a degree of Cand. Sci. (Eng.) of the Chair of Physics named after V.M. Finkel
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Review
For citations:
Gromov V.E., Morozov K.V., Yur’ev A.B., Peregudov O.A. GRAIN STRUCTURE FRAGMENTATION OF QUENCHED RAILS. Izvestiya. Ferrous Metallurgy. 2015;58(10):781-784. (In Russ.) https://doi.org/10.17073/0368-0797-2015-10-781-784
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