STRUCTURE PHASE STATES AND DEFECT SUBSTRUCTURE OF DIFFERENTIALLY HARDENED RAILS
https://doi.org/10.17073/0368-0797-2014-12-29-32
Abstract
The differential quenching of the rails by compressed air is the most perspective strengthening method. The layer by layer analysis of differentially quenched rails is carried out using transmission electron microscopy methods and the quantitative parameters of structure, phase composition and dislocation substructure are established and comparison of these parameters for different quenching regimes is made. It is established that the differentiated hardening of rails by compressed air in different regimes is accompanied by the formation of morphologically different structure, being formed according to the diffusion mechanism of γ → α transformation and consisting of plate perlite grains, free ferrite grains and grains of ferritecarbide mixture. The being formed structure has the expressed gradient character: surface layer state of rail steel depends not only on the quenching regime but on the investigation direction and the depths of analyzed layer from the surface. The dislocation substructure in the form of chaos, nets, cells and fragments is revealed.
About the Authors
V. E. Gromov
Siberian State Industrial University (42, Kirova str., Novokuznetsk, Kemerovo Region, 654007, Russia)
Russian Federation
Dr. Sci. (Phys.-math.), Professor, Head of Department
Russian Federation
Dr. Sci. (Phys.-math.), Professor, Head of Department
A. B. Yur’iev
OJSC “EVRAZ – WSMP” (16, Kosmicheskoe highway, Novokuznetsk, Kemerovo Region, 654043, Russia)
Russian Federation
Dr. Sci. (Eng.), Managing Director
Russian Federation
Dr. Sci. (Eng.), Managing Director
K. V. Morozov
Siberian State Industrial University (42, Kirova str., Novokuznetsk, Kemerovo Region, 654007, Russia)
Russian Federation
Applicant
Russian Federation
Applicant
Yu. F. Ivanov
Institute of High Current Electronics SB RAS (2/3, Akademicheeskii pr., Tomsk, 634036, Russia)
National Research Tomsk Polytechnic University (Tomsk, Russia)(30, Lenina pr., Tomsk, 634036, Russia)
Russian Federation
Dr. Sci. (Phys.-math.), Professor, Chief Researcher
Russian Federation
Dr. Sci. (Phys.-math.), Professor, Chief Researcher
K. V. Alsaraeva
Siberian State Industrial University (42, Kirova str., Novokuznetsk, Kemerovo Region, 654007, Russia)
Russian Federation
Postgraduate
Russian Federation
Postgraduate
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Review
For citations:
Gromov V.E., Yur’iev A.B., Morozov K.V., Ivanov Yu.F., Alsaraeva K.V. STRUCTURE PHASE STATES AND DEFECT SUBSTRUCTURE OF DIFFERENTIALLY HARDENED RAILS. Izvestiya. Ferrous Metallurgy. 2014;57(12):29-32. (In Russ.) https://doi.org/10.17073/0368-0797-2014-12-29-32
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