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Hardening mechanisms for rails metal during long-term operation
https://doi.org/10.22349/1994-6716-2020-103-3-17-28
Abstract
A quantitative comparative analysis of the mechanisms of hardening of the surface layers of differentially hardened 100-m rails is carried out. It was based on structure formation, phase composition, defect substructure regularities revealed by the methods of modern physical materials science. The studies were carried out at different depths of up to 10 mm in the rail head along the central axis and along the axis of symmetry of the fillet in the initial state and after various periods of extremely long-term operation (passed tonnage of 691.8 and 1411 mln. tons brutto). The contributions due to the friction of the matrix lattice, interphase boundaries, dislocation substructure, presence of carbide particles, internal stress fields, solid-solution hardening of the pearlite component of the steel structure are estimated.
Supporting agencies: The analysis of the structural-phase state of steel was carried out with the financial support of the Russian Foundation for Basic Research (RFBR) grant (project No 19-32-60001), the analysis of hardening mechanisms was carried out with the financial support of the Russian Science Foundation grant (project No 19-19-00183).
About the Authors
Yu. F. Ivanov
Institute of High Current Electronics, Siberian Branch of the Russian Academy of Sciences
Russian Federation
Russian Federation
Dr Sc (Phys-Math)
2/3 Akademichesky Ave, 634055 Tomsk
V. E. Kormyshev
Siberian State Industrial University
Russian Federation
Russian Federation
Cand Sc. (Eng)
42 Kirova St, 654007 Novokuznetsk
V. E. Gromov
Siberian State Industrial University
Russian Federation
Russian Federation
Dr Sc (Phys-Math)
42 Kirova St, 654007 Novokuznetsk
A. A. Yuriev
OJSC EVRAZ United West Siberian Metallurgical Plant
Russian Federation
Russian Federation
Cand Sc. (Eng)
19 Kosmicheskoe chaussee, 654043 Novokuznetsk
A. M. Glezer
Institute of Metal Science and Physical Metallurgy, Central Research Institute of Ferrous Metallurgy named after I.P. Bardin
Russian Federation
Russian Federation
Dr Sc (Phys-Math)
9/23 2nd Baumanskaya St, 105005 Moscow
Yu. A. Rubannikova
Siberian State Industrial University
Russian Federation
42 Kirova St, 654007 Novokuznetsk
Russian Federation
42 Kirova St, 654007 Novokuznetsk
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Review
For citations:
Ivanov Yu.F., Kormyshev V.E., Gromov V.E., Yuriev A.A., Glezer A.M., Rubannikova Yu.A. Hardening mechanisms for rails metal during long-term operation. Voprosy Materialovedeniya. 2020;(3(103)):17-28. (In Russ.) https://doi.org/10.22349/1994-6716-2020-103-3-17-28
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