Formation of Fine Structure of Differentially Hardened Rails

Victor Gromov; Yu.F. Ivanov; K.V. Morozov; K.V. Alsaraeva

doi:10.4028/www.scientific.net/AMM.682.41

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 682Formation of Fine Structure of Differentially...

Formation of Fine Structure of Differentially Hardened Rails

Abstract:

Differential hardening of rails by compressed air at different regimes is accompanied by formation of morphologically different structure, being formed according to the diffusion mechanism of γ ↔ α transformation and consisting of grains of lamellar pearlite, free ferrite and grains of ferrite-carbide mixture.By methods of transmission electron microscopy the layer by layer analysis of differentially hardened rails has been carried out, the quantitative parameters of the structure, phase composition and dislocation substructure have been established and their comparison has been made for different regimes of hardening. It has been found that the structure-phase states being formed have gradient character, defined by the hardening regime, direction of study from the tread contact surface and by depth of location of layer under study.

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Periodical:

Applied Mechanics and Materials (Volume 682)

Pages:

41-45

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.682.41

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Online since:

October 2014

Authors:

Victor Gromov*, Yu.F. Ivanov, K.V. Morozov, K.V. Alsaraeva

Keywords:

Dislocation Substructure, Electron Microscopy, Phase Composition, Rails, Steel, Structure

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References

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