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UDK: 625.143.001.8:624.042

Published: Građevinar 64 (2012) 12
Paper type: Original scientific paper
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Hardness distribution over cross-section of grooved rails

Stjepan Lakušić, Maja Ahac

Abstract

Head hardened rails have been introduced In order to extend the rail-replacement cycles for Zagreb tram tracks. During their precurving, the rail cracking occurred. Hardness tests were performed and tensile strength was calculated to establish whether unusual mechanical properties of rail steel are responsible for the cracking. Tests have shown that hardness values, despite significant variation over the rail cross-section, are higher than the prescribed minimum. It is assumed that rail problems encountered may be due to changes in rail steel microstructure resulting from an increase in rail head hardness during its thermal treatment.

Keywords
grooved rails; rail head hardening; hardness measurements; tensile strength

HOW TO CITE THIS ARTICLE:

Lakušić, S., Ahac, M.: Hardness distribution over cross-section of grooved rails, GRAĐEVINAR, 64 (2012) 12, doi: https://doi.org/10.14256/JCE.816.2012

OR:

Lakušić, S., Ahac, M. (2012). Hardness distribution over cross-section of grooved rails, GRAĐEVINAR, 64 (12), doi: https://doi.org/10.14256/JCE.816.2012

LICENCE:

Creative Commons License
This paper is licensed under a Creative Commons Attribution 4.0 International License.
Authors:
Lakusic Foto
Stjepan Lakušić
University of Zagreb
Faculty of Civil Engineering
Department for Transportation Engineering
Ahac Maja
Maja Ahac
University of Zagreb,
Faculty of Civil Engineering,
Department for Transportation Engineering