Natural ageing effects on microstructure and properties of rail fastening elements SKL-12

• Autorzy: Labisz Krzysztof , Konieczny Jarosław

Identyfikatory

DOI

10.20858/sjsutst.2020.106.7

• Języki publikacji: EN

Abstrakty

EN

Rail transport is presently one of the most supported means of transport in Europe; it existed from the end of the 18th century. However, some issues especially concerning materials and its exploitation are still actual and are a matter of scientific projects or developments. In this paper, analyses concerning the characterisation of used track infrastructure elements in form of sleepers of the popular rail fastening system SKL 12 were performed. Specifically, the main objective of the work was the characteristics of the material microstructure and properties after long-term usage and natural ageing, reaching over a few decades. In this paper was conducted investigations concerning the non-used and used fasteners by reason of classic material research methods. The analysis was carried out based on the results obtained through research using mainly light, scanning electron microscopy (SEM) and transmission electron microscopy (TEM), as well as electron diffraction for the lattice structure determination, EDS chemical microanalysis and Rockwell hardness testing were also carried out in terms of identification of the chemical analysis changes that occurred after long-term application. The main reason was to characterise the long-term usage for the microstructure changes on the surface layer of the used fasteners compared to newly produced material.

Słowa kluczowe

EN

microstructure; rail fastening system; sleepers; mechanical properties; rail steel; electron diffraction

PL

mikrostruktura; system przytwierdzeń szyn; podkłady; właściwości mechaniczne; stal szynowa; dyfrakcja elektronów

• Wydawca: Wydawnictwo Politechniki Śląskiej
• Czasopismo: Zeszyty Naukowe. Transport / Politechnika Śląska
• Rocznik: 2020
• Tom: z. 106
• Strony: 85--96
• Opis fizyczny: Bibliogr. 8 poz.

Twórcy

autor

Labisz Krzysztof

• Faculty of Transport, The Silesian University of Technology, Krasińskiego 8 Street, 40-019 Katowice, Poland

autor

Konieczny Jarosław

• Faculty of Transport, The Silesian University of Technology, Krasińskiego 8 Street, 40-019 Katowice, Poland

Bibliografia

• 1. PKP Polish Railways. 2010. Conditions for making and receiving elastic feet and springs that tie rails to sleepers and dumpers Id – 109. Warsaw.
• 2. Kaikai Wang, Zhunli Tan, Guhui Gao, Xiaolu Gui, R.DK. Misra, Bingzhe Baia. 2016. “Ultrahigh strength-toughness combination in Bainitic rail steel: The determining role of austenite stability during tempering”. Materials Science and Engineering A 662: 162-168. DOI: https://doi.org/10.1016/j.msea.2016.03.043.
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• 4. Urbańczyk Edward, Janusz Kasprowicz. 2004. “Railway rails - requirements, technology and market position”. Seminar materials: Sixth seminar of Diagnostics of Railroad Diagnostics: 293-306. Ironworks Katowice. Poland.
• 5. Zygmunt Tomasz. 2008. The effect of cyclic controlled cooling on the mechanical and operational properties of the rails. Katowice.
• 6. Pagliara Francesca, Luigi Biggiero, Alessia Patrone, Francesca Peruggini. 2016. “An analysis of spatial equity concerning investments in high-speed rail systems: the case study of Italy”. Transport Problems 11(3): 55-68. DOI: 10.20858/tp.2016.11.3.6.
• 7. Zaborowska Izabella. 2016. “Evaluation of microstructure and properties of SKL-12 fastening after long term usage”. MSc thesis. Gliwice. Silesian University of Technology.
• 8. Gwoździk Monika, Zygmunt Nitkiewicz. 2009. “Wear resistance of steel designed for surgical instruments after heat and surface treatments”. Archives of Metallurgy and Materials 54(1): 241-246.