Effect of annealing on microstructure in railway wheel steel

Dimitrios Nikas, Yubin Zhang, Johan Ahlström*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

18 Downloads (Pure)

Abstract

Railway wheels are commonly made from medium carbon steels (~0.55 wt.% C), heat treated to a near pearlitic microstructure with 5–10% pro-eutectoid ferrite. During the operation of freight trains, where block brakes are used, high thermal loads occur together with the high contact stresses, which combined can affect the mechanical properties of the material. In this study, the effects of annealing on local microstructure and mechanical properties in pearlitic railway wheel steel were investigated using electron microscopy and micro-hardness. It is found that after annealing at 650 °C, the room temperature hardness reduces about 25%, accompanied by significant spheroidization of cementite in the pearlitic colonies, though the size and the orientation gradients of the pearlitic colonies have not changed much. The relationship between the microstructural changes and the mechanical properties are discussed.
Original languageEnglish
Article number012059
JournalIOP Conference Series: Materials Science and Engineering
Volume1249
Issue number1
Number of pages6
ISSN1757-8981
DOIs
Publication statusPublished - 2022
Event42nd Risø International Symposium on Materials Science - Risø, Denmark
Duration: 5 Sept 20229 Sept 2022
https://www.conferencemanager.dk/42ndsymposium/program

Conference

Conference42nd Risø International Symposium on Materials Science
Country/TerritoryDenmark
CityRisø
Period05/09/202209/09/2022
Internet address

Fingerprint

Dive into the research topics of 'Effect of annealing on microstructure in railway wheel steel'. Together they form a unique fingerprint.

Cite this