Original scientific paper

The influence of micro coolers on the physical-mechanical characteristics of the steels used in making railway monoblock wheels

Constantin Andronache ; Politehnica University of Timisoara, Faculty Engineering of Hunedoara, 5 Revolutiei street, Hunedoara, 331128, Romania
Ana Socalici orcid.org/0000-0002-1854-882X ; Politehnica University of Timisoara, Faculty Engineering of Hunedoara, 5 Revolutiei street, Hunedoara, 331128, Romania
Teodor Hepuţ ; Politehnica University of Timisoara, Faculty Engineering of Hunedoara, 5 Revolutiei street, Hunedoara, 331128, Romania

Abstract

The paper introduces the possibilities of improving mechanical characteristics of the steels used in making railway monoblock wheels, by using micro coolers on steel casting. The laboratory experiments are aimed at studying the control of round cross-section steel ingot solidification by adding crystallization germs in their central area, in order to influence the internal structure and the mechanical characteristics of the steel. The stimulation of heterogeneous germination on the surfaces generated by the particles introduced in the center of the ingot, while it was in a liquid state, leads to the formation of a second solidification front and heat absorption in this area. The data we obtained during the research have been processed in Excel, in order to obtain the correlation equations that express the variation of the steel mechanical characteristics as a function of the chemical structure both for the experimental samples and for the reference ones.

Keywords

improvement; micro coolers; physical-mechanical characteristics; railway monoblock wheels; steel

Hrčak ID:

104067

URI

https://hrcak.srce.hr/104067

Publication date:

15.6.2013.

Article data in other languages: croatian

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