MATEC Web Conf.
Volume 294, 20192nd International Scientific and Practical Conference “Energy-Optimal Technologies, Logistic and Safety on Transport” (EOT-2019)
|Number of page(s)||6|
|Published online||16 October 2019|
Improving the performance parameters of railway wheels with the help of optimal design technologies of their electric pulse processing
DNURT, Department of Applied Mechanics and Materials Science, 49010, Dnipro, Lazaryan St., 2, Ukraine
2 DNURT, Lviv Branch, 79052, Lviv, I.Blazhkevych Str., 12-a, Ukraine
3 Lviv Research Institute of Forensic Science, 79000 Lviv, Ukraine
4 Head Department of the Pridniprovk Railway, 49600, Dnipro, D.Yavornizkogo Av., 108, Ukraine
* Corresponding author: email@example.com
The processing by pulses of electric current (PEC) of a fragment of the rim of a railway wheel was carried out on the DS10D equipment. When the density of the electric current is from 3 to 17 A/mm2, the processing cycle consisted of the action of a pulse with a duration of 2.5-3 s and a pause between pulses of 4 s. After 150 cycles of PEC, the hardness of cold-formed metal was reduced from 10 to 20%. Studies of the parameters of the metal structure of the wheels have determined that the processing of PEC leads to a decrease in the number of defects in the internal structure, which are accumulated as a result of cold deformation of the rim along the rolling surface of the railway wheel. It has been established that, according to the nature of the influence on the hardness distribution of carbon steel, the PEC treatment corresponds to changes during tempering in the average temperature range and allows to significantly increase the operating parameters of the wheels of railway equipment.
© The Authors, published by EDP Sciences, 2019
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