Change in the Properties of Rail Steels during Operation and Reutilization of Rails; Metals; Vol. 13, iss. 6

Change in the Properties of Rail Steels during Operation and Reutilization of Rails; Metals; Vol. 13, iss. 6

Бібліографічні деталі
Parent link:Metals
Vol. 13, iss. 6.— 2023.— [1043, 16 p.]
Співавтор: Национальный исследовательский Томский политехнический университет Инженерная школа новых производственных технологий Отделение материаловедения
Інші автори: Elemesov K. K. Kasym Koptleuevich, Baskanbaeva D. D. Dinara Dzhumabaevna, Martyushev N. V. Nikita Vladimirovich, Skeeba V. Yu. Vadim Yurjevich, Gozbenko V. E. Valery Erofeevich, Karlina A. I. Antonina Igorevna
Резюме:Title screen
The paper considers the possibility of reusing previously used railway rails. The analysis is conducted using the standards and operating conditions of the rails of one of the Central Asian states, Kazakhstan, as an example. The operation of these rails causes significant stresses, while the surface layers are strengthened as a result of cold hammering. These phenomena significantly change the physical and mechanical characteristics of rails. As a result, they may not be suitable in terms of parameters for basic use but can be suitable for installation on other tracks. The conducted studies have shown that when the standard service life of the RP65 rail expires, the surface layer is deformed to a depth of up to 300 microns, hardness increases, and internal residual stresses are formed. These changes lead to an increase in the strength properties of the rails. However, at the same time, cracks originate in the surface layer of the rail, thus worsening operational characteristics. The RP65 rails are used under a cyclic load of 700 kN (which is determined by the national standard), withstanding 790,000 cycles. When the load is reduced to 510 kN, these rails can withstand the 2,000,000 cycles required by the standard without failure. Thus, these rails can be reutilized only on non-loaded and non-critical sections.
Мова:Англійська
Опубліковано: 2023
Предмети:
электронный ресурс
труды учёных ТПУ
rails
rail steel
reutilization
fatigue life
rail reliability
Онлайн доступ:http://earchive.tpu.ru/handle/11683/132529
https://doi.org/10.3390/met13061043
Формат: Електронний ресурс Частина з книги
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=669574

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