Ratio of Wheel/Rail Steel Hardness that Ensures Minimum Wear
Kanayev А. Kanayev A. Мoldakhmetova A.
September 2023Faculty of Engineering, University of Kragujevac
Tribology in Industry
2023#45Issue 3408 - 415 pp.
Different variants of the hardness of the wheel/rail friction pair were investigated to determine the optimal hardness range of the wheel/rail that ensures the minimum wear under selected test conditions. A pair of tests was performed on an MI-2 machine with a cylindrical wheel steel roller and a rail steel liner. The hardness of the wheel steel specimens ranged from 275 to 900 HVw. The selected of the rail steel samples of 345-455 HVr covers the possible hardness variations (350-405 HVr) of R65 type long rails produced on the standard ST RK 2432-2013 “Railway Rails Differentially Hardened and Non-heat-strengthened.” Technical Requirements. The optimal ratio of wheel/rail hardness, which ensures minimum wear due to weight loss of the tested samples, is the interval HVw/HVr–1.41-1.59. This ratio of wheel/rail hardness is practically confirmed when linear wear is determined by micrometric measurement of the impression size with HVw/HVr–1.39-1.56. The results of the laboratory tests and the suggestions for the optimal ratio of wheel/rail hardness to improve wear resistance should be verified under field conditions. Oscillography of the destruction process of plasma-hardened and non-strengthened specimens was performed to evaluate the resistance to crack initiation and propagation.
Crack resistance , Hardness ratio , Martensite , Plasma quenching , Rail , Sorbite , Troostite , Wheel
Text of the article Перейти на текст статьи
Department of Scientific Projects and Publications, L. Gumiliyov, Eurasian National University, 2 Satbayev St, Astana, Kazakhstan
Department of Standardization, Metrology and Certification, S. Seifullin Kazakh Agrotechnical Research University, 62 Zhenis St, Astana, Kazakhstan
Department of Scientific Projects and Publications
Department of Standardization
10 лет помогаем публиковать статьи Международный издатель
Книга Публикация научной статьи Волощук 2026 Book Publication of a scientific article 2026