Study of correlation of the chemical and phase composition and fracture toughness of railway wheel steel

Keywords

railway wheels, mechanical properties, microstructure, chemical composition.

Cite as

Babachenko О. І., Kononenko G. A., Podolskyi R. V., Safronova O. A., Safronov О. L., and Dementieva Zh. A. Study of correlation of the chemical and phase composition and fracture toughness of railway wheel steel. Physicochemical Mechanics of Materials. 2024. 60(1), 042-048.

https://doi.org/10.15407/pcmm2024.01.042

Abstract

The influence of the structural state on the set of properties of the railway wheel metal was studied. Correlation between metal characteristics was established. The negative impact of structural heterogeneity on the fracture toughness of K_1C of carbon steel for railway wheels (С approx. 0.47 mass%) was established. The bainite in the steel structure in the amount of 10 to 15% leads to the decrease in the fracture toughness K_1C by 25–36% in comparison with this characteristic for the steel with a uniform ferrite-pearlite structure (the increase in the amount of bainite in the structure on average by 1% causes the decrease in fracture toughness by 2.7%).

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