Influence of electrolytic-plasma surface quenching on the structure and strength properties of ferritic-pearlite class wheel steel
Abstract
This paper examines the influence of electrolyte-plasma surface hardening on the structure and micro hardness of wheel steel mark 2. In the work electrolyte-plasma surface quenching was carried out in an electrolyte made from an aqueous solution of 10% carbamide (NH 2 ) 2 CO+20% sodium carbon ate Na 2 CO 3 . The work investigated the strength limit, fluidity and wear intensity of the wheeled steel after electrolyte-plasma surface quenching. After electrolytic-plasma surface quenching, a batch, high-temperature plate and low-temperature plate martensit is formed on the surface of the sample. Investigations have been carried out on microhardness determination on cross-section of wheel steel sam ples after quenching in aqueous solution of electrolyte. It is found that after electrolytic-plasma surface quenching, the microhardening values of this hardened surface layer increased on ≈ 3 times compared to the steel matrix, and the thickness of the hardened layer is 1000-1500 µm. According to the results of the scanning transmission electron microscopy, the electrolyte-plasma surface quenching caused a change in the morphological constituents of steel mark 2. In the initial state, the matrix of steel is a α -phase, the morphological components of which are fragmented ferrite, unfragmented ferrite and pearlite.
About the Authors
B. K. RakhadilovKazakhstan
Y. Y. Tabiyeva
Kazakhstan
G. K. Uazyrkhanova
Kazakhstan
L. G. Zhurerova
Kazakhstan
D. .. Baizhan
Kazakhstan
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Review
For citations:
Rakhadilov B.K., Tabiyeva Y.Y., Uazyrkhanova G.K., Zhurerova L.G., Baizhan D... Influence of electrolytic-plasma surface quenching on the structure and strength properties of ferritic-pearlite class wheel steel. Eurasian Journal of Physics and Functional Materials. 2020;4(2):167-173. https://doi.org/10.29317/ejpfm.2020040208