EFFECT OF THE CARBON, MANGANESE AND SILICON CONTENT IN CARBON STEELS ON THE DIFFUSION PARAME-TERS OF THE DIFFUSION BORONIZING LAYER
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DOI:
https://doi.org/10.25712/ASTU.2072-8921.2025.01.024Abstract
The paper presents systematic statistical data on the effect of the content of carbon and the main alloying elements (silicon and manganese) on the diffusion parameters and the thickness of the boride layer for most grades of carbon steels used in industry, starting with low-carbon steel 15 and ending with hypereutectoid tool steels up to including U10. The saturation of the steel surface with boron was carried out at temperatures of 850, 950 and 1050 °C in a previously developed and patented original saturating medium. It is shown that an increase in the carbon content in real steels leads to a decrease in the activation energy of boron diffusion. According to the study, the decrease in the activation energy is not monotonous and depends primarily on the carbon content, the maximum rate of decrease in the activation energy of boron diffusion is observed in the range of carbon concentrations from 0.45 to 0.60 wt. %. A comparison of the obtained data with the data of other researchers showed a high convergence of the obtained activation energy values. The range of values defined in this work, which the activation energy function can take for various grades of carbon steel, depending on the content of carbon, silicon and manganese, has prospects for use in practical work to predict the thickness of the diffusion boride layer. This will make it possible to predict the performance characteristics of borated parts, as well as to select the material of the part and optimize the boronizing process in order to obtain an optimal price-quality ratio in relation to finished hardened parts
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Copyright (c) 2025 Sergey G. Ivanov, Mikhail A. Guriev, Sergey A. Zemljakov, Mikhail N. Zenin, Aleksey M. Guriev
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