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Title Impact of Magnetic-Pulse and Chemical-Thermal Treatment on Alloyed Steels’ Surface Layer
Authors Kostyk, K.
Kuric, I.
Saga, M.
Kostyk, V.
Ivanov, Vitalii Oleksandrovych  
Kovalov, V.
Pavlenko, Ivan Volodymyrovych  
ORCID http://orcid.org/0000-0003-0595-2660
http://orcid.org/0000-0002-6136-1040
Keywords sustainable manufacturing
alloy steel
hard alloys
surface hardening
magnetic-pulse treatment
nitriding
boriding
layer thickness
hardness
Type Article
Date of Issue 2022
URI https://essuir.sumdu.edu.ua/handle/123456789/87755
Publisher MDPI
License Creative Commons Attribution 4.0 International License
Citation Kostyk, K.; Kuric, I.; Saga, M.; Kostyk, V.; Ivanov, V.; Kovalov, V.; Pavlenko, I. Impact of Magnetic-Pulse and Chemical-Thermal Treatment on Alloyed Steels’ Surface Layer. Appl. Sci. 2022, 12, 469. https://doi.org/10.3390/app12010469
Abstract The relevant problem is searching for up-to-date methods to improve tools and machine parts’ performance due to the hardening of surface layers. This article shows that, after the magnetic-pulse treatment of bearing steel Cr15, its surface microhardness was increased by 40–50% compared to baseline. In this case, the depth of the hardened layer was 0.08–0.1 mm. The magnetic-pulse processing of hard alloys reduces the coefficient of microhardness variation from 0.13 to 0.06. A decrease in the coefficient of variation of wear resistance from 0.48 to 0.27 indicates the increased stability of physical and mechanical properties. The nitriding of alloy steels was accelerated 10-fold that of traditional gas upon receipt of the hardened layer depth of 0.3–0.5 mm. As a result, the surface hardness was increased to 12.7 GPa. Boriding in the nano-dispersed powder was accelerated 2–3-fold compared to existing technologies while ensuring surface hardness up to 21–23 GPa with a boride layer thickness of up to 0.073 mm. Experimental data showed that the cutting tool equipped with inserts from WC92Co8 and WC79TiC15 has a resistance relative to the untreated WC92Co8 higher by 183% and WC85TiC6Co9—than 200%. Depending on alloy steel, nitriding allowed us to raise wear resistance by 120–177%, boriding—by 180–340%, and magneto-pulse treatment—by more than 183–200%.
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