Using plasma surfacing in a nitrogen environment with a PP-R18U non-current-carrying flux-cored wire, the layers up to 10 mm thick were formed on a 30HGSA steel, followed by an additional high-temperature tempering (at 580°C for 1 hour in 4 tempers). It is shown that the deposited layer has a frame-type structure formed by α-iron grains with extended layers of the Fe3W3C (M6C) carbide phase located along the boundaries. Nanosized particles of carbides of the V4C3, Cr7C3, Fe3C, Cr23C6 and WC1–x types are identified in the grain volume. It is found out that high tempering increases the microhardness of the deposited PP-R18U layer by 13% (up to 5.3 GPa) and decreases its wear resistance by 12.3% the friction coefficient by 7.7%.
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Ivanov, Y.F., Gromov, V.E., Potekaev, A.I. et al. Structure and Properties of R18U Surfacing of Highspeed Steel After its High Tempering. Russ Phys J 66, 731–739 (2023). https://doi.org/10.1007/s11182-023-02999-w
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DOI: https://doi.org/10.1007/s11182-023-02999-w