Structure and Properties of R18U Surfacing of Highspeed Steel After its High Tempering

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-...

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Bibliographic Details
Published in:Russian physics journal 2023-11, Vol.66 (7), p.731-739
Main Authors: Ivanov, Yu. F., Gromov, V. E., Potekaev, A. I., Guseva, T. P., Chapaikin, A. S., Vashchuk, E. S., Romanov, D. A.
Format: Article
Language:English
Subjects:
Alpha iron
Cementite
Coefficient of friction
Condensed Matter Physics
Flux cored wires
Hadrons
Heavy Ions
High speed tool steels
High temperature
Iron carbides
Lasers
Mathematical and Computational Physics
Microhardness
Nuclear Physics
Optical Devices
Optics
Photonics
Physics
Physics and Astronomy
Surfacing
Tempering
Theoretical
Wear resistance
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Summary: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 Fe 3 W 3 C (M 6 C) carbide phase located along the boundaries. Nanosized particles of carbides of the V 4 C 3 , Cr 7 C 3 , Fe 3 C, Cr 23 C 6 and WC 1– 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%.
ISSN:1064-8887
1573-9228
DOI:10.1007/s11182-023-02999-w