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Phase Composition and Defect Substructure of Strengthening Layer Surfaced on Low Alloyed Steel

Ivanov, Yurii F. I; Gromov, Victor E.; Konovalov, Konovalov; Kormyshev, Vassily E.; Qin, Rongshan and Semina, Olga A (2018). Phase Composition and Defect Substructure of Strengthening Layer Surfaced on Low Alloyed Steel. Journal of Metastable and Nanocrystalline Materials, 30 pp. 28–33.

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DOI (Digital Object Identifier) Link: https://doi.org/10.4028/www.scientific.net/JMNM.30.28
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Abstract

The microstructure and microhardness distribution in surface of low carbon Hardox 450 steel coated with alloyed powder wires of different chemical compositions are studied. It is shown that the microhardness of 6-8 mm thickness surfaced layer exceeds that of base metal by more than 2 times. The increased mechanical properties of surfaced layer are caused by the submicro and nanoscale dispersed martensite, containing the niobium carbides Nb2C, NbC and iron borides Fe2B. In the bulk plates a dislocation substructure of the net-like type with scalar islocation density of 10^11 cm^-2 is observed. The layer surfaced with the wire containing B possesses the highest hardness. The possible mechanisms of niobium and boron carbides formation in surfacing are discussed

Item Type: Journal Item
ISSN: 2297-6620
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Engineering and Innovation
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Item ID: 52583
Depositing User: Rongshan Qin
Date Deposited: 05 Dec 2017 15:17
Last Modified: 02 May 2018 14:36
URI: http://oro.open.ac.uk/id/eprint/52583
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