Changing the structure and phasestates and the microhardness of the R6M5 steel surface layer after electrolytic-plasma nitriding

The article examines the changes of the structural-phase states and the microhardness of the R6M5 steel surface layer after electrolytic-plasma nitriding. It is found that after electrolytic-plasma nitriding of the R6M5 steel surface, diffusion layer is formed, which is a nitrogen martensite. The ph...

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Bibliographic Details
Published in:Eurasian journal of physics and functional materials 2021-11, Vol.2 (3), p.259-266
Main Authors: Rakhadilov, B.K., Kurbanbekov, Sh.R., Kilishkhanov, M.K., Kenesbekov, A.B.
Format: Article
Language:English
Subjects:
high-speed steel
microhardness
microstructure
nitriding
phase composition
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Summary:The article examines the changes of the structural-phase states and the microhardness of the R6M5 steel surface layer after electrolytic-plasma nitriding. It is found that after electrolytic-plasma nitriding of the R6M5 steel surface, diffusion layer is formed, which is a nitrogen martensite. The phase composition of the diffusion layer varies depending on the nitriding temperature. An increase of R6M5 steel microhardness, depending on structural-phase state, is found out. The main factor, in fluencing the increase of microhardness of R6M5 high-speed steel with electrolytic-plasma nitriding, is the formation of nitro . gen martensite with monophasic nitride Fe4N ( γ-phase), as well as the formation of fine inclusions, hardening phases in the surface layers.
ISSN:2522-9869
2616-8537
DOI:10.29317/ejpfm.2018020307