Open AccessThe influence of nitrogen content on the amount of austenite in the structure of the deposited coatings obtained from diffusionsgleichung shavings of steel Р6M5
Author(s) -
В. А. Стефанович,
С. В. Борисов,
А. В. Стефанович
Publication year - 2019
Publication title -
litʹë i metallurgiâ
Language(s) - English
Resource type - Journals
eISSN - 2414-0406
pISSN - 1683-6065
DOI - 10.21122/1683-6065-2019-1-108-111
Subject(s) - materials science , austenite , carbide , nitrogen , metallurgy , carbon fibers , martensite , diffusion , doping , coating , microstructure , composite number , composite material , chemistry , physics , optoelectronics , organic chemistry , thermodynamics
The article presents the results on the structure formation of deposited coatings obtained from steel chips P6M5 subjected to diffusion nitrogen-carbon doping. It was found that the diffusion doping with nitrogen-carbon steel chip waste P6M5 carbon content in them varies between 1.75–3.14%, nitrogen – 0.43–1.24%. The phase composition includes phases: a -Fe, M6C, Fe3C, (Cr, Fe)2N1–x, Fe3N, Cr0.63C0.35N0.03, M4(C, N) depending on the temperature and time of diffusion doping. When surfacing these materials in the deposited coating contains carbide-forming elements 8,6–9,3%, carbon 1,04–1,94%, nitrogen 0,08–0,25%. The structure consists of carbide M23S6, martensite and austenite, while the content of austenite in dendrites can reach 70–90%. It is shown that nitrogen doping of the deposited coatings obtained from steel chips P6M5, subjected to saturation with nitrogen-carbon, more effectively increases the amount of austenite in the structure than alloying the deposited coatings with nitrogen ferroalloys.