Open AccessSpecificity of carbon diffusion during plasma electrolytic treatment of steel
Author(s) -
S. Yu. Shadrin,
С. А. Кусманов,
T A Kovrizhnykh,
П. Н. Белкин
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1713/1/012042
Subject(s) - materials science , electrolyte , diffusion , diffusion layer , oxide , carbon fibers , dissolution , martensite , carbon steel , metallurgy , anode , layer (electronics) , microstructure , chemical engineering , chemistry , composite material , corrosion , electrode , thermodynamics , physics , composite number , engineering
This work is devoted to evaluation of the diffusion coefficient of carbon using the thickness of the martensitic layer after plasma electrolytic carburising in various electrolytes followed by quenching. The effective diffusion coefficients of carbon in the structure of mild steel containing oxide and martensitic layers are determined. The maximum diffusion coefficient at a carburising temperature of 900 °C is 23.6. 10 −8 cm 2 /s for treatment in an acetone-based electrolyte for 1 min. The obtained values were comparable with the calculation results for the thickness of the pearlite layer after anodic plasma electrolytic carburising as well as data of measurements of the distribution of carbon concentration in the carburised layer after cathodic saturation. The influence of the oxide layer inhibiting the diffusion of carbon and the possibility of controlling its thickness by varying the concentration of ammonium chloride, which provides anodic dissolution of steel, were confirmed.