Influence of manufacturing conditions of carbonitriding on formation of surface layers and protective properties of hot-work structural steel
- Authors: Ladyanov V.I.1, Goncharov O.Y.1, Malenko P.I.2, Leonov A.Y.2, Relmasira K.D.2
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Affiliations:
- Physicotechnical Institute, Ural Branch
- Tula State University
- Issue: Vol 7, No 4 (2016)
- Pages: 610-617
- Section: Article
- URL: https://journals.rcsi.science/2075-1133/article/view/205523
- DOI: https://doi.org/10.1134/S2075113316040171
- ID: 205523
Cite item
Abstract
In this work, the deposition conditions and phase composition of a carbonitrided coating on a complex alloyed hot-work 25Kh3M3NBTsA structural steel are studied using thermodynamic modeling and structural methods. It is shown that the main phases of the surface layers of carbonitrided steel are the solution of nitrogen and carbon in α-Fe, carbonitride, iron nitrides, and chromium and iron carbides. According to the results of thermodynamic analysis, carbide precipitate based on the Fe3C phase and CrN-based nitride precipitate can be formed. The possible reasons for the absence of the CrN phase in experimental data are indicated. It is shown that the wear rate of carbonitrided coatings is determined by the microhardness of the carbonitrided layer, whereas the fatigue life is related to the crack propagation rate.
About the authors
V. I. Ladyanov
Physicotechnical Institute, Ural Branch
Email: malenko@tsu.tula.ru
Russian Federation, Izhevsk
O. Yu. Goncharov
Physicotechnical Institute, Ural Branch
Email: malenko@tsu.tula.ru
Russian Federation, Izhevsk
P. I. Malenko
Tula State University
Author for correspondence.
Email: malenko@tsu.tula.ru
Russian Federation, Tula
A. Yu. Leonov
Tula State University
Email: malenko@tsu.tula.ru
Russian Federation, Tula
K. D. Relmasira
Tula State University
Email: malenko@tsu.tula.ru
Russian Federation, Tula