Electron-microscopic study of the structure of the surface layer in high-nitrogen 05Kh22AG15N8M2F steel after face turning
- Authors: Blinov E.V.1
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Affiliations:
- Baikov Institute of Metallurgy and Materials Science
- Issue: Vol 2016, No 1 (2016)
- Pages: 52-57
- Section: Article
- URL: https://journals.rcsi.science/0036-0295/article/view/170326
- DOI: https://doi.org/10.1134/S0036029516010055
- ID: 170326
Cite item
Abstract
The structure of the surface layer in high-nitrogen 05Kh22AG15N8M2F steel workpieces subjected to face turning is studied by electron microscopy. It is found that improved machinability by VK8 alloy cutting tools is achieved at a cutting depth of 0.25 mm and that the cutting-tool life decreases sharply when the cutting depth increases to 1 mm. A nanocrystalline structure with nanocrystal sizes from several to several tens of nanometers forms in the surface layer upon face turning in the as-cast, hot-rolled, and thermally deformed states. The structure of the surface layer is characterized by a high dislocation density and large austenite fragments with broad subgrains and deformation twins.
About the authors
E. V. Blinov
Baikov Institute of Metallurgy and Materials Science
Author for correspondence.
Email: bev001@yandex.ru
Russian Federation, Leninskii pr. 49, Moscow, 119991