Electron-microscopic study of the structure of the surface layer in high-nitrogen 05Kh22AG15N8M2F steel after face turning

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 shar...

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Bibliographic Details
Published inRussian metallurgy Metally Vol. 2016; no. 1; pp. 52 - 57
Main Author Blinov, E. V.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 2016
Springer Nature B.V
Subjects
Chemistry and Materials Science
Cutting parameters
Cutting tools
Hot rolling
Materials Science
Metallic Materials
Nanocrystals
Steels
Structural steels
Surface layer
Turning
Turning (machining)
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Summary: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.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
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ISSN:0036-0295
1555-6255
1531-8648
DOI:10.1134/S0036029516010055