Effect of Molybdenum Electron-Beam Cladding on the Heat and Wear Resistances of Surface Layers of Chromium-Nickel Austenitic Steel 12Kh18N9T

The structure and properties of surface layers of billets from steel 12Kh18N9T formed by vacuum electron beam surfacing of powder mixtures are studied. The main alloying component is molybdenum in an amount of 40 wt.%. The structural and phase studies are made using optical and electron microscopes...

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Bibliographic Details
Published in:Metal science and heat treatment 2024, Vol.65 (9-10), p.629-634
Main Authors: Pukhova, E. A., Byshueva, E. G., Domarov, E. V., Batyrov, B. B., Burov, V. G.
Format: Article
Language:English
Subjects:
Alloying
Alpha iron
Austenitic stainless steels
Characterization and Evaluation of Materials
Chemistry and Materials Science
Classical Mechanics
Electron beams
Engineering Thermodynamics
Heat and Mass Transfer
Materials Science
Metallic Materials
Microhardness
Molybdenum
Surface layers
Thermal resistance
Thermochemical Treatment and Coatings
Wear resistance
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Summary:The structure and properties of surface layers of billets from steel 12Kh18N9T formed by vacuum electron beam surfacing of powder mixtures are studied. The main alloying component is molybdenum in an amount of 40 wt.%. The structural and phase studies are made using optical and electron microscopes and an x-ray diffractometer. The microhardness and the wear resistance of the deposited layers are determined. The structure of the hardened surface layer is shown to contain phases Mo 0.08 Fe 0.92 , Mo 0.9 Fe 0.1 , Mo 0.1 Fe 0.9 , α-Fe and γ-Fe. The alloying with molybdenum raises the wear resistance of the steel by a factor of 1.8 and the heat resistance by a factor of 6.7.
ISSN:0026-0673
1573-8973
DOI:10.1007/s11041-024-00981-y