Production of Co–Cr–Al–Y–Si powder alloys

A more effective process of producing the Co–Cr–Al–Y–Si powder with 40–100 mm particles has been developed. This process yields 70% of this powder fraction, while other existing processes provide 50–60%. The proposed process involves melting of ingots in an electron-beam unit and their subsequent fr...

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Bibliographic Details
Published in:Powder metallurgy and metal ceramics 2013-03, Vol.51 (11-12), p.633-638
Main Authors: Grechanyuk, N. I., Gogaev, K. A., Zatovskii, V. G.
Format: Article
Language:English
Subjects:
Alloys
Ceramics
Characterization and Evaluation of Materials
Chemistry and Materials Science
Coatings
Cobalt
Composites
Energy consumption
Gas turbine engines
Gas-turbines
Glass
Ingots
Manufacturing Technology
Materials Science
Metallic Materials
Natural Materials
Powder metallurgy
Powders
Production processes
Properties of Powders and Fibers
Rolling mills
Theory
Thermal protection
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Summary:A more effective process of producing the Co–Cr–Al–Y–Si powder with 40–100 mm particles has been developed. This process yields 70% of this powder fraction, while other existing processes provide 50–60%. The proposed process involves melting of ingots in an electron-beam unit and their subsequent fragmentation using a press and strip rolling mill. It is shown that energy consumption is lower during this mechanical grinding compared to the use of crushers and mills and is almost 20 times higher in atomization. The developed process is waste-free: 40 μm powder fraction is remetled in the ingot production process. The method of producing the Co–Cr–Al–Y–Si powder has been patented. The powder is used as a heat-resistant sublayer of thermal protection coatings for blades of gas turbine engines.
ISSN:1068-1302
1573-9066
DOI:10.1007/s11106-013-9479-9