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.
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Translated from Poroshkovaya Metallurgiya, Vol. 51, No. 11–12 (488), pp. 18–25, 2012.
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Grechanyuk, N.I., Gogaev, K.A. & Zatovskii, V.G. Production of Co–Cr–Al–Y–Si powder alloys. Powder Metall Met Ceram 51, 633–638 (2013). https://doi.org/10.1007/s11106-013-9479-9
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DOI: https://doi.org/10.1007/s11106-013-9479-9