Preparation process method for high-temperature protective coating of IMC (intermetallic compound) alloy

The invention provides a preparation process method for a high-temperature protective coating of IMC (intermetallic compound) alloy. Details of the method are as follows: the thickness of a NiCrAlYSi coating prepared on a Ni3Al base guide blade is required within 0.015 to 0.06mm; the thickness of th...

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Bibliographische Detailangaben
Hauptverfasser: WANG LU, YUAN FUHE, ZHANG FANYUN, LI SHUANG, ZHANG JIAPING, SHI FENGLING, WEI MINGXIA, ZHANG ZUNLI, GONG YINGYONG
Format: Patent
Sprache:chi ; eng
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Zusammenfassung:The invention provides a preparation process method for a high-temperature protective coating of IMC (intermetallic compound) alloy. Details of the method are as follows: the thickness of a NiCrAlYSi coating prepared on a Ni3Al base guide blade is required within 0.015 to 0.06mm; the thickness of the coating is required to be thin, the granularity of adopted spraying powder is fine, NiCrAlYSi alloy powder is adopted particularly, and the mass ratio of each component is that Cr (18 to 23%), Al (7.5 to 12%), Y (0.08 to 0.8%), Si (0.2 to 1.0%), and the rest is Ni; supersonic speed flame spraying is adopted, kerosene and oxygen gas are adopted as a combustion source, argon gas is used for powder transportation, the flow rate of the oxygen gas is within 1,700 to 1,750 SCFH, the flow rate of the kerosene is within 6.0 to 7.0 GPH, and the spraying distance is within 350 to 370mm. The preparation process method has the following advantages: the spraying process of the preparation process method is simple as well as f