Research on optimal heat input for blade repair of aero compressor

GONG Miao; DAI Shijie; WANG Zhiping; WANG Liwen

doi:10.12073/j.hjxb.20200602001

TRANSACTIONS OF THE CHINA WELDING INSTITUTION > 2020 > 41(8): 39-47. > DOI: 10.12073/j.hjxb.20200602001

GONG Miao, DAI Shijie, WANG Zhiping, WANG Liwen. Research on optimal heat input for blade repair of aero compressor[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2020, 41(8): 39-47. DOI: 10.12073/j.hjxb.20200602001

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Research on optimal heat input for blade repair of aero compressor

1.
Hebei University of Technology, Tianjin, 300401, China
2.
Civil Aviation University of China, Tianjin, 300300, China

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Received Date: June 01, 2020
Available Online: October 21, 2020

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Abstract

Abstract

A heat transfer model for MPAW additive manufacturing repair of compressor blades was established. Firstly, the heat input range was calculated by analyzing the thermal properties of the alloy, and the temperature distribution of molten pool under different heat input was obtained. After that, the mathematical model of the additive manufacturing height and wire feeding speed was established, and the height under different wire feeding speed was solved. Through the numerical analysis of temperature distribution of weld cross-section, the heat input range was further reduced and the experimental parameters were obtained. Finally, with numerical analysis and experimental comparison, the evolution law of microstructure and heat input rate of the alloy repair zone was revealed, and the optimal heat input and welding parameters were obtained. The experimental results are in good agreement with the theoretical model, which verifies the effectiveness of the theoretical method. The results show that the optimal heat input rate can be achieved by using the welding parameters obtained, and the better additive manufacturing morphology and repair effect can be achieved.
- additive manufacturing repair,
- compressor blades,
- heat input,
- heat transfer modeling,
- numerical analysis

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References

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Research on optimal heat input for blade repair of aero compressor