Study on Material Optimization and Microstucture Evolution of Aeroengine Sealing Piece
Sealing pieces plays a key role in sealing and vibration reduction of aeroengine.Cracking and deformation of aeroengine caused by low hardness of sealing piece occurred many times.In view of the above problems,an optimization scheme is proposed to replace the sealing piece material from the solid solution state GH600 to the cold rolling state GH5188.The experimental results indicate that the hardness of cold rolling GH5188 sealing piece can still keep at a high level above 350HV after working at design upper limit temperature for 100h.Even after a short-time overtemperature,the hardness can still be equivalent to sealing piece before improvement.The proposed optimization scheme has obvious effect,which can ensure the long-term working reliability of the sealing piece and has good engineering practical value.
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