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Forming and performance control of pulsed laser remanufacturing for K418 alloy impeller
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1.Jiangsu University of Technology;2.Academy of Armored Forces Engineering

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TG407

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    Abstract:

    Aiming at the high material cost of K418 cast super alloy impeller, the complex manufacturing process and the currently volume damage, the laser remanufacture for edge volume damage of this type was taken for target, the composition approached and process matched alloy was designed, the shape and performance was recovered by using the waveform modulated pulse laser. The results of experiments show that, there were no surface and internal cracks existed,there was metallurgical bonding between the forming layer and the substrate, the forming precision was within 1mm, the deformation precision is within 0.03mm, the surface hardness of the forming zone was 900~1400 HV0.1 , which is 20% higher than the substrate. Under the high temperature dynamic balance test, the maximum rotation of the impeller is 13500 r/min, the maximum amplitude is 0.4mm, there is no exception, no deflection and surge existed, which meet the dynamic balance performance requirements.

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[任维彬,Zhou Jinyu, Zhang Suorong, Xu Binshi, Wang Yujiang, Chen Guoyan. Forming and performance control of pulsed laser remanufacturing for K418 alloy impeller[J]. Rare Metal Materials and Engineering,2019,48(10):3315~3319.]
DOI:10.12442/j. issn.1002-185X.20180434

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History
  • Received:April 27,2018
  • Revised:June 24,2018
  • Adopted:June 27,2018
  • Online: November 01,2019
  • Published: