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<p>The optimized laser cladding process parameters are mostly for flat substrates, and there are fewer studies on cylindrical surfaces. In order to obtain high-quality cladding layers on cylindrical surfaces, this paper adopts the Entropy Weight-Grey Correlation Analysis Method (EWM-GRA) to optimize the laser cladding process parameters (laser power, rotational speed and powder feeding speed) for Inconel 625 cylindrical surfaces. Firstly, the effects of laser power, rotational speed and powder feeding speed on the cladding quality were investigated by variance analysis and signal-to-noise ratio analysis. Then, the optimal process parameters were determined using the EWM-GRA correlation method: laser power 450&#xa0;W, rotational speed 8.6&#xa0;r/min, powder feeding speed 10.25&#xa0;g/min. The optimized process parameters were subsequently verified using the entropy weight-TOPSIS method, yielding consistent results. Finally, Multi-track repair experiments using the optimized process parameters showed that the cladding layer mainly showed a cellular crystal structure, while the molten pool area was predominantly dendritic. The average hardness obtained was 291.3&#xa0;HV, confirming the applicability and effectiveness of this process parameter optimization method for laser cladding repair of cylindrical surfaces.</p>

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Process Parameter Optimization of Laser Cladding Inconel 625 Cylindrical Surface based on Entropy Weight-Grey Correlation Analysis Method

  • 期刊论文

  • 发表日期：

    2025年3月20日

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  • Yingying Zhang,
  • Jiayu Sun,
  • Liaoyuan Chen,
  • Tianbiao Yu

摘要

The optimized laser cladding process parameters are mostly for flat substrates, and there are fewer studies on cylindrical surfaces. In order to obtain high-quality cladding layers on cylindrical surfaces, this paper adopts the Entropy Weight-Grey Correlation Analysis Method (EWM-GRA) to optimize the laser cladding process parameters (laser power, rotational speed and powder feeding speed) for Inconel 625 cylindrical surfaces. Firstly, the effects of laser power, rotational speed and powder feeding speed on the cladding quality were investigated by variance analysis and signal-to-noise ratio analysis. Then, the optimal process parameters were determined using the EWM-GRA correlation method: laser power 450 W, rotational speed 8.6 r/min, powder feeding speed 10.25 g/min. The optimized process parameters were subsequently verified using the entropy weight-TOPSIS method, yielding consistent results. Finally, Multi-track repair experiments using the optimized process parameters showed that the cladding layer mainly showed a cellular crystal structure, while the molten pool area was predominantly dendritic. The average hardness obtained was 291.3 HV, confirming the applicability and effectiveness of this process parameter optimization method for laser cladding repair of cylindrical surfaces.