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The focus of this study revolves around the utilization of High Velocity Oxy Fuel (HVOF) sprayed coatings, specifically Cr3C2-25NiCr and Cr2O3, onto 13Cr4Ni turbine steels. These coatings underwent testing in a specially designed laboratory setup to simulate accelerated slurry erosion conditions. The investigation employed the Taguchi approach to vary three factors i.e. Slurry concentration, Impact velocity and Impact angle. Microstructural analyses on the coatings, erodent particles, and coating powder were conducted by employing a Scanning Electron Microscope (SEM) technique. Results demonstrated a significant enhancement in erosion resistance for 13Cr4Ni turbine steels with HVOF-sprayed Cr3C2-25NiCr and Cr2O3 coatings, attributed to their higher micro-hardness compared to the steels. SEM images captured before and after erosion tests indicated mixed (ductile and brittle) behavior for the Cr3C2-25NiCr coating and predominantly ductile behavior for the Cr2O3 coating during slurry erosion.

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Improving Turbine Steel Erosion Resistance: Investigating HVOF-Sprayed Coatings and Predictive Modeling

  • 会议论文

  • 发表日期：

    2025年

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  • Mithlesh Sharma,
  • Deepak Kumar Goyal,
  • Gagandeep Kaushal,
  • Onkar Singh

摘要

The focus of this study revolves around the utilization of High Velocity Oxy Fuel (HVOF) sprayed coatings, specifically Cr3C2-25NiCr and Cr2O3, onto 13Cr4Ni turbine steels. These coatings underwent testing in a specially designed laboratory setup to simulate accelerated slurry erosion conditions. The investigation employed the Taguchi approach to vary three factors i.e. Slurry concentration, Impact velocity and Impact angle. Microstructural analyses on the coatings, erodent particles, and coating powder were conducted by employing a Scanning Electron Microscope (SEM) technique. Results demonstrated a significant enhancement in erosion resistance for 13Cr4Ni turbine steels with HVOF-sprayed Cr3C2-25NiCr and Cr2O3 coatings, attributed to their higher micro-hardness compared to the steels. SEM images captured before and after erosion tests indicated mixed (ductile and brittle) behavior for the Cr3C2-25NiCr coating and predominantly ductile behavior for the Cr2O3 coating during slurry erosion.