Abstract
This paper presents the feasibility of using High-Speed Laser Cladding technology to apply Inconel 718 as coating material for high-temperature corrosion resistance. In this study, the effect of process parameters, such as laser power, powder flow rate, speed and stepover distance, was analyzed for producing Inconel 718 coatings on 42CrMo4 steel cylinders, by means of metallographic analysis and defect identification. The coating process was optimized in terms of layer thickness, defect avoidance and powder catchment efficiency. The thickness of coating layers ranged from 0.13 mm to 0.35 mm with an average porosity between 0.12 % and 0.17 %. The powder catchment efficiency ranged from 80 % to 91 %. Finally, multilayer coatings were also produced with the best process parameters to achieve protective coatings with thickness up to 0.5 mm.
Published Version
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