Oxidation Resistance of “Ni-Cr-Si-B-Alloy + Nb + B” Protective Layers, Produced by Non-Vacuum Electron Beam Cladding Technique

Abstract:

The aim of this investigation was to study the influence of Nb-enriched powder mixtures on structure and oxidation resistance of protective layers based on Ni-based self-fluxing alloy, produced by non-vacuum electron beam cladding technique on low-carbon steel substrates. The oxidation resistance of coatings was studied by thermogravimetric analysis (TGA). The samples held at 900°C for two hours in air atmosphere. TGA results indicate that the highest oxidation resistance has the material, obtained by cladding of pure Ni-based self-fluxing alloy. Samples, produced by cladding of Ni-based self-fluxing alloy in combination with Nb-enriched powder mixtures demonstrate lower level of oxidation resistance. Structure of the coatings was characterized by optical and scanning electron microscopy combined with electron microprobe analysis as well as X-ray diffraction.

• Periodical: Materials Science Forum (Volume 1052)
• Pages: 200-205
• DOI: https://doi.org/10.4028/p-108147
• Online since: February 2022
• Authors: Tatyana Zimoglyadova*, Alexey Ruktuev, Ekaterina Rudenya
• Keywords: Ni-Based Self-Fluxing Alloy, Non-Vacuum Electron Beam Cladding, Oxidation Resistance

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