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<p>This paper presents a&#xa0;study on the structure and properties of coatings formed on 12Kh18N9T structural steel surfaces. Nickel-based powder compositions were deposited using a&#xa0;commercial ELV‑8 electron accelerator in an air atmosphere. The primary objective of this study was to develop a&#xa0;high-quality surface layer that exhibits enhanced heat oxidation resistance (scaling resistance) and high-temperature strength (creep strength). Evaluation of the phase composition and distribution of alloying elements within the coating, as well as analysis of the structural characteristics of the deposited layer was performed. The results indicate that the coatings formed on the steel surface are 2000–2250 µm thick and have a&#xa0;dendritic microstructure. According to X‑ray diffraction analysis, the dendrites consist of a&#xa0;γ-solid solution of Fe, Ni, and Cr. The oxidation resistance of the deposited layer was found to be approximately 15.5 times greater than that of the base 12Kh18N9T steel. Additionally, tensile tests conducted at 850 °C revealed that the strength of the coating is double that of the substrate material.</p>

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Microstructure and properties of nickel-based coatings deposited on 12Kh18N9T stainless steel

  • 期刊论文

  • 发表日期：

    2026年1月12日

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  • P. M. Petukhova,
  • E. G. Bushueva,
  • A. I. Popelukh,
  • R. R. Nurdinov,
  • I. P. Mishin

摘要

This paper presents a study on the structure and properties of coatings formed on 12Kh18N9T structural steel surfaces. Nickel-based powder compositions were deposited using a commercial ELV‑8 electron accelerator in an air atmosphere. The primary objective of this study was to develop a high-quality surface layer that exhibits enhanced heat oxidation resistance (scaling resistance) and high-temperature strength (creep strength). Evaluation of the phase composition and distribution of alloying elements within the coating, as well as analysis of the structural characteristics of the deposited layer was performed. The results indicate that the coatings formed on the steel surface are 2000–2250 µm thick and have a dendritic microstructure. According to X‑ray diffraction analysis, the dendrites consist of a γ-solid solution of Fe, Ni, and Cr. The oxidation resistance of the deposited layer was found to be approximately 15.5 times greater than that of the base 12Kh18N9T steel. Additionally, tensile tests conducted at 850 °C revealed that the strength of the coating is double that of the substrate material.