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<p>By the method of nonvacuum electron-beam surfacing on carbon-steel substrates, we obtained a&#xa0;coating based on a&#xa0;high-entropy CoCrFeMnNi alloy reinforced with NbC particles. We studied the effects of annealing and quenching with subsequent artificial aging on the microstructures of the deposited layers, their elemental and phase compositions, and their mechanical properties. After surfacing, the structure of the samples is represented by the FCC phase corresponding to the CoCrFeMnNi alloy and NbC carbide particles. The procedure of thermal treatment leads to a&#xa0;decrease in texture and to the release of Me<sub>23</sub>C<sub>6</sub>-type carbides. The maximum microhardness (313±10HVV<sub>0.1</sub>) is achieved as a&#xa0;result of quenching of the samples in water from 1100 °C with subsequent aging. The wear resistance of the coating layers after different procedures of heat treatment became 2–4 times higher than for the untreated material.</p>

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Influence of heat treatment on the structure and properties of CoCrFeMnNi + NbC coatings obtained by nonvacuum electron-beam surfacing

  • 期刊论文

  • 发表日期：

    2025年5月1日

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  • A. B. Yurgin,
  • A. A. Ruktuev,
  • N. V. Stepanova,
  • A. E. Riznitsky,
  • D. V. Khudyakov,
  • I. A. Bataev

摘要

By the method of nonvacuum electron-beam surfacing on carbon-steel substrates, we obtained a coating based on a high-entropy CoCrFeMnNi alloy reinforced with NbC particles. We studied the effects of annealing and quenching with subsequent artificial aging on the microstructures of the deposited layers, their elemental and phase compositions, and their mechanical properties. After surfacing, the structure of the samples is represented by the FCC phase corresponding to the CoCrFeMnNi alloy and NbC carbide particles. The procedure of thermal treatment leads to a decrease in texture and to the release of Me23C6-type carbides. The maximum microhardness (313±10HVV0.1) is achieved as a result of quenching of the samples in water from 1100 °C with subsequent aging. The wear resistance of the coating layers after different procedures of heat treatment became 2–4 times higher than for the untreated material.