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The chemical composition, macroPhysical-mechanical properties-, and microstructureMicrostructure of the experimental heat-resistant cast alloy have been studied. A fractographic study of the samples fracture structure was carried out. The modifying effect of titanium carbonitrideTitanium carbonitride ultrafine powderUltrafine powder on the dendritic structure, distribution, and change in the morphologyMorphologies of primary carbides, the number, and distribution of carbonitride particles has been established. It is shown that the use of ultrafine titanium carbonitrideTitanium carbonitride powders for modificationModification of the heat-resistant nickelNickel alloy ЖС3ДК-ВІ makes it possible to increase the mechanical and heat-resistant propertiesHeat-Resistant Properties of the material. Increasing of the modifier amount promotes grain refinementGrain refinement. More stable properties and favorable structure are provided by melt modificationModification with ultrafine Ti(C, N) particles in the form of briquettesBriquette. It was found that modificationModification with Ti(C, N) powder leads to a decrease in the impact toughness values due to the formation of boundary microporosity.

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Heat-Resistant Nickel Alloy ЖС3ДК-ВI Modification with Titanium Carbonitride Ultrafine Powders

  • 会议论文

  • 发表日期：

    2025年

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  • Dmytro Tomkin,
  • Sergey Danilov,
  • Oleksii Pedash,
  • Olena Naumyk,
  • Valeriy Naumyk

摘要

The chemical composition, macroPhysical-mechanical properties-, and microstructureMicrostructure of the experimental heat-resistant cast alloy have been studied. A fractographic study of the samples fracture structure was carried out. The modifying effect of titanium carbonitrideTitanium carbonitride ultrafine powderUltrafine powder on the dendritic structure, distribution, and change in the morphologyMorphologies of primary carbides, the number, and distribution of carbonitride particles has been established. It is shown that the use of ultrafine titanium carbonitrideTitanium carbonitride powders for modificationModification of the heat-resistant nickelNickel alloy ЖС3ДК-ВІ makes it possible to increase the mechanical and heat-resistant propertiesHeat-Resistant Properties of the material. Increasing of the modifier amount promotes grain refinementGrain refinement. More stable properties and favorable structure are provided by melt modificationModification with ultrafine Ti(C, N) particles in the form of briquettesBriquette. It was found that modificationModification with Ti(C, N) powder leads to a decrease in the impact toughness values due to the formation of boundary microporosity.