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<p>An improved technology for manufacturing cast blades made of the ZhS3DK-VI alloy for modern aircraft engines is proposed, which includes high-temperature treatment of the melt at 1650-1670 °C, comprehensive modification of the ZhS3DK-VI alloy with titanium carbonitride, nickel-yttrium alloy, and cobalt aluminate (surface treatment), followed by hot isostatic pressing (HIP) and standard heat treatment. It was established that the chemical composition of the castings meets the requirements of OST 1.90.126-85, taking into account the presence of yttrium. The average angle in bending tests of blades is 120°. No cracks were detected at the bend. It was established that comprehensive alloy modification promotes grain refinement. The microstructure of the blades and specimens corresponds to the normal heat-treated condition of the ZhS3DK-VI alloy. After HIP, microporosity in the structure is practically absent, thereby stabilizing and improving the material's properties. The mechanical and heat-resistant properties after HIP and standard heat treatment are satisfactory and meet the requirements of OST 1.90.126-85. The impact toughness values of the specimens range from 60.0 to 67.5 J/cm<sup>2</sup> and also meet the additional requirements of modern aircraft engine designers. The longterm strength of the comprehensively modified ZhS3DK-VI alloy is approximately 9.5 times the required level. Thus, the high-temperature treatment of the melt and comprehensive modification during ZhS3DK-VI alloy smelting, followed by HIP and standard heat treatment of finished cast rotor blades, ensure the formation of a more favorable structure and significantly better mechanical and heat-resistant properties of the material.</p>

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Improved Technology for Manufacturing Cast Blades Made of the ZhS3DK-VI Alloy for Modern Aircraft Engines

  • 期刊论文

  • 发表日期：

    2026年5月29日

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  • D. O. Tyomkin,
  • O. O. Pedash,
  • S. M. Danilov,
  • O. O. Naumyk,
  • V. V. Naumyk

摘要

An improved technology for manufacturing cast blades made of the ZhS3DK-VI alloy for modern aircraft engines is proposed, which includes high-temperature treatment of the melt at 1650-1670 °C, comprehensive modification of the ZhS3DK-VI alloy with titanium carbonitride, nickel-yttrium alloy, and cobalt aluminate (surface treatment), followed by hot isostatic pressing (HIP) and standard heat treatment. It was established that the chemical composition of the castings meets the requirements of OST 1.90.126-85, taking into account the presence of yttrium. The average angle in bending tests of blades is 120°. No cracks were detected at the bend. It was established that comprehensive alloy modification promotes grain refinement. The microstructure of the blades and specimens corresponds to the normal heat-treated condition of the ZhS3DK-VI alloy. After HIP, microporosity in the structure is practically absent, thereby stabilizing and improving the material's properties. The mechanical and heat-resistant properties after HIP and standard heat treatment are satisfactory and meet the requirements of OST 1.90.126-85. The impact toughness values of the specimens range from 60.0 to 67.5 J/cm2 and also meet the additional requirements of modern aircraft engine designers. The longterm strength of the comprehensively modified ZhS3DK-VI alloy is approximately 9.5 times the required level. Thus, the high-temperature treatment of the melt and comprehensive modification during ZhS3DK-VI alloy smelting, followed by HIP and standard heat treatment of finished cast rotor blades, ensure the formation of a more favorable structure and significantly better mechanical and heat-resistant properties of the material.