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<p><b>Abstract</b>—The chemical and phase compositions, structure and mechanical properties of an alloy based on the NiAl—Cr—Co system (base–2.5Mo–1.5Re–1.5Ta–0.2Ti) obtained by centrifugal SHS casting in a pilot industrial plant have been studied. The results of the study were analyzed in comparison with similar parameters for an alloy of the same composition, but synthesized in a laboratory SHS plant and having a smaller mass of 0.8 ± 0.1 kg as compared to the mass of a large-sized ingot of 4.7 ± 0.1 kg. The large-sized ingot with chemical and phase compositions uniform by volume is reported to have been produced, its metal demonstrating similar kinetics and heat resistance at 1150°C (30 h) at different distances from the center. It was found that the heat resistance of the alloy decreased with ingot mass increasing from 55 ± 3 g/m<sup>2</sup> for the laboratory ingot to 19 ± 3 g/m<sup>2</sup> for the large ingot. The strength properties of the metal of the large ingot during compression testing were <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11505_2025_11922_Article_IEq1.gif" Format="GIF" Height="18" Rendition="HTML" Resolution="72" Type="Linedraw" Width="18" /> </InlineMediaObject> <EquationSource Format="TEX">\(\sigma _{{\text{u}}}^{{\text{c}}}\)</EquationSource> <!--RusMet2570004Sanin-m1--> </InlineEquation> = 1662 ± 10 MPa, <InlineEquation ID="IEq2"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11505_2025_11922_Article_IEq2.gif" Format="GIF" Height="18" Rendition="HTML" Resolution="72" Type="Linedraw" Width="26" /> </InlineMediaObject> <EquationSource Format="TEX">\(\sigma _{{0.2}}^{{\text{c}}}\)</EquationSource> <!--RusMet2570004Sanin-m2--> </InlineEquation> = 1531 ± 25 MPa and during tensile testing σ<sub>u</sub> = 293 ± 10 MPa, σ<sub>0.2</sub> = 236 ± 5 MPa, which was practically no different from the properties of the laboratory ingot. The mechanical properties of NiA–Cr–Co-based alloys of various alloying systems synthesized by the SHS method with subsequent use of special metallurgy methods are also given.</p>

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Effect of Scale Factor on the Structure and Mechanical Properties of Nickel β-Alloy Produced by Centrifugal SHS Casting

  • 期刊论文

  • 发表日期：

    2025年3月1日

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  • V. V. Sanin,
  • M. I. Ageev,
  • D. A. Martynov,
  • V. N. Sanin,
  • E. A. Levashov

摘要

Abstract—The chemical and phase compositions, structure and mechanical properties of an alloy based on the NiAl—Cr—Co system (base–2.5Mo–1.5Re–1.5Ta–0.2Ti) obtained by centrifugal SHS casting in a pilot industrial plant have been studied. The results of the study were analyzed in comparison with similar parameters for an alloy of the same composition, but synthesized in a laboratory SHS plant and having a smaller mass of 0.8 ± 0.1 kg as compared to the mass of a large-sized ingot of 4.7 ± 0.1 kg. The large-sized ingot with chemical and phase compositions uniform by volume is reported to have been produced, its metal demonstrating similar kinetics and heat resistance at 1150°C (30 h) at different distances from the center. It was found that the heat resistance of the alloy decreased with ingot mass increasing from 55 ± 3 g/m2 for the laboratory ingot to 19 ± 3 g/m2 for the large ingot. The strength properties of the metal of the large ingot during compression testing were \(\sigma _{{\text{u}}}^{{\text{c}}}\) = 1662 ± 10 MPa, \(\sigma _{{0.2}}^{{\text{c}}}\) = 1531 ± 25 MPa and during tensile testing σu = 293 ± 10 MPa, σ0.2 = 236 ± 5 MPa, which was practically no different from the properties of the laboratory ingot. The mechanical properties of NiA–Cr–Co-based alloys of various alloying systems synthesized by the SHS method with subsequent use of special metallurgy methods are also given.