Conclusions
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1.
For precipitation-hardening nickel alloy KhN60MKB YuT σb≥40 kg/mm2 and δ≥20% at 1000°. The plasticity of the alloy permits forging of large disks up to 300 mm in diameter.
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2.
The anisotropy of the mechanical properties is low and the density of electron vacancies (Nv=1.9) is below the level inducing precipitation of embrittling phases of the σ and μ types. This feature increasec the plasticity of the alloy at room and operating temperatures.
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3.
The heat resistance of alloy KhN60MKB YuT is satisfactory at 950–1000°.
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Literature cited
W. H. Sharp, Heat Resistant Materials [Russian translation], Metallurgiya, Moscow (1969), p. 40.
I. N. Golikov, Dendritic Segregation in Steel [in Russian], Metallurgiya, Moscow (1958), p. 24.
A. R. Krylova et al., “Prolonged oxidation of standard heat-resistant steels and alloys KhN78T, KhN70 Yu, KhN60 Yu, and Kh25N20S2 at 1150 and 1200°C,“ in: Special Steels and Alloys [in Russian], No. 52, Metallurgiya, Moscow (1967), p. 113.
I. L. Mirkin, “Relationship between the basic heat resistance properties of alloys and quantitative aspects of the microstructure,“ in: Structure and Properties of Heat Resistant Metallic Materials [in Russian], Metallurgiya, Moscow (1970), p. 32.
Additional information
Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 10, pp. 61–63, October, 1976.
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Budueva, V.G., Bulavina, L.S. & Rastorgueva, I.A. Heat-resistant nickel-base alloy KhN60MKB YuT (ÉP879). Met Sci Heat Treat 18, 902–904 (1976). https://doi.org/10.1007/BF00705204
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DOI: https://doi.org/10.1007/BF00705204