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Effect of nitrogen and heat treatment of the structure and properties of high-temperature steel 31Kh19N9MVBTL

  • High-Temperature Steels and Alloys
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Metal Science and Heat Treatment Aims and scope

Conclusions

  1. 1.

    Alloying steel 31Kh19N9MVBTL with 0.07–0.13% nitrogen excludes the possibility of forming σ-phase, causing embrittlement and leading to cracking, from ferrite.

  2. 2.

    Short-term and long-term strength characteristics for steel alloyed with nitrogen are 10–15% higher than for steel without nitrogen at normal and operating temperatures. Ductility and impact strength for steel with nitrogen, although somewhat lower than for steel without nitrogen, all the same satisfy the TU specifications.

  3. 3.

    Austenitizing at 1200–1220°C both for steel without nitrogen, and alloyed with nitrogen, provide higher mechanical properties than austenitizing at 1180°C.

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Literature cited

  1. Physicochemical Studies of Austenitic Alloys [in Russian], Mashgiz, Moscow (1957).

  2. G. I. Tsigel'nik and V. F. Anokhin, "Some structural factors affecting the quality of turbocompressor rotor wheels made of steel ÉI572", in: Experience of Creating Turbines and Diesels [in Russian], Sredne-Ural'skoe Knizhnoe Izd., Sverdlovsk (1969).

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  3. N. P. Aleksandrova and V. P. Abramova, "Effect of alloying with nitrogen on the structure and phase composition of cast high-temperature steel 35Kh19N9MVBTL", in: New Methods for Strengthening Cast Alloys [in Russian], IPL, Akad. Nauk UkrSSR, Kiev (1977).

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  4. N. P. Aleksandrova, M. P. Braun, L. K. Basenko, et al., "Improvement of steel strength characteristics by alloying with nitrogen and heat treatment", Tekhnol. Organizatsiya Proizvod., No. 2, 43 (1977).

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Authors
  1. N. P. Aleksandrova
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Additional information

Institute of Casting Problems, Academy of Sciences of the Ukrainian SSR, Kiev. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 2, pp. 34–37, February, 1986.

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Aleksandrova, N.P. Effect of nitrogen and heat treatment of the structure and properties of high-temperature steel 31Kh19N9MVBTL. Met Sci Heat Treat 28, 123–126 (1986). https://doi.org/10.1007/BF00717533

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  • DOI: https://doi.org/10.1007/BF00717533

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