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Tempering of the bainitic structure

  • Theory
  • Published:
Metal Science and Heat Treatment Aims and scope

Conclusions

  1. 1.

    Decomposition of supercooled austenite in the upper temperature range of the bainitic transformation leads to formation of structures with a stable system of defects that determine the thermal stability of upper bainite during subsequent heating.

  2. 2.

    Upper bainite is highly resistant to recrystallization in comparison with martensite, which is characteristic of polygonized structures.

  3. 3.

    The thermal stability of upper bainite is manifest as high stability of retained austenite and retention of rather large quantities of austenite after prolonged high-temperature tempering.

  4. 4.

    The structural characteristics of upper bainite have a substantial effect on the mechanical properties of steel after high-temperature tempering.

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Literature cited

  1. V. D. Sadovskii, Structural Inheritance in Steel [in Russian], Metallurgiya, Moscow (1973).

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  2. V. D. Sadovskii, "Some unresolved problems concerning the structural mechanism of austenite formation during heating of steel", in: Structural Mechanism of Phase Transformations in Metals and Alloys [in Russian], Nauka, Moscow (1976), p. 6.

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  3. V. D. Sadovskii and N. P. Chuprakova, "Effect of heat treatment on the quantity of retained austenite and its decomposition during tempering of structural Cr−Ni steels,", in: Transactions of the Ural Branch of the Academy of Sciences USSR [in Russian], No. 10, Sverdlovsk (1941), p. 139.

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  5. I. N. Kidin, M. A. Shteremel', and V. I. Lizunov, "The displacement mechanism of the polymorphous transformation during heating of annealed chromium iron", Fiz. Met. Metalloved., No. 21, 594 (1966).

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Authors
  1. A. Sh. Shneiderman
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Additional information

V. I. Lenin Elektrotyazhmash Factory, Kharkov. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 12, pp. 2–5, December, 1978.

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Shneiderman, A.S. Tempering of the bainitic structure. Met Sci Heat Treat 20, 971–974 (1978). https://doi.org/10.1007/BF00703268

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  • DOI: https://doi.org/10.1007/BF00703268

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