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Heat treatment of low-alloy structural steel 25KhGMNTB

  • Heat Treatment Technology
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Metal Science and Heat Treatment Aims and scope

Conclusions

  1. 1.

    The T-T-T diagram for steel 25KhGMNTB is complex; the stability of austenite is high in the pearlitic range and especially in the range of 550°.

  2. 2.

    The best mechanical properties meeting the requirements for steels used for anchor chains with high strength can be obtained by means of the following heat treatment: normalization at 930° + quenching from the intercritical range of Ac1+(40–60°)+tempering at 600° and cooling in water.

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Literature Cited

  1. N. A. Polushkin et al., “Kinetics of decomposition of supercooled austenite in low-alloy structural steels,” in: Research and Development of Technological Processes in Shipbuilding and Overhauling [in Russian], No. 170, GIIVT, Gorki (1979), p. 3.

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  2. N. A. Polushkin et al., “Phase transformations during heat treatment of low-alloy structural steels,” in: Strength and Reliability of Machine Parts [in Russian], No. 162, part 1, GIIVT, Gorki (1978), p. 3.

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  3. A. M. Polyakova and V. D. Sadovskii, “Intercritical quenching of structural steels,” Metalloved. Term. Obrab. Met., No. 1, 5 (1970).

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  4. A. A. Astaf'ev et al., “Heat treatment of steel 10GN2MFA in the intercritical range,” in: Transactions of the Scientific-Research Institute of Heavy Machine Construction [in Russian], No. 255, Moscow (1977), p. 10.

  5. B. A. Marchenko, “Quenching of steels from intercritical temperatures,” Metalloved. Term. Obrab. Met., No. 3, 57 (1975).

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Authors
  1. N. A. Polushkin
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  2. S. N. Krasotskaya
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  3. V. P. Dmitriev
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  4. A. D. Klipov
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  5. Yu. N. Kalenikhin
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Additional information

Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 11, pp. 46–48, November, 1980.

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Polushkin, N.A., Krasotskaya, S.N., Dmitriev, V.P. et al. Heat treatment of low-alloy structural steel 25KhGMNTB. Met Sci Heat Treat 22, 835–838 (1980). https://doi.org/10.1007/BF00779439

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  • DOI: https://doi.org/10.1007/BF00779439

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