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Effect of aging before repeated cold treatment on the mechanical properties of steel N26T

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Metal Science and Heat Treatment Aims and scope

Conclusions

  1. 1.

    After the complete heat-treatment cycle the strength characteristics of low-carbon steel N26T increase substantially (∼15–20%) after cold treatment due to two additional operations — intermediate aging at a temperature below Af and a second cold treatment.

  2. 2.

    The mechanical properties of the steel vary with the intermediate-aging temperature and improve as the temperature is raised from 500 to 625°.

  3. 3.

    Intermediate aging at temperatures below Af induces destabilization of austenite and increases (∼12%) the amount of α phase formed during the subsequent cold treatment.

  4. 4.

    The low strength characteristics after austenitizing at 720° are evidently due to the mutual effects of the two strengthening mechanisms — phase strain hardening and aging. The first mechanism is predominant at temperatures below 700°, and the second at higher temperatures.

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Literature cited

  1. V. G. Gorbach, "Phase strain hardening during the γ→α→γ transformations," in: Metal Physics [in Russian], No. 27, Naukova Dumka, Kiev (1970), p. 3.

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  2. G. Krauss, Trans. Met. Soc. AIME,224, No. 6, 1212 (1962).

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Authors
  1. S. V. Dianov
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  2. V. A. Radchenko
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  3. V. A. Rudman
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  4. V. P. Severinov
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Additional information

Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 6, pp. 59–61, June, 1980.

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Dianov, S.V., Radchenko, V.A., Rudman, V.A. et al. Effect of aging before repeated cold treatment on the mechanical properties of steel N26T. Met Sci Heat Treat 22, 454–457 (1980). https://doi.org/10.1007/BF00693656

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  • DOI: https://doi.org/10.1007/BF00693656

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