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Structure and properties of martensitic-aged corrosion resistant steels containing various concentrations of cobalt

  • Maraging Steels
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Metal Science and Heat Treatment Aims and scope

Conclusions

  1. 1.

    The addition of Co to corrosion resistance martensitic-aged steel 03Cr9N9Mo3 leads to an increase in the amount of residual austenite in its structure (to a lesser degree in the quenched state and to a larger degree after aging). There is also an increase in the martensitic aging process.

  2. 2.

    It is necessary to increase the Co concentration to no less than 10% in order to ensure the stability of residual austenite at low temperatures in the strengthened state (after aging).

  3. 3.

    As the Co concentration increases from 0 to 10% the strength of the steel after aging increases from 1220 to 1380 N/mm2 while adequate levels of ductility and impact strength are maintained.

  4. 4.

    At a Co concentration of 5% the hydrogen embrittlement resistance is at a minimum, but as the Co concentration increases to 8–10% it increases to a level characteristic of steels without Co.

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Literature cited

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Authors
  1. N. A. Sorokina
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  2. N. A. Pavlenko
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  3. N. V. Andrushova
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  4. O. B. Belyakova
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  5. Yu. I. Rusinovich
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Additional information

I. P. Bardin Central Scientific-Research Institute of Ferrous Metallurgy. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 8, pp. 36–39, August, 1990.

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Sorokina, N.A., Pavlenko, N.A., Andrushova, N.V. et al. Structure and properties of martensitic-aged corrosion resistant steels containing various concentrations of cobalt. Met Sci Heat Treat 32, 598–602 (1990). https://doi.org/10.1007/BF00700713

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  • DOI: https://doi.org/10.1007/BF00700713

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