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Effect of chromium and nickel on the structure formation over the section of large forgings of Cr-Ni-Mo steels

  • Structural Steels
  • Published:
Metal Science and Heat Treatment Aims and scope

Conclusions

  1. 1.

    The dependences of the stability of supercooled austenite in continuous cooling in the temperature range of the pearlitic and bainitic transformations on the chromium and nickel content of the investigated steels are of a nonlinear nature with concentrational intervals of the strongest influence.

  2. 2.

    By computerized modeling we calculated the structural and temperature fields forming over the section of large forgings during quenching in oil, and the results of the calculation were generalized in the form of structural diagrams of the influence of chromium and nickel.

  3. 3.

    By varying the chromium and nickel content, structures of the same type can be obtained in forgings with specified diameter. The use of the presented structural diagrams provides for rational choice of material for forgings serving important purposes.

  4. 4.

    According to the data of the structural diagrams, chrome-nickel-molybdenum steels with 2% Cr and up to 1% Ni may be recommended as substitutes for high nickel steels for forgings with up to 800 mm diameter.

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Authors
  1. V. G. Sorokin
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  2. E. P. Vorob'eva
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  3. M. A. Gervas'ev
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  4. N. A. Adamova
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Additional information

Central Scientific-Research Institute of Metallurgy. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 9, pp. 16–19, September, 1988.

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Sorokin, V.G., Vorob'eva, E.P., Gervas'ev, M.A. et al. Effect of chromium and nickel on the structure formation over the section of large forgings of Cr-Ni-Mo steels. Met Sci Heat Treat 30, 661–665 (1988). https://doi.org/10.1007/BF00700357

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