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Transformation of austenite into granular pearlite in carbon and alloy steels

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

Conclusions

  1. 1.

    A granular pearlite structure in steel may be obtained directly from homogeneous austenite during isothermal decomposition after previously thermally cycling it at temperatures of the subcritical region.

  2. 2.

    During thermal cycling, alternating thermal stresses of considerable absolute value arise in austenite, and this leads to its plastic deformation. During plastic (thermoplastic) deformation of homogeneous austenite, even with small degrees (up to 1%) preceding eutectoid transformation, conditions are also created for transformation (a typical dislocation structure) with which the energy factor prevails over the kinetic factor, and decomposition of homogeneous austenite is realized with formation of a granular pearlite structure.

  3. 3.

    By means of TCT in the stream of a rolling mill it is possible to obtain a finely dispersed granular pearlite structure in rolled material 6.5–18 mm in diameter. Use of this rolled material makes it possible, as a result of shortening the duration or completely excluding the spheroidizing anneal, to simplify the production cycle of tool wire and gauge steel for cold upsetting.

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Authors
  1. V. V. Parusov
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  2. I. I. Dolzhenkov
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  3. V. I. Sukhomlin
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Additional information

Institute of Ferrous Metallurgy, Dnepropetrovsk. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 6, pp. 6–11, June, 1985.

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Parusov, V.V., Dolzhenkov, I.I. & Sukhomlin, V.I. Transformation of austenite into granular pearlite in carbon and alloy steels. Met Sci Heat Treat 27, 402–407 (1985). https://doi.org/10.1007/BF00693277

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  • DOI: https://doi.org/10.1007/BF00693277

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