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Computer-aided evaluation of quenching intensity and prediction of hardness distribution

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Journal of Heat Treating

Abstract

A new computer-aided method is described for measuring and recording quenching intensity under workshop conditions using a special cylindrical probe. The method is based on measuring the temperature gradient at the probe surface and representing the quenching intensity as heat flux density. The method is applicable for different quenchants, quenching conditions, and quenching techniques, and enables the comparison of the real quenching intensity among them. The technique is sensitive enough to reflect a change in each quenching parameter.

A test specimen made of the steel grade of interest is hardened under the same quenching conditions as round bars of different diameters made of the same steel grade, in order to predict the hardness distribution across such bars. This computer-aided prediction is based on Jominy hardenability data, quenching intensity characteristics, and hardness distribution data obtained by quenching test specimens—all stored in the computer memory. Using equations from a regression analysis of Crafts-Lamont diagrams, software was developed for precise prediction of the hardness distribution in quenched bars. Predicted values are compared with experimentally obtained results.

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References

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Authors and Affiliations

  1. Department of Materials Science, Mechanical Engineering and Naval Architecture of the University of Zagreb, Djure Salaja Street 1, 41001, Zagreb, Yugoslavia

    B. Liscic (full professor) & T. Filetin (Faculty member)

Authors
  1. B. Liscic
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  2. T. Filetin
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Liscic, B., Filetin, T. Computer-aided evaluation of quenching intensity and prediction of hardness distribution. J. Heat Treating 5, 115–124 (1988). https://doi.org/10.1007/BF02833177

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  • DOI: https://doi.org/10.1007/BF02833177

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