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Computer analysis of thermal processes during quenching of steel

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

Conclusions

  1. 1.

    The temperature fields of cylindrical bodies in the process of quenching in a moving or still liquid under excess pressure were calculated on the basis of a mathematical model proposed earlier.

  2. 2.

    Analysis of the solutions obtained with the computer showed that during nucleate boiling the temperature on the surface of the cooled body changes negligibly, differing slightly from the saturation temperature of the cooling liquid, which makes it possible to control the boundary conditions by changing the pressure, i.e., slow down or speed up the transformation of austenite to martensite.

  3. 3.

    The change in the value of ξ0 can be neglected in simplified calculations, and it can be considered that the temperature on the surface is constant during nucleate boiling. This makes it possible to treat the experimental and theoretical data by means of the theory of normal thermal conditions. The data calculated by this method show that the generalized Biot number is a constant value that is independent of the dimensions of the cylinder and agrees with the experimental data.

  4. 4.

    The generalized Biot number can be used only in calculating the cooling time of different bodies. In calculating the temperature fields it is necessary to solve nonlinear boundary problems of thermal conductivity.

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Authors
  1. N. I. Kobasko
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Additional information

Institute of Technical Thermophysics, Academy of Sciences of the Ukrainian SSR. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 10, pp. 8–13, October, 1976.

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Kobasko, N.I. Computer analysis of thermal processes during quenching of steel. Met Sci Heat Treat 18, 846–852 (1976). https://doi.org/10.1007/BF00705187

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