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Kinetics of decomposition of the supercooled austenite of 32G2 steel during continuous and interrupted accelerated quenching

  • Heat-Treatment Technology
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Metal Science and Heat Treatment Aims and scope

Conclusions

  1. 1.

    Thermokinetic curves of the decomposition of supercooled austenite in continuous cooling drawn for 32G2 steel make it possible to predict with a sufficient degree of reliability the character of structure formation in hardening of pipe with selected cooling rates and to correct the heat-treatment operations of casing and drill pipe in relation to variations in the chemical analysis within specification limits.

  2. 2.

    The parameters of heat treatment of casing pipe of 32G2 steel using interrupted quenching cycles of quenching from the austenitizing temperature of 840–900°C to 400–500°C at a rate of not less than 40 deg/sec and then air cooling were established from the thermokinetic curves obtained of the decomposition of austenite cooled at different rates in different temperature ranges.

  3. 3.

    Experimental production testing of the heat treatment of casing pipe using the interrupted quenching cycle developed confirmed the basic possibility of obtaining properties of 32G2 steel conforming to strength group "E" without additional tempering.

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Literature cited

  1. K. F. Starodubov, Yu. P. Gul', Yu. A. Klyushnik, and V. V. Parusov, "The influence of production method on the kinetics of decomposition of the supercooled austenite of St3sp steel," Metalloved. Term. Obrab. Met., No. 11, 65 (1971).

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  2. Yu. P. Gul', V. S. Chmeleva, Yu. V. Yakubovich, et al., "Intensification of the hardening process of long cylindrical steel parts," Metalloved. Term. Obrab. Met., No. 1, 23–24 (1983).

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Authors
  1. Yu. P. Gul'
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  2. V. S. Chmeleva
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  3. M. F. Evsyukov
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  4. Yu. V. Yakubovich
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  5. V. K. Chernykh
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Additional information

Dnepropetrovsk Metallurgical Institute. Institute for Ferrous Metallurgy, Dnepropetrovsk. Taganrog Metallurgical Plant. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 3, pp. 6–9, March, 1985.

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Gul', Y.P., Chmeleva, V.S., Evsyukov, M.F. et al. Kinetics of decomposition of the supercooled austenite of 32G2 steel during continuous and interrupted accelerated quenching. Met Sci Heat Treat 27, 174–177 (1985). https://doi.org/10.1007/BF00699647

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  • DOI: https://doi.org/10.1007/BF00699647

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