Conclusions
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1.
The variation in the amount of Widmannstatten ferrite with the cooling rate in carbon steels 20, 35, and 45 has an extremal character, and with a large amount of carbon in the steel the peak corresponds to low cooling rates.
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2.
An increase in the carbon content of the steel favors the formation of Widmannstatten structure with slow cooling (≤15 deg/min), but with more rapid cooling leads to a decrease in the amount of acicular ferrite.
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Literature cited
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B. A. Leont'ev and T. I. Shelyagina, "Conditions for formation of Widmannstatten structure in steel," in: Metal Science and Heat Treatment [in Russian], No. 15, Vysshaya Shkola, Moscow (1969), p. 85.
Additional information
Zhdanov Metallurgical Institute. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 6, pp. 59–60, June, 1973.
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Leont'ev, B.A., Kosenko, A.P. Formation of Widmannstatten structure in carbon steels. Met Sci Heat Treat 15, 511–512 (1973). https://doi.org/10.1007/BF01153279
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DOI: https://doi.org/10.1007/BF01153279