Conclusions
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1.
Preliminary cold plastic deformation accelerates saturation with carbon under certain carburizing conditions.
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2.
The effect is maximum with 25% deformation. The results obtained are confirmed by limited-area spectral analysis, microstructural analysis, electron microscopic examination, and by the change in hardness.
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2.
It was found that the acceleration of carburizing as the result of preliminary plastic deformation is not connected with the surface finish.
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3.
It is proposed that the acceleration of the saturation process after 25% deformation is due to the formation of a stable polygonal structure that is retained after the α→γ transformation during heating for carburizing and with changes in the process of adsorption and chemisorption on the surface of the metal due to particular characteristics of the polygonal structure.
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Additional information
There have been other theoretical explanations of the effect besides the one presented in this article.
Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 12, pp. 22–26, December, 1971.
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Lakhtin, Y.M., Kal'ner, V.D., Sedunov, V.K. et al. Effect of preliminary cold deformation on carburizing of steel. Met Sci Heat Treat 13, 1016–1020 (1971). https://doi.org/10.1007/BF00664996
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DOI: https://doi.org/10.1007/BF00664996