Conclusion
Microalloying with vanadium (0.1%) of 70 carbon steel makes it possible to decrease its tendency toward fracture by separation into layers both after cold drawing and after subsequent low-temperature tempering. In addition the positive influence of vanadium microaddition appears only after deformation with not very high degrees — with ε>80% the tendency toward separation by layers may be preserved.
The positive effect of vanadium microalloying is caused by retarding of the process of decomposition of cementite in drawing of patented wire and making difficult the development of strain aging, influencing the intensity of growth of cracks formed in deformation.
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Literature cited
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V. N. Gridnev, V. G. Gavrilyuk, V. V. Nemoshkalenko, et al., ”The influence of alloy elements on the decomposition of cementite in plastic deformation,” Dokl. Akad. Nauk SSSR,236, No. 4, 857–860 (1977).
Additional information
Ural Polytechnic Institute. All-Union Scientific-Research Institute for Metal Parts. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 9, pp. 11–13, September, 1991.
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Baraz, V.R., Sokolov, A.A., Ishina, E.A. et al. Influence of vanadium on features of the fracture of high-strength steel wire. Met Sci Heat Treat 33, 663–666 (1991). https://doi.org/10.1007/BF00811727
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DOI: https://doi.org/10.1007/BF00811727