Abstract
In this study, the effect of ultra-fast heating was achieved by adopting electromagnetic induction heat treatment technology, and the effects of traditional furnace heating and induction heating on the softening behavior of cold-rolled ribbed steel bars were investigated. The influence mechanism of different heating methods on the softening behavior of cold-rolled ribbed steel bars was clarified utilizing mechanical performance evaluation and multi-scale characterization. The results show that induction heating accelerates the softening process by promoting the movement of defects such as vacancies in the microstructure, the formation of substructures, and the movement and annihilation of dislocations, reducing the dislocation density, increasing the migration rate of grain boundaries, and accelerating the movement of the low angle grain boundaries into the high angle grain boundaries. The size of the recrystallized grains is controlled by the time of induction heating. This ensures the matching of high strength, high plasticity and high ductility of cold-rolled ribbed steel bars. This study provides a theoretical basis for the application and promotion of ultra-fast heating.
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J.G.H. was involved in methodology, writing—original draft. H.Y. contributed to conceptualization, supervision. K.W. was involved in validation. B.C.H. contributed to writing—review and editing. S.Y.L. was involved in auxiliary experiment.
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Han, J., Yu, H., Wang, K. et al. Study of the softening behavior of cold-rolled ribbed steel bars under ultra-fast heating. J Mater Sci 58, 17873–17889 (2023). https://doi.org/10.1007/s10853-023-09127-6
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DOI: https://doi.org/10.1007/s10853-023-09127-6