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Beneficial effect of B on hot ductility of 20CrMnTi steel with 0.05% Sn
Published online by Cambridge University Press: 04 July 2014
Abstract
The beneficial effect of B on the hot ductility of 20CrMnTi steel with 0.05% Sn was investigated. The results show that there is a trough in the hot ductility-temperature curve. With the increase in the B content, the trough shifts to a lower temperature and becomes shallow, and the hot brittle range becomes narrow. In addition, B greatly enhancing the hot ductility was due mainly to its suppressing the Sn segregation, retarding the austenite/ferrite deformation, accelerating the onset of dynamic recrystallization (DRX) and promoting the intragranular nucleation of ferrite. Moreover, in the present case, adding 92 ppm B can nucleation of ferrite. Moreover, in the present case, adding 92 ppm B can obtain the best effect in improving the hot ductility of 20CrMnTi steel with 0.05% Sn.
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- © EDP Sciences 2014
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