Beneficial effect of B on hot ductility of 20CrMnTi steel with 0.05% Sn. Issue 4 (4th July 2014)

• Record Type: Journal Article
• Authors: Peng, Hongbing; Chen, Weiqing; Chen, Lie; Guo, Dong
• Is Part Of: Metallurgical research & technology. Volume 111:Issue 4(2014)
• Page Start: 221
• Page End: 227
• Publication Date: 2014-07-04
• Subjects: Boron, -- tin, -- hot ductility, -- 20CrMnTi steel; Metallurgical research -- Periodicals; Metallurgy -- Periodicals; 669.05
• DOI: 10.1051/metal/2014027
• Languages: English
• ISSNs: 2271-3646

Abstract

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.