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| Effect of RE on Dynamic Recrystallization and Pearlite Spacing of Heavy Rail Steel |
| BAO Xi-rong,CHEN Lin,GUO Ya-peng |
| School of Material and Metallurgy, Inner Mongolia University of Science and Technology, Baotou 014010, Nei Monggol, China |
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Abstract The ture stress-strain curves of BNbRE and U71Mn heavy rails from 850 to 1150℃ were measured by one-pass compression tests on Gleeble-1500D. The effects of finishing temperatures and RE on dynamic recrystallization were investigated. The air cooled microstructures after deformation were observed by SEM. The results show that dynamic recrystallization of deforming austenite being rolled can be prohibited significantly by adding RE and the finer spacing of pearlite is obtained. Therefore, fine and uniform microstructures can be obtained at higher finishing temperature by adding RE.
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Received: 11 March 2011
Published: 27 June 2012
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2012, Vol. 47 
