| 稀土元素对重轨钢动态再结晶和珠光体片间距的影响 |
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| 引用本文： | 包喜荣,陈林,郭亚鹏.稀土元素对重轨钢动态再结晶和珠光体片间距的影响[J].钢铁,2012,47(6):76-78,87. |
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| 作者姓名： | 包喜荣 陈林 郭亚鹏 |
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| 作者单位： | 内蒙古科技大学材料与冶金学院,内蒙古包头,014010 |
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| 摘 要： | 应用Gleeble-1500D热模拟试验机对重轨钢BNbRE和U71Mn进行单道次压缩试验,测定850～1 150℃下的真应力-真应变曲线,研究不同终轧温度和稀土元素对重轨钢动态再结晶的影响,并用扫描电镜观察变形后空冷的显微组织。结果表明,稀土元素能显著地抑制形变奥氏体的动态再结晶并细化珠光体片层间距。因此,稀土元素可抑制重轨钢动态再结晶,使其在较高终轧温度下仍能得到细小均匀的显微组织。
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| 关 键 词： | 稀土元素 重轨钢 动态再结晶 珠光体片间距 |
Effect of RE on Dynamic Recrystallization and Pearlite Spacing of Heavy Rail Steel |
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| BAO Xi-rong,CHEN Lin,GUO Ya-peng.Effect of RE on Dynamic Recrystallization and Pearlite Spacing of Heavy Rail Steel[J].Iron & Steel,2012,47(6):76-78,87. |
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| Authors: | BAO Xi-rong CHEN Lin GUO Ya-peng |
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| Affiliation: | (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 1 150 ℃ 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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| Keywords: | RE heavy rail steel dynamic recrystallization pearlite spacing |
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