| Effects of Cerium on Microalloying in Low Sulfur Nb-Ti-Bearing Steel |
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| 作者姓名： | 朱兴元 游涛 石勤 邹洋 林勤 |
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| 作者单位： | [1]School of Material Science and Engineering, Wuhan University of Technology, Wuhan Hubei 430070, China [2]Wuhan Engineering Institute, Wuhan Hubei 430080 [3]Department of Physical Chemistry, University of Science and Technology Beijing , Beijing 100083, China |
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| 基金项目： | Project supported by the National Items of 10.5 Project |
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| 摘 要： | The CCT curves of supercooled austenite were investigated by using THERMECMASTOR-Z simulation machine, test samples refined from 50 kg vacuum induction furnace and two-stage controlled roiling in laboratorial condition. Test results show that influence of cerium （Ce） addition in low sulfur Nb-Ti-Bearing steel is as follows： Ce can increase the transformation point tara and tAr1, enlarge the interval of transformation （tAr3-tAr1） . Ce moves CCT and rightwards , and reduces hardenability. Ce increases bainitic transformation temperature and enlarges curves upwards interval of bainite formation. With higher cooling rates, Ce changes the martensite from coarse strip to fine strip. It decreases Ms, enhances the trend of lath martensitic structure and limits the formation of lamellar crystal.
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| 关 键 词： | 轴承钢 稀土 结构 相变 Nb-Ti微合金钢 铈 |
| 文章编号： | 1002-0721（2005）06-0742-05 |
| 收稿时间： | 2005-04-10 |
| 修稿时间： | 2005-06-15 |
Effects of Cerium on Microalloying in Low Sulfur Nb-Ti-Bearing Steel |
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| Zhu Xingyuan,You Tao,Shi Qin,Zou Yang,Lin Qin.Effects of Cerium on Microalloying in Low Sulfur Nb-Ti-Bearing Steel[J].Journal of Rare Earths,2005,23(6):742-746. |
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| Authors: | Zhu Xingyuan You Tao Shi Qin Zou Yang Lin Qin |
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| Abstract: | The CCT curves of supercooled austenite were investigated by using THERMECMASTOR-Z simulation machine, test samples refined from 50 kg vacuum induction furnace and two-stage controlled rolling in laboratorial condition.Test results show that influence of cerium (Ce) addition in low sulfur Nb-Ti-Bearing steel is as follows: Ce can increase the transformation point tAr3 and tAr1, enlarge the interval of transformation (tAr3-tAr1). Ce moves CCT curves upwards and rightwards, and reduces hardenability. Ce increases bainitic transformation temperature and enlarges interval of bainite formation. With higher cooling rates, Ce changes the martensite from coarse strip to fine strip. It decreases Ms, enhances the trend of lath martensitic structure and limits the formation of lamellar crystal. |
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| Keywords: | Nb-Ti-Bearing steel structure phase transformation rare earths |
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