| 铈及混合稀土对Fe-36Ni低膨胀合金凝固组织的影响 |
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| 引用本文： | 于彦冲,陈伟庆,郑宏光. 铈及混合稀土对Fe-36Ni低膨胀合金凝固组织的影响[J]. 中国稀土学报, 2012, 30(2): 175-180 |
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| 作者姓名： | 于彦冲 陈伟庆 郑宏光 |
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| 作者单位： | 1. 钢铁冶金新技术国家重点实验室,北京科技大学冶金与生态工程学院,北京100083
2. 宝钢研究院冶金工艺所,上海,201900 |
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| 摘 要： | 研究了Ce及混合稀土对Fe-36Ni低膨胀合金凝固组织的影响,结果表明:加Ce或者混合稀土处理后,合金中分别形成了大量高熔点的Ce2O3颗粒和(Ce,La)2O2S复合第二相颗粒,错配度理论计算表明,Ce2O3,Ce2O2S和La2O2S的(0001)面与Fe-36Ni的(100)面分别具有6.21%,5.77%和5.42%的较低错配度,因此Ce2O3和(Ce,La)2O2S可以作为有效的非均质形核核心,使凝固组织的等轴晶比例增加,等轴晶尺寸减小,合金凝固组织得到显著细化。
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| 关 键 词： | Fe-36Ni低膨胀合金 铈 混合稀土 凝固组织 错配度 |
Effect of Cerium and Mischmetal on Solidification Structure of Fe-36Ni Invar Alloy |
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| Yu Yanchong , Chen Weiqing , Zheng Hongguang. Effect of Cerium and Mischmetal on Solidification Structure of Fe-36Ni Invar Alloy[J]. Journal of the Chinese Society of Rare Earths, 2012, 30(2): 175-180 |
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| Authors: | Yu Yanchong Chen Weiqing Zheng Hongguang |
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| Affiliation: | 1.State Key Laboratory of Advanced Metallurgy,School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China;2.Technology Institute of Metallurgical,Baosteel Institute,Shanghai 201900,China) |
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| Abstract: | The effect of Ce and mischmetal on the solidification structure of Fe-36Ni invar alloy was investigated.The results showed that the great amount of high-melting point compounds(Ce2O3) and mixed secondary phase compounds((Ce,La)2O2S) formed in the alloy with addition of Ce or mischmetal respectively.Based on the theory of lattice misfit,the lattice misfit between(0001) surface of Ce2O3,Ce2O2S,La2O2S and(100) surface of Fe-36Ni invar alloy was 6.21%,5.77% and 5.42% respectively,which was relatively low.Therefore,Ce2O3 and(Ce,La)2O2S could serve as the core of heterogeneous nucleation,improve the equiaxed grain ratio,and reduce the equiaxed grain size and refine the solidification structure of alloy. |
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| Keywords: | Fe-36Ni invar alloy cerium mischmetal solidification structure lattice misfit |
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