| 稀土Ce对253MA耐热钢凝固组织及夹杂物的影响 |
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| 引用本文： | 杨礼林,齐建波,赵莉萍,贾永杰.稀土Ce对253MA耐热钢凝固组织及夹杂物的影响[J].金属热处理,2020,45(1):26-30. |
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| 作者姓名： | 杨礼林 齐建波 赵莉萍 贾永杰 |
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| 作者单位： | 1. 内蒙古自治区新金属材料重点实验室, 内蒙古 包头 014010;2. 内蒙古科技大学 材料与冶金学院, 内蒙古 包头 014010 |
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| 基金项目： | 内蒙古科技大学创新基金 |
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| 摘 要： | 采用激光共聚焦显微镜、场发射扫描电镜(SEM)和电子背散射衍射(EBSD)等设备,对含稀土Ce的耐热钢253MA连铸坯的凝固组织及夹杂物的形貌、成分和结构进行表征分析。结果表明:比较两种含稀土Ce耐热钢的凝固组织,稀土Ce有增大凝固组织等轴晶率、细化柱状晶的作用;稀土Ce夹杂物主要相结构为CeO2和(CeO)2SO4,呈细小、近球形弥散分布;对夹杂物进行统计和评级,发现稀土Ce含量的增加有利于D类球形夹杂物增多,有助于提高耐热钢的耐高温、抗氧化性能。
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| 关 键 词： | 稀土Ce 耐热钢253MA 凝固组织 夹杂物 |
| 收稿时间： | 2019-06-17 |
Effect of rare earth Ce on solidification structure and inclusions of 253MA heat-resistant steel |
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| Yang Lilin,Qi Jianbo,Zhao Liping,Jia Yongjie.Effect of rare earth Ce on solidification structure and inclusions of 253MA heat-resistant steel[J].Heat Treatment of Metals,2020,45(1):26-30. |
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| Authors: | Yang Lilin Qi Jianbo Zhao Liping Jia Yongjie |
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| Affiliation: | 1. Inner Mongolia Key Laboratory of New Metal Material, Baotou Inner Mongolia 014010, China;2. School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou Inner Mongolia 014010, China |
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| Abstract: | The solidification structure and the morphology,composition and structure of inclusions of 253 MA steel with different content of rare earth Ce were characterized and analyzed by confocal laser scanning microscope,field emission scanning electron microscopy( FESEM)and electron backscatter diffraction( EBSD). The results show that by comparing the solidification structures of two specimens,the equiaxial grain rate and columnar crystal refining effect can be promoted by the addition of cerium. The rare earth inclusions are CeO2 and(CeO)2SO4,which have fine and near-spherical dispersion distributions. It is found according to the statistical analysis and grading that the increase of rare earth Ce content is beneficial to the increase of D-type spherical inclusions,which helps to improve the high temperature resistance and oxidation resistance of the 253 MA steel. |
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| Keywords: | rare earth Ce heat-resistant steel 253MA solidification structure inclusion |
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