| 钢中大尺寸稀土夹杂物的形成动力学研究 |
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| 引用本文： | 赵晓栋,姜江,李国宝,李风照.钢中大尺寸稀土夹杂物的形成动力学研究[J].中国稀土学报,2004,22(1):142-144. |
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| 作者姓名： | 赵晓栋 姜江 李国宝 李风照 |
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| 作者单位： | 1. 山东大学,南校区,材料科学与工程学院,山东,济南,250061
2. 山东大学,南校区,材料科学与工程学院,山东,济南,250061;济南钢铁集团总公司,山东,济南,250101 |
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| 摘 要： | 以添加稀土等微合金化元素的5CrNiMo钢为例, 通过电子探针元素面分布分析探讨了钢中大尺寸稀土夹杂物的成分和组成元素的分布规律, 初步探明了稀土夹杂物的形成动力学及形成机制. 研究结果表明: 稀土夹杂物首先以高熔点氧化物和硫化物为核心分别独立形核长大, 然后以稀土所特有的较高表面活性在液相和凝固过程中相结合, 最终细小分散的稀土夹杂物合并成一个大尺寸的稀土夹杂物.
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| 关 键 词： | 金属材料 稀土夹杂物 独立形核-合并长大 动力学 稀土 |
| 文章编号： | 1000-4343(2004)01-0142-03 |
Kinetics of Formation of Large Rare Earth Inclusion in Steels |
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| Zhao Xiaodong,Jiang Jiang.Kinetics of Formation of Large Rare Earth Inclusion in Steels[J].Journal of the Chinese Rare Earth Society,2004,22(1):142-144. |
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| Authors: | Zhao Xiaodong Jiang Jiang |
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| Institution: | Zhao Xiaodong~1,Jiang Jiang~ |
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| Abstract: | The distribution and the compositions of large-dimension inclusions in steels was studied through analyses of area distribution of elements with EPMA, and the kinetics and mechanism for formation of RE inclusions were discussed. Taking 5CrNiMo steel with RE and other microalloying elements additions as an example. Firstly RE inclusions nucleate and grow up separately centering on oxides and sulphides with high melting point, and then integrate by relatively high surface activity, which is a unique characteristics of RE elements, in liquid phase and during solidification. Finally the small dispersive RE inclusions incorporate and grow into a large one. |
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| Keywords: | metal materials RE inclusion nucleate separately-incorporate and grow kinetics rare earths |
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