| 稀土在离心灰铸铁管中的作用 |
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| 引用本文： | 宋维锡,王明强.稀土在离心灰铸铁管中的作用[J].北京科技大学学报,1991,13(6):526-532. |
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| 作者姓名： | 宋维锡 王明强 |
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| 作者单位： | 北京科技大学材料科学与工程系
(宋维锡，熊仲明，戴纯茹)，北京科技大学冶金系
(王明强)，北京科技大学冶金系(粟翠云) |
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| 摘 要： | 利用光学显微镜和扫描电镜并结合电子探针和化学分析,研究了稀土在离心灰铸铁管中的作用。结果表明,在保证灰口铸铁的先决条件下,普通离心灰铸铁管的组织,尽管可随基本化学成分和铸造条件的不同而变化,但其特征是组织粗大且很不均匀,并有明显的分层现象。加入微量稀土后,无论显微组织和宏观组织都显著趋于细化和均匀化,同时,化学成分的偏析也有明显改善。
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| 关 键 词： | 灰铁 稀土 离心铸管 管材 铸造 |
The Role of RE in Centrifugal-Casting Grey Cast Iron Pipes |
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| Song Weixi Xong Zhungming Wang Mingqiang Dai Chunru Su Caiyun.The Role of RE in Centrifugal-Casting Grey Cast Iron Pipes[J].Journal of University of Science and Technology Beijing,1991,13(6):526-532. |
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| Authors: | Song Weixi Xong Zhungming Wang Mingqiang Dai Chunru Su Caiyun |
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| Institution: | Song Weixi Xong Zhungming Wang Mingqiang Dai Chunru Su Caiyun (Department of Metallurgy)(Department of Materials Science and Engineering) |
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| Abstract: | By means of OPM, SCM, EP and chemical analysis, the role of RE in centrifugal-casting grey cast iron pipes is studied. The results show that the structures are rery course and heterogeneous in glay cast iron pipes for ordinary centrifugal-casting. When a suitable quantity of RE is added into the melt during pouring, both the macro-and microstructures become fine and homo-geneous,and the degree of chemical segregation is also considerably reduced. |
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| Keywords: | RE grey cast iron centrifugal-casting pipe structure |
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