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J Mater Sci Technol  2004, Vol. 20 Issue (04): 421-425    DOI:
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Study Segregation of Alloying Elements in Continuous Casting Slab with Valence Electron Structure
Yan LIU, Zhilin LIU, Chengwei ZHANG, Yingguang ZHU
College of Science, Northeastern University, Shenyang 110004, China;Liaoning Institute of Technology, Jinzhou 121001, China
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Abstract  By calculating the electron structures of the phases that phosphor, sulfur and alloying elements dissolving in γ-Fe, the reason why alloying elements can bring centerline segregation in continuous casting slab (CCS) with nA, the number of electrons on the strongest covalent bonds, and the structure formation factor S were investigated, and an electron structural criterion to control and to eliminate the centerline segregation was advanced. Basing on this, the electron structures of a part of rare earth phosphides and sulfides are calculated, the physical mechanism that rare earth elements can control the segregation of phosphor and sulfur is analyzed, and the criterion is well verified.
Key words:  Valence electron structure      Continuous casting slab      Centerline segregation      Rare-earth elements      
Received:  01 January 1900     
Corresponding Authors:  Yan LIU     E-mail:  yan_liu123@yahoo.com.cn

Cite this article: 

Yan LIU, Zhilin LIU, Chengwei ZHANG, Yingguang ZHU. Study Segregation of Alloying Elements in Continuous Casting Slab with Valence Electron Structure. J Mater Sci Technol, 2004, 20(04): 421-425.

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