Study Segregation of Alloying Elements in Continuous Casting Slab with Valence Electron Structure

J Mater Sci Technol ›› 2004, Vol. 20 ›› Issue (04): 421-425.

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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

Received:1900-01-01 Revised:1900-01-01 Online:2004-07-28 Published:2009-10-10
Contact: Yan LIU

Abstract

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

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

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Study Segregation of Alloying Elements in Continuous Casting Slab with Valence Electron Structure

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