Authors: Wang, H.-M.¹; Li, G.-R.²; Ren, Z.-M.³; Zhao, Y.-T.²

Source: Ironmaking & Steelmaking, Volume 36, Number 8, November 2009 , pp. 615-622(8)

Publisher: Maney Publishing

Abstract:

A three-dimensional finite element model of the electromagnetic field and temperature field of electromagnetic continuous casting (EMCC) process was developed. The aim was to investigate the effects of induction heat of high frequency electromagnetic field on the early solidification process of molten steel in mould under various conditions of exciting current parameters. The results show that the induction heat has significant effects on the early solidification process, which appear as increasing the billet surface temperature, thinning the initial solidified shell and lowering the starting point of the initial solidification. The increases in exciting current frequency and density make the effects of induction heat on solidification process increase remarkably. Especially, with the exciting current frequency increase, the early solidification process and shell growth become non-uniform in billet circumferential direction. Furthermore, if the exciting current density exceeds a certain value, there occurs a high temperature region in the top of molten steel column, and then the initial solidification rate is greatly decreased. As a conclusion, the effects of induction heat on initial solidification process must be considered when the exciting current frequency and density are adjusted during the electromagnetic continuous casting process.

Keywords: NUMERICAL SIMULATION; INITIAL SOLIDIFICATION; ELECTROMAGNETIC CONTINUOUS CASTING; INDUCTION HEAT; EXCITING CURRENT PARAMETER; HIGH FREQUENCY ELECTROMAGNETIC FIELD

Document Type: Research Article

DOI: http://dx.doi.org/10.1179/174328109X461374

Affiliations: 1: School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China; School of Materials Science and Engineering, Shanghai University, Shanghai 200072, China 2: School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China 3: School of Materials Science and Engineering, Shanghai University, Shanghai 200072, China

Publication date: 2009-11-01

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