Improvement of casting speed and composition homogeneity of continuous casting billet under PMO
LI Hui-cheng1, LIU Hai-ning2, DENG Xiang-yang1, XU Jia-lu1, ZHU Fu-qiang1, WANG Ying1
1. Technology Center, Changzhou Zenith Group Co., Ltd., Changzhou 213011, Jiangsu, China; 2. Center for Advanced Solidification Technology, Shanghai University, Shanghai 200444, China
Abstract:In order to achieve the goal of increasing the electric furnace plant production efficiency, the application potential of pulsed magneto-oscillation (PMO) in improving casting speed was studied. The results show that the optimization of PMO processing parameters can meet the requirements of increasing the production speed, and can improve the central segregation and macroscopic segregation of the billet. When the casting speed is raised to 1.05 m/min, making the pulse frequency being 1.16Kf Hz and the peak voltage being 1.00KiV (Kf and Ki are the discharge frequency and the voltage peak, respectively),the cross section carbon segregation index can be controlled in the range of 1±0.05;When the casting speed is raised to 1.15 m/min, making the pulse frequency being 1.28Kf Hz and the peak voltage being 1.00KiV,the cross section carbon segregation index can be controlled in the range of 1±0.07.The experiment prove that the quality of continuous casting billet can be improved by ensuring the pulse energy applied to molten steel per unit time under the condition of high drawing speed.
GONG Y Y, LUO J, JING J X, et al. Structure refinement of pure aluminum by pulse magneto-oscillation[J]. Materials Science and Engineering: A, 2008, 497(1/2): 147.