Influence of Secondary Cooling Mode on Solidification Structure and Macro-segregation Behavior for High-carbon Continuous Casting Bloom

Author:

Dou Kun1,Yang Zhenguo12,Liu Qing1,Huang Yunhua3,Dong Hongbiao4

Affiliation:

1. State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing10083, China

2. Special Steel Plants, Laiwu Iron and Steel Co., Ltd., Laiwu271104, Shandong, China

3. Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing100083, China

4. Department of Engineering, University of Leicester, LeicesterLE1 7RH, UK

Abstract

AbstractA cellular automaton–finite element coupling model for high-carbon continuously cast bloom of GCr15 steel is established to simulate the solidification structure and to investigate the influence of different secondary cooling modes on characteristic parameters such as equiaxed crystal ratio, grain size and secondary dendrite arm spacing, in which the effect of phase transformation and electromagnetic stirring is taken into consideration. On this basis, evolution of carbon macro-segregation for GCr15 steel bloom is researched correspondingly via industrial tests. Based on above analysis, the relationship among secondary cooling modes, characteristic parameters for solidification structure as well as carbon macro-segregation is illustrated to obtain optimum secondary cooling strategy and alleviate carbon macro-segregation degree for GCr15 steel bloom in continuous casting process. The evaluating method for element macro-segregation is applicable in various steel types.

Publisher

Walter de Gruyter GmbH

Subject

Physical and Theoretical Chemistry,Mechanics of Materials,Condensed Matter Physics,General Materials Science

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