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《中国科学:技术科学(英文版)》 2011-05
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Mechanism of broadening of slab in continuous casting

FU JianXun1,2*, LI JingShe1 & ZHANG Hui3 1 School of Metallurgical and Ecological Engineering, University of Science&Technology Beijing, Beijing 100083, China; 2 School of Mechatronics Engineering, University of Jiaozuo, Jiaozuo 454000, China; 3 National Engineering Research Center of Continuous Casting Technology, China Iron & Steel Research Institute Group, Beijing 100081, China  
The mechanism of broadening of slab in continuous casting was studied by numerical simulations and experimental measurements in factories. The mechanism is derived by gradual exclusion of various factors related to the broadening of slab. It is concluded that the slab exposes to no constraint at the direction of narrow face. Because of the static pressure of molten steel, the slab deforms creepily in the direction that consequently results in the broadening of slab. The broadening of slab increases with casting speed and static pressure of molten steel. The decrease of secondary cooling intensity and strength of steel at high temperature also contribute to the broadening of slab. The micro-alloying plays an important role in improving the strength of steel and in reducing the broadening of slab.
【Fund】: supported by the Key Projects in the National Science & Technology Pillar Program during the Eleventh Five-Year Plan of China(Grant No. 2006BAE03A04)
【CateGory Index】: TF777.1
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