Mold Level Fluctuation and Its Control for Slab Casting of Hypo-Peritectic Steels
LI Yang1,HUANG Quan-jin2,ZHANG Xiao-huan1,ZHANG Jia-quan1,ZHAO He-ming2,LAI Chao-bin2
（1. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China 2. Xinyu Iron and Steel Cooperation, Xinyu 338001, Jiangxi, China）
Abstract：The mechanism of the mold level fluctuation, especially for the hypo-peritectic steels, was investigated along with production tests. It is pointed out that the standing waves and unsteady bulging during slab casting are the dominant factors which contribute to the formation of mold level fluctuation. The popular mold level fluctuation of HP steels can be effectively depressed through the modification of the chemical composition together with the increasing cooling intensity for the earlier stage of the secondary cooling period, in which the carbon content should be given closest to the actual calculated peritectic point within the allowance of production composition control. The severe durative fluctuation during HP steels casting, however, is mainly attributed to the unsteady bulging from its uneven shell growth. The nearer of the actual carbon content of HP steels to the actual peritectic point, the weaker of the phase transformation contraction from the peritectic reaction, which will beneficial to the decrease of mold level fluctuation thanks to the more homogeneous shell thickness and the following smaller unsteady bulging.
收稿日期: 2010-09-14
出版日期: 2011-09-28
引用本文:
李阳，黄泉金，张小欢，张家泉，赵和明，赖朝彬. 亚包晶钢板坯连铸结晶器液面波动与控制[J]. 钢铁, 2011, 46(8): 43-47.
LI Yang1,HUANG Quan-jin2,ZHANG Xiao-huan1,ZHANG Jia-quan1,ZHAO He-ming2,LAI Chao-bin2. Mold Level Fluctuation and Its Control for Slab Casting of Hypo-Peritectic Steels. Iron and Steel, 2011, 46(8): 43-47.
2011, Vol. 46 
