摘要
通过对板坯逐层刨钢屑,采用化学分析和低倍组织检验的方法,研究了板坯连铸机二冷区电磁搅拌频率参数对1450mm×230mm板坯中心偏析和等轴晶率的影响.结果表明:单独采用二冷区电磁搅拌相比不采用电磁搅拌工艺的板坯中心偏析程度明显减轻,C、P、Mn的中心正偏析系数低于无电磁搅拌工艺的板坯;电磁搅拌频率为2Hz,5Hz和8Hz时板坯中心偏析都为B0.5级;电磁搅拌频率对中心等轴晶率略有影响,搅拌频率5Hz的情况下等轴晶率最大.
Using layer-by-layer shave steel scrap, the effect of electromagnetic stirring frequency parameter at secondary cooling area on the central segregation and equiaxed crystal ratio of a 1 450 mmx 230 mm slab was investigated by chemical analysis and macrostructure. On the basis of data analysis, three conclusions are drawn： （1） the central segregation is obviously improved when electromagnetic stirring is applied at secondary cooling area, and the positive segregation coefficients of C, P and Mn are lower than those of no electromagnetic stirring; （2） the level of central segregation is all 130.5 when the electromagnetic stirring frequencies are 2, 5 and 8 Hz; and （3） electromagnetic stirring frequency has slight influence on the central equiaxed crystal ratio, and the largest equiaxed crystal ratio appeased in the case of 5 Hz frequency.
出处
《北京科技大学学报》
EI
CAS
CSCD
北大核心
2007年第6期582-585,590,共5页
Journal of University of Science and Technology Beijing
关键词
连铸板坯
电磁搅拌
中心偏析
等轴晶率
continuously cast slab
electromagnetic stirring
central segregation
equiaxed crystal ratio
