摘要
结合某一圆坯连铸结晶器,开展了优化电磁搅拌工艺参数的试验研究,对电磁搅拌电流和频率这两个主要的工艺参数进行了优化.通过研究发现:工作电流和工作频率下连铸坯存在不同的质量问题,2.0级的皮下气泡、1.0级的缩孔及1.5级的中心疏松缺陷的分布比例均为14.28%;搅拌电流由280 A增大到300 A后,铸坯中心区等轴晶率提高约16%,且300 A时等轴晶率趋于饱和;搅拌电流由300 A增大到320 A时,铸坯质量变差.通过试验研究后,给出了优化的电磁搅拌工艺参数.
Experiments for optimizing the electromagnetic stirring process parameters of a round billet continuous casting mold were performed, of which the current intensity and frequency were optimized. The results showed that the quality of round billets is not so good under working current/frequency; in which the distribution rates of Grade 2.0 surface blowhole, Grade 1.0 shrinkage and Grade 1.5 central porosity are all 14.28 %. With the increasing current intensity from 280 A to 300A during stirring process, the rate of equiaxial grain zone increases by about 16 % and it tends to remain unchanged if the current is up to 300 A. The quality of round billets becomes poor when the current intensity increases from 300 A to 320 A. The optimized mold electromagnetic stirring （M-EMS） parameters are given through some tests.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2008年第11期1589-1592,共4页
Journal of Northeastern University(Natural Science)
基金
国家自然科学基金与上海宝钢集团公司联合资助项目(50674020)
关键词
连铸结晶器
电磁搅拌
圆坯
电流强度
频率
continuous casting mold
electromagnetic stirring
round billet
current intensity
frequency
