摘要
In order to study the effect of the stirring flow on the grain diameter and solute concentration of hollow billet, the couple model of the two-phase solidification and electromagnetic field was built to simulate the solidification process of Sn-3.5%Pb hollow billet with the traveling magnetic field and rotating magnetic field. The effects of different kinds of flows on the temperature field, concentration field and grain diameter of molten metal during solidification were analysed. The results show that, there are different flow patterns in the molten metal induced by the traveling magnetic field and rotating magnetic field. Both flows can refine the grains in the hollow billet because of change of the temperature gradient and cooling rate of molten metal. The bigger the stirring velocity is,the smaller the grain diameter. Both flows can result in the macro-segregation in the hollow billet because of the non-homogeneous flows. The bigger the stirring velocity, the more serious the macro-segregation of the hollow billet. So, the stirring intensity should be controlled to acquire the high quality hollow billet.
In order to study the effect of the stirring flow on the grain diameter and solute concentration of hollow billet, the couple model of the two-phase solidification and electromagnetic field was built to simulate the solidification process of Sn-3.5%Pb hollow billet with the traveling magnetic field and rotating magnetic field. The effects of different kinds of flows on the temperature field, concentration field and grain diameter of molten metal during solidification were analysed. The results show that, there are different flow patterns in the molten metal induced by the traveling magnetic field and rotating magnetic field. Both flows can refine the grains in the hollow billet because of change of the temperature gradient and cooling rate of molten metal. The bigger the stirring velocity is, the smaller the grain diameter. Both flows can result in the macro-segregation in the hollow billet because of the non-homogeneous flows. The bigger the stirring velocity, the more serious the macro-segregation of the hollow billet. So, the stirring intensity should be controlled to acquire the high quality hollow billet.
出处
《中国有色金属学会会刊：英文版》
EI
CSCD
2007年第5期940-946,共7页
Transactions of Nonferrous Metals Society of China
基金
Project(50274017
50474055) supported by the National Natural Science Foundation of China
Project(20052176) supported by Natural Science Foundation of Liaoning Province, China
Project supported by Homecoming Foundation of Ministry of Education, China
关键词
Sn-3.5%Pb合金
磁铁
空心钢
磁性旋转
Sn-3.5%Pb alloy
traveling.magnetic field
rotating magnetic field
hollow billet
,temperature field
concentration field
