摘要
提出一种新型的电磁铸造工艺——异相位电磁铸造,并在Al-Mg-Si系合金水平连铸过程中进行实验。异相位电磁铸造技术是通过对常规铝合金铸造用的结晶器结构进行改进,在其外围配置两组励磁线圈,通之以频率相同、相位不同的交流电。在异相位交变磁场与熔体的交互作用下,熔体内产生电磁力驱动的强迫对流。通过实际测量考察了熔体中磁场的分布和磁场作用对熔体温度场的影响,通过显微组织观测考察了异相位磁场对铸锭铸态组织的影响。结果表明,异相位磁场作用使熔体得到充分搅拌,熔体温度场趋于均匀,铸态组织得到显著细化。
A novel electromagnetic casting, out-phase electromagnetic casting, was proposed and it is applied to horizontal continuous casting AI-Mg-Si alloy ingots. The mold of conventional horizontal continuous casting was modified in out-phase electromagnetic casting process. Two coils surrounding the moldwere supplied with same frequency but different phase current. Under the interaction of the electromagnetic field and the melt, the forced convection in the melt was caused by electromagnetic force The distribution of magnetic field and its effect on temperature field in melt were investigated experimentally, The effect of electromagnetic field on as-cast structure of ingot was also studied by microstructure analysis. The results show that the melt can be fully stirred, which, in turn, make the temperature field uniform and refine as-cast microstructure.
出处
《铸造技术》
CAS
北大核心
2008年第8期1048-1051,共4页
Foundry Technology
基金
国家重点基础研究发展计划(2005CB623707)
关键词
异相位磁场
水平连铸
磁场分布
铸态组织
Out-phase electromagnetic field
Horizontal continuous casting
Distribution of magneticfield
As-cast structure
