中频电磁搅拌对铝硅合金组织结构的影响研究

Effect of Intermediate Frequency Electromagnetic Stirring on Microstructure of Al-Si Alloy

利用中频感应加热炉研究了电磁搅拌和感应热对铝硅合金微观结构的影响。结果表明,这两种效应相互制约,在适当的实验条件下可以起到均匀化组织,细化晶粒的作用;同时分布于趋肤深度范围内的电磁搅拌力对样品表层的细化效果更为明显。

Using intermediate frequency induction heating furnace,the effect of electromagnetic stirring and induction heating on the microstructure of Ai-Si alloy has been studied.It was found that these two effects are a mutual interference process.Under the proper conditions,the grain sizes can be refined and the distributions of phase in Al-Si alloy tend to homogenize.At the same time,the microstructure of eutectic silicon in surface is clearly refined under the effect of Lorentz force distributed in skin depth.