电磁振荡对Al-Si过共晶合金凝固组织的影响  

Effect of Electromagnetic Vibration on Solidification Structure of Al-Si Hypereutectic Alloy

作　　者：黄立国[1] 付大军[1] 高志玉[1] 

机构地区：[1]辽宁工程技术大学材料科学与工程学院,辽宁阜新123000

出　　处：《热加工工艺》2009年第11期5-7,共3页Hot Working Technology

摘　　要：研究了电磁振荡作用对Al-18%Si过共晶合金凝固组织的影响。实验结果表明:电磁振荡作用改变了共晶Si相和初生Si相的生长形态;随着电磁振荡强度的增加,Si相的形态经历了一次细化的过程。初步分析表明,组织的细化是由于固-液界面前沿成分过冷、温度梯度的减弱以及电磁制动效应阻碍Si自由粒子的运动两方面原因造成的。The effect of electromagnetic vibration on the solidification structure of Al-18%Si hypereutectic alloy was studied. The results show that the electromagnetic vibration changes the growth of eutectic Si phase and primary Si phase. With the increase of the electromagnetic vibration, the shape of the Si phase experience a process of refinement. The initiative analysis shows that the refinement of the structure due to super-cooling of the element and the reduction of the temperature gradient of the front of the solid liquid inter-face as well as the hindrance of electromagnetic braking effect to the movement of Si free particles.

关 键 词：电磁振荡 凝同组织 AL-SI过共晶合金 

分 类 号：TG146.2[一般工业技术—材料科学与工程]