电磁场对AZ80镁合金组织结构的影响

 将AZ80镁合金铸锭在锯床上锯成8mm厚的薄片，然后在剪床上剪成长约120mm、宽约5mm的小条，放入电阻炉内，加热到660℃，施加不同的电磁场，研究在电磁场下凝固的AZ80镁合金晶内溶质含量及凝固组织的变化。结果表明，与未施加磁场的试样相比，经过交直流磁场处理后，AZ80镁合金中Al、Zn 2种溶质元素在晶粒内部的含量均增加。此外，交流磁场作用下，晶粒细化，夹杂物的尺寸和数量有所减少，10Hz比30Hz的效果更加明显。经直流磁场处理后，晶粒大小与无磁场差别不大，但夹杂物的尺寸减小。

The Effect of Elecromagnetic Field on the Solidification Structure of AZ80 Mg Alloy

The ingot of AZ80 magnesium alloy was sawed into sheets of 8mm in thickness, then cut into strips of 120mm long and 5mm wide. Applying different electromagnetic fields, AZ80 magnesium alloy strips were heated to 660℃ in the resistance furnace. The influence of electromagnetic fields on the solidification structure of the AZ80 Mg alloy was examined. It is found that the grain becomes finer and the size and amount of inclusions are reduced in the sample with the AC magnetic field compared to the sample without the magnetic field. The grain sees no significant change in the DC magnetic field. The electron microprobe analysis shows that the Al and Zn contents inside the grain are increased.