科技导报
科技導報
과기도보
SCIENCE & TECHNOLOGY REVIEW
2010年
7期
100-103
,共4页
AZ80镁合金%电磁场%晶内溶质含量%凝固组织
AZ80鎂閤金%電磁場%晶內溶質含量%凝固組織
AZ80미합금%전자장%정내용질함량%응고조직
AZ80 Mg alloy%electromagnetic field%the solute content inside grain%solidification structure
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.
將AZ80鎂閤金鑄錠在鋸床上鋸成8mm厚的薄片,然後在剪床上剪成長約120mm、寬約5mm的小條,放入電阻爐內,加熱到660℃.施加不同的電磁場,研究在電磁場下凝固的AZ80鎂閤金晶內溶質含量及凝固組織的變化.結果錶明,與未施加磁場的試樣相比,經過交直流磁場處理後,AZ80鎂閤金中Al、Zn 2種溶質元素在晶粒內部的含量均增加.此外,交流磁場作用下,晶粒細化,夾雜物的呎吋和數量有所減少,10Hz比30Hz的效果更加明顯.經直流磁場處理後,晶粒大小與無磁場差彆不大,但夾雜物的呎吋減小.
장AZ80미합금주정재거상상거성8mm후적박편,연후재전상상전성장약120mm、관약5mm적소조,방입전조로내,가열도660℃.시가불동적전자장,연구재전자장하응고적AZ80미합금정내용질함량급응고조직적변화.결과표명,여미시가자장적시양상비,경과교직류자장처리후,AZ80미합금중Al、Zn 2충용질원소재정립내부적함량균증가.차외,교류자장작용하,정립세화,협잡물적척촌화수량유소감소,10Hz비30Hz적효과경가명현.경직류자장처리후,정립대소여무자장차별불대,단협잡물적척촌감소.
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.
