超声处理半固态AZ91D组织分布规律研究  

Research on structure distribution of ultrasonic processed semi-solid AZ91D magnesium alloy

作　　者：陈国平[1,2] 周天瑞[1] 闫洪[1] 孙一峰[3] 李克[1] 

机构地区：[1]南昌大学机电工程学院,南昌330029 [2]湖南工业大学机械工程学院,株洲412000 [3]华菱集团湘潭钢铁集团有限公司,湘潭411001

出　　处：《塑性工程学报》2010年第2期135-139,共5页Journal of Plasticity Engineering

基　　金：国家自然科学基金资助项目(50465003);江西省科技厅工业攻关资助项目:高性能镁制备工艺过程优化

摘　　要：研究镁合金AZ91D在半固态下经超声处理后其微观组织的分布规律,进而研究半固态浆料形成细晶和非枝晶组织的机理。在不同的超声功率下,取一定的超声引入温度和超声持续时间,将镁合金AZ91D熔体试样在半固态状态下进行超声处理,获得了试样不同位置处的半固态微观组织。结果表明,在同一超声功率下,超声处理试样的不同位置所引起的晶粒形态和大小有很大差别,在不同功率下,相同取样位置的微观组织也有很大不同。The microstructure distribution of semi-solid AZ91D magnesium alloy after ultrasonic processing and the mechanism of the formation of the refining grains and non-dendrite structure were studied. Semi-solid AZ91D magnesium alloy melt samples were processed under different ultrasonic powers with same initial ultrasonic temperature and standing time, and microstructures of Semi-solid AZ91D at different position of the sample were obtained. The experimental results show that the microstructure of AZ91D magnesium alloy at different position of the sample under the same ultrasonic power is different in grain shape and size, and there is great difference in its microstructure at the same position of the sample under different ultrasonic powers.

关 键 词：镁合金 AZ91D 超声处理 半固态组织 分布规律 

分 类 号：TG113.1[金属学及工艺—物理冶金] TB559[金属学及工艺—金属学]