半固态等温处理制备AZ61-0.25Y镁合金的组织演变  

Microstructure Evolution of AZ61-0.25Y Magnesium Alloy Prepared by Semi-Solid Isothermal Treatment

作　　者：陶林 张华 张炯明 TAO Lin;ZHANG Hua;ZHANG Jiongming(Department of Material, He＇nan Industrial School, Zhengzhou 450002, China;State Key Laboratory of New Technology of Iron and Steel Metallurgy, University of Science and Technology Beijing, Beijing 100083, China)

机构地区：[1]河南省工业学校材料系,河南郑州450002 [2]北京科技大学钢铁冶金新技术国家重点实验室,北京100083

出　　处：《热加工工艺》2018年第9期122-124,共3页Hot Working Technology

摘　　要：使用半固态等温处理的挤压态AZ61-0.25Y镁合金试样进行了处理,分析了半固态等温处理时间对其组织演变的影响。结果表明：挤压态AZ61-0.25Y镁合金等温处理后生成的晶粒中有麻点状液相存在,α-Mg基体中生成了大量β-Mg17Al12固溶相,晶界处生成了更多的液相,在晶界以及晶内液相区域都属于Zn与Al元素的富集区。随等温处理时间延长,晶粒尺寸近似地线性增加,这有助于晶粒变得更加圆整。The extruded AZ61-0.25 Y magnesium alloy samples were treated by using semi-solid isothermal treatment.And the effect of semi-solid isothermal treatment time on its microstructure evolution was analyzed. The results show that the grains of extruded AZ61-0.25 Y magnesium alloy after isothermal treatment have hemp point liquid phase, a large number ofβ-Mg17 Al12 solid solution phases are formed in α-Mg matrix, and more liquid phase is formed at grain boundary. The liquid phase region both the grain boundaries and the crystal belong to the rich regions of elements Zn and Al. With the increase of isothermal treatment time, the grain sizes increase approximately linearly, which helps the grain become more round.

关 键 词：镁合金 半固态 等温处理 组织演变 

分 类 号：TG301[金属学及工艺—金属压力加工] TG249.26