(1. 重庆大学 国家镁合金材料工程技术研究中心，重庆 400044；
2. 重庆大学 材料科学与工程学院，重庆 400045)
摘 要: 研究用粉末轧制方法制备的Mg-3%Al-1%Zn(质量分数)合金生带坯在氩气气氛下的烧结行为，用X射线衍射、差热分析以及金相方法等分析镁合金在烧结过程中的组织变化。结果表明；粉末轧制镁合金生带材可采用“预烧结−冷轧−再烧结”工艺进行烧结，即在氩气气氛下550 ℃预烧结120 min，然后进行大变形量的冷轧，最后在600 ℃下保温60 min实现烧结；通过再结晶、冷变形与烧结的耦合，获得的带材组织均匀，其相对密度达到97.5%。
关键字: Mg-Al-Zn合金；粉末轧制；烧结；显微组织
（1. National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing 440044, China;
2. College of Material Science and Engineering, Chongqing University, Chongqing 400045, China）
Abstract: The sintering behavior of green strip of Mg-3%Al-1%Zn magnesium alloy prepared by powder rolling was studied in argon atmosphere. The development of microstructure of magnesium alloy was analyzed by using X-ray diffractometry, DSC and metallography. The results show that the magnesium alloy green strip can be sintered through sintering program of presintering, cold rolling and sintering. The green strip suffers presintering at 550 ℃ for 120 min in argon atmosphere, then standing for large amount of cold roll deformation, and at last sintering at 600 ℃ for 60 min. The strips have uniform microstructure and high relative density of 97.5% by coupling of recrystallization, cold deformation and sintering.
Key words: Mg-Al-Zn alloy; powder rolling; sintering; microstructure
