摘要
利用累积复合轧制法制备出叠轧2道次的Al/Mg/Al复合板,然后在250℃真空环境下对复合板材板分别进行了保温时间10、60、120 min的退火处理,进一步利用金相显微镜和扫描电镜研究了其微观组织的演变过程,并且分析退火处理对力学性能的影响。结果表明,在叠轧过程中Al层和Mg层复合界面上会形成由Al3Mg2和Al（12）Mg（17）组成的中间相。随着退火保温时间的延长,中间相的厚度逐渐增加,平均厚度由13.1μm增加到15μm。在退火过程中Al层和Mg层发生了不连续再结晶。随保温时间的增加,复合板材的硬度先下降后增加。
Al/Mg/Al compound board with two cycles was prepared by ARB process.The compound board was annealed at 250 ℃ with different holding time（10 min, 60 min, 120 min） in vacuum environment. Furthermore, OM and SEM were used to analyze the microstructure evolution process. The effects of annealing treatment on the mechanical properties were studied. The results show that the intermetallic compounds which is composed of Al3Mg2 and Al（12）Mg（17） appear at the interface between Al layer and Mg layer during ARB process. With the increase of annealing holding time, the width of the intermetallic compound increases from 13.1 μm to 15 μm, and in the annealing process, the discontinuous recrystallization between Al layer and Mg layer takes place. With the increase of holding time, the hardness of the compound board decreases firstly and then increases.
出处
《热加工工艺》
CSCD
北大核心
2018年第2期154-157,共4页
Hot Working Technology
关键词
累积叠轧
退火
AZ31
AL
微观组组织演变
力学性能
accumulative roll bonding（ARB）
annealing
AZ31
Al
microstructure evolution
mechanical properties
