锻压技术

退火工艺对高温叠轧AZ31镁合金板材组织与性能的影响

英文标题：Effect of annealing process on microstructure and properties of high temperature roll bonding for AZ31 magnesium alloy sheet

作者：廖本洪时来鑫胡励宋登辉周涛

单位：重庆理工大学

关键词：高温叠轧 AZ31镁合金退火累积应变量基面织构

分类号：TG376.5

出版年,卷(期):页码：2020,45(3):179-184

摘要：

将高温叠轧变形和退火再结晶相结合，尝试共同调控AZ31镁合金板材的组织与织构。在300 ℃下对高温叠轧AZ31镁合金板材进行不同时间的退火处理，并研究了退火对高温叠轧板材组织、晶粒取向和力学性能的影响。结果表明：随退火时间的增加，界面结合质量逐渐提高，当退火时间为30 min时，部分区域出现冶金现象；显微硬度随退火时间的增加而降低；延长退火时间，高温叠轧板材非基面取向晶粒比重显著增加，同时，高温叠轧历史累积应变量、后续退火两者共同作用促使 AZ31 镁合金板材基面织构显著弱化。

The microstructure and texture of AZ31 magnesium alloy sheet were controlled by the combination of high temperature roll bonding and annealing recrystallization. The effects of annealing on microstructure, grain orientation and mechanical properties of high temperature roll bonding for AZ31 magnesium alloy sheet were studied by annealing treatment at 300 ℃ for different times. The results show that the interfacial bonding quality increases with the increasing of annealing time.When the annealing time is 30 min, the metallurgical phenomena appears in some areas.The microhardness decreases with the increasing of annealing time.The proportion of non-base oriented grain in high temperature roll bonding sheet increases significantly with the increasing of annealing time.At the same time, the effect of historical cumulative strain and subsequent annealing of the high temperature roll bonding on the base texture of AZ31 magnesium alloy sheet is significantly weakened.

基金项目：

国家自然科学基金资助项目（51701034, 51805064）；重庆市基础研究与前沿探索项目(cstc2017jcyjAX0062, cstc2018 jcyjAX0035)；重庆市教委科学技术研究项目(KJ1600922, KJQN201801137)

廖本洪（1994-），女，硕士研究生 E-mail：15736346608@139.com 通讯作者：时来鑫（1986-），男，博士，副教授 E-mail：shilaixin2016@cqut.edu.cn

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