东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2008, Vol. 29 ›› Issue (10): 1459-1462+1466.DOI: -

• 论著 • 上一篇    下一篇

冷轧Mg-9Li-1Zn合金的退火热处理工艺

祖国胤;宋滨娜;李廷刚;姚广春;   

  1. 东北大学材料与冶金学院;
  • 收稿日期:2013-06-22 修回日期:2013-06-22 出版日期:2008-10-15 发布日期:2013-06-22
  • 通讯作者: Zu, G.-Y.
  • 作者简介:-
  • 基金资助:
    国家自然科学基金资助项目(50704012);;

On the annealing process for cold rolled Mg-9Li-1Zn alloy plate

Zu, Guo-Yin (1); Song, Bin-Na (1); Li, Ting-Gang (1); Yao, Guang-Chun (1)   

  1. (1) School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China
  • Received:2013-06-22 Revised:2013-06-22 Online:2008-10-15 Published:2013-06-22
  • Contact: Zu, G.-Y.
  • About author:-
  • Supported by:
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摘要： 以改善冷轧Mg-Li系合金的变形能力为目的,系统研究了冷轧变形后的Mg-9Li-1Zn合金的退火热处理工艺,分析了退火温度和退火时间对合金组织和性能的影响.研究结果表明:Mg-9Li-1Zn合金适宜的退火温度为280~300℃,退火温度过高会出现晶粒长大,表面脱锂等现象.300℃退火60 min后,合金的维氏硬度值为426.7 MPa,充分完成再结晶软化的合金在后续冷轧时总变形率可达70%.合金的退火时间以保证α相的充分球化及组织的均匀化为准则,实验中确定的最佳退火制度为300℃保温60 min.

关键词: 冷轧Mg-9Li-1Zn合金, 退火温度, 退火时间, 球化, 硬度

Abstract: In order to improve the deformability of cold rolled Mg-Li alloy plate, the annealing process for cold rolled Mg-9Li-1Zn alloy plate was investigated systematically to discuss the effects of annealing temperature/time on the microstructure and mechanical properties of the plate. The results showed that the appropriate annealing temperature is 280-300°C, and the further grain growing and surface lithium losing will occur if the temperature is too high. The hardness of alloy is 426.7 MPa after annealing at 300°C for 60 min, and the total cold deformation rate can be up to 70% after fully recrystallizing/softening. The criterion for annealing time of Mg-9Li-1Zn alloy is to make sure of the spheroidization of α phase and homogenization of microstructure. For this reason, the optimum annealing process should be at 300°C for 60 min as the result of tests.

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