文档介绍：
AZ31+Y+Sr 镁合金盒形件超塑气胀成形研
究#
于彦东1,林凯1,宁慧燕1,2,江鹏1*
5
10
15
20
25
30
(1. 哈尔滨理工大学材料科学与工程学院;
2. 黑龙江工程学院机电工程学院)
摘要:本文对添加了 Y 和 Sr 元素的双辊连铸连轧(TRC)AZ31 镁合金板材盒形件气胀成形工
艺进行了研究。采用双辊连铸连轧工艺制备出 1mm 厚的 AZ31+Y+Sr 板材,并进行了气胀
成形实验。采用光学显微镜和扫描电镜对胀形件进行金相组织分析,探索镁合金超塑性变形
机理和最佳超塑成形条件。通过对零件壁厚分布和空洞组织分析,探究盒形件变形过程和断
裂机理。结果表明,连铸连轧 AZ31+Y+Sr 镁合金板材在 400℃、 的气体压力下成形
饱满,细节体现良好。
关键词:AZ31+Y+Sr 镁合金,双辊连铸连轧,超塑性,盒形件气胀成形
中图分类号:
Superplastic Properties of Gas blow forming of AZ31+Y+Sr
Magnesium sheet
YU Yandong1, LIN Kai1, NING Huiyan1,2, JIANG Peng1
(1. School of Materials Science and Engineering,Harbin Unversity of Science and ology,
Harbin 150040;
2. School of Mechanical and Electrical Engineering,Heilongjiang Institute of Technology, Harbin
150050)
Abstract: Box-shaped superplastic forming process of the AZ31+Y+Sr magnesium alloy sheets
produced by twin-roll casting (TRC) and sequential hot rolling were studied. Gas blow forming
experiments on AZ31+Y+Sr magnesium alloy of 1mm sheets were carried out. We concluded through
optical microscope and SEM observation of the samples in order to explore the superplastic
deformation mechanism and best forming conditions. The thickness distribution and cavity
characteristics were analyzed to investigate the box-shaped deformation process and fracture
mechanism. The results show that gas blow forming of (TRC) AZ31+Y+Sr box-shapped par