AZ31镁合金板的热冲压成形研究
Study on Hot Stamping of AZ31 Magnesium Alloy Sheet
郭晓明 1张晓蕾 1王子健 1项重辰 1丁汉林1
作者信息
- 1. 苏州大学 沙钢钢铁学院,江苏 苏州 215137
- 折叠
摘要
为了改善AZ31 镁合金板的成形性,对其 2 mm厚的挤压板分别在 25(室温)、250、300、350、400℃五个温度进行热冲压成形.通过回弹角测量、组织观察和力学性能测试,研究冲压成形温度对其回弹性能和显微组织、力学性能的影响.结果表明,室温冲压成形时,冲压件底部弯角处有细微的裂纹,且回弹现象较明显;随着冲压成形温度升高,AZ31 镁合金板的成形性能得到明显改善,回弹现象减弱.镁合金冲压板材的显微组织在室温下无孪晶产生,随着温度升高开始产生孪晶,在 250、300、350℃中均有大量孪晶生成,到达 400℃后孪晶开始减少至消失,材料发生再结晶现象,晶粒细化.
Abstract
In order to improve the formability of AZ31 magnesium alloy sheet,the 2 mm thick extruded sheet was hot stamped at five temperatures of 25(room temperature),250,300,350,and 400℃,respectively.Through springback angle measurement,microstructure observation and mechanical property test,the effects of stamping temperature on its springback,microstructure and mechanical properties were studied.The results show that there are fine cracks at the corners of the bottom of the stamping parts during room temperature stamping,and the springback phenomenon is obvious;with the increase of the stamping temperature,the formability of AZ31 magnesium alloy sheet is significantly improved,and the springback phenomenon is weakened.The microstructure of the magnesium alloy stamping sheet has no twins at room temperature.Twins begin to form as the temperature increases.A large number of twins are formed at 250℃,300℃and 350℃.After reaching 400℃,the twins begin to decrease even disappear,the material undergoes recrystallization,and the grains are refined.
关键词
AZ31镁合金/热冲压成形/显微组织/力学性能Key words
AZ31 magnesium alloy/hot stamping/microstructure/mechanical property引用本文复制引用
基金项目
国家自然科学基金青年基金项目(51905189)
出版年
2024
NETL
NSTL
万方数据