退火工艺对5083铝合金板材组织性能的影响

The Effect of Annealing Technics on the Microstructures and Properties of 5083 Aluminum Alloy Sheet

摘要: 采用金相观察、室温拉伸、冲杯实验、织构分析等方法分析了不同退火制度对5083铝合金板材组织性能的影响。分析结果表明：5083铝合金板材经270℃/1 h退火后开始发生再结晶，360℃/1 h退火后实现完全再结晶；板材随着退火温度的升高抗拉强度与屈服强度呈下降趋势，延伸率呈上升趋势；未经退火处理的冷轧板深冲时底部容易出现裂纹，退火后深冲性能得到改善，经360℃/1 h退火的板材深冲性能最好，制耳率为2.44%；经织构检测分析发现冷轧板具有强的形变织构，经360℃/1 h退火后形变织构减弱，再结晶织构增强。

Abstract: The effect of annealing technics on the microstructures and properties of 5083 aluminum alloy sheet were analysed by metallography, tensile testing, deep drawing and texture analysis. Results indicated that: the sheet started to recrystallize after 270℃/1 h annealing and recrystallization fi-nished after 360℃/1 h annealing. The strength of 5083 Al declined while elongation rised after annealing. The sheet without annealing treatment was prone to generate cracks at the bottom of the cup under deep drawing cups testing, and the deep drawing performance was improved after annealing. The earing rate was only 2.44% when the annealing technics was 360℃/1 h. The texture detection analysis found that the deformation textures of cold-roll sheet were strong, while deformation textures declined and recrystallization textures enhanced after 360℃/1 h annealing.