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对初始变形量为37.5%的5052铝合金冷轧板进行中间退火试验,研究了不同退火条件下5050合金组织和力学性能的影响规律。结果表明,随着中间退火温度的提高和退火时间的延长,合金组织由变形亚结构态逐渐转变为完全再结晶组织,再结晶晶粒尺寸的分布较均匀;经二次冷轧后,合金在400℃下退火时屈服强度σ0.2、抗拉强度σb和屈强比σ0.2/σb均较在350℃下的低,而伸长率δ5却比在350℃时高。
The intermediate annealing experiment was conducted on the cold rolled 5052 aluminum alloy with the initial deformation of 37.5%. The influence of different annealing conditions on the microstructure and mechanical properties of 5050 aluminum alloy was studied. The results show that with the increase of intermediate annealing temperature and annealing time, the microstructure of the alloy gradually changes from the deformed sub-structure to the completely recrystallized structure and the recrystallization grain size distribution is more uniform. After secondary cold rolling, The yield strength σ0.2, the tensile strength σb and the yield strength σ0.2 / σb at 400 ℃ are lower than those at 350 ℃, while the elongation δ5 is higher than at 350 ℃.