中间退火工艺对1A80铝箔拉伸性能和显微组织的影响

Influences of Intermediate Annealing on Tensile Properties and Microstructure of 1A80 Aluminum Foils

对1A80铝片进行了不同工艺的中间退火,再冷轧得到铝箔,通过拉伸试验机、光学显微镜及X射线衍射仪等研究了退火工艺对铝材拉伸性能、显微组织和织构的影响。结果表明:中间退火工艺对铝片和铝箔力学性能和显微组织有明显的影响;适当温度(250℃)的中间退火可以提高其抗拉强度和伸长率,改善其加工性能,且有助于保持其中的冷轧纤维组织形态、降低晶粒度,不影响成品退火后铝箔的主要织构;当中间退火温度高于300℃时,铝材会出现再结晶,使其拉伸性能明显下降。

1A80aluminum foils were prepared by cold rolling of aluminum sheets treated by intermediate annealing in different processes.The tensile properties,microstructure and texture of the material of aluminum were studied by tensile testing,optical microscopy and X-ray diffraction.Results show that the influences of intermediate annealing process on tensile properties and microstructure of the aluminum sheets and aluminum foils were obvious.The intermediate annealing at a proper temperature（250 ℃）can enhance the tensile strength and elongation of the material and improve its machinability.It was also was helpful to maintain the fiber morphology and reduce the grain size of the cold rolled material,and had no influence on main texture of aluminum foils after final annealing.When the intermediate annealing temperature was above 300 ℃,the recrystallization emerged in the material,which contributed to the decline of tensile properties of aluminum foils.