动力电池用3003铝合金中间退火工艺研究

Study on Intermediate Annealing Process of 3003 Aluminium Alloy for Power Batteries

利用万能试验机、光学显微镜及硬度计等设备,对铸轧态3003铝合金的中间退火工艺进行了研究。结果表明:3003铝合金的组织随中间退火温度的升高发生明显变化,当中间退火温度为385℃时,纤维状的组织全部变成等轴细小的再结晶晶粒。3003铝合金的硬度和强度随中间退火温度的升高,先快速下降而后稳定在一定范围内,而伸长率则呈相反趋势。当中间退火温度达385℃以上,3003铝合金的力学性能开始稳定在一定范围内;3003铝合金的硬度、抗拉强度、屈服强度和伸长率分别为42HV~43HV、147~149MPa、120~121MPa和30.5%~31%。因此,3003铝合金较合适的中间退火温度为385℃,本研究可为能源、航空航天和汽车等领域生产用铝提供一定的技术参考。

The intermediate annealing process of cast-rolled 3003 aluminium alloy was studied by means of universal testing machine,optical microscope and hardness tester.The results show that the microstructure of 3003 aluminium alloy changes obviously with the increase of the intermediate annealing temperature.When the intermediate annealing temperature is 385℃,the fibrous microstructure is equiaxed fine recrystallized grains.With the increase of the intermediate annealing temperature,the hardness and strength of 3003 aluminum alloy first decrease rapidly and then stabilize within a certain range,while the elongation showes the opposite trend.When the intermediate annealing temperature reaches 385℃,the mechanical properties of 3003 aluminum alloy begin to stabilize within a certain range;the hardness,tensile strength,yield strength and elongation of 3003 aluminum alloy are between 42 HV~43 HV,147~149 MPa,120~121 MPa and 30.5%~31%,respectively.Therefore,the intermediate annealing temperature of 3003 aluminum alloy is 385℃.This study can provide certain technical reference for the production of aluminum in energy,aerospace and automotive fields.