Al-Cu-Mg-Zn超硬铝合金盘类构件塑性变形性能及锻造成形工艺的研究

目的 为了有效改善Al-Cu-Mg-Zn超硬铝合金盘类锻造构件成形精度和力学性能.方法 通过对代号7A04的Al-Cu-Mg-Zn系超硬铝合金进行热压缩实验,分析其流变行为;通过应力-应变数据,建立本构方程及热加工图.将构建的7A04超硬铝合金材料模型导入有限元分析软件中,同时对锻件成形过程进行仿真模拟并优化.结果 获得了基于Arrhenius模型的流变应力本构方程;确定了7A04超硬铝合金最适宜的加工区域,为后续的仿真模拟提供指导;基于7A04超硬铝合金盘类构件锻造成形有限元仿真模拟分析结果,获得了变形均匀锻件的最优方案.结论 通过全尺寸锻造生产实验对模拟分析结果进行验证,获得了变形均匀且无锻造工艺缺陷的7A04超硬铝合金盘类构件.

Plastic Deformation Properties and Forging Process of Al-Cu-Mg-Zn Ultra-Hard Aluminium Alloy Disc-Shaped Component

The work aims to effectively improve the geometric accuracy and mechanical properties of forged Al-Cu-Mg-Zn ultra-hard aluminum alloy disc-shaped component. The rheological behaviors of Al-Cu-Mg-Zn ultra-hard aluminum alloy named 7A04 were investigated by hot compression tests. The constitutive equation and processing maps were established according to stress-strain data. The established 7A04 ultra-hard aluminum alloy model was imported into simulation analysis software, and the forging process was simulated and optimized.The rheological stress-based equations based on the Arrhenius model were obtained and the most suitable processing area of 7A04 ultra-hard aluminum alloy was determined, which provided accurate guidance for subsequent simulation. According to the finite element simulation results of forged 7A04 ultra-hard aluminum disc-shaped component, the optimal solution for homogeneous plastic deformation of forged component was obtained. The simulation analysis results are verified by full-size forging production experiments, and the 7A04 ultra-hard aluminum alloy disc-shaped components with uniform deformation and no forging process defects are obtained.