Hot forming quenching-integrated process (HFQ^®) has aroused widespread attention as a new stamping technology recently for producing complex-shaped structural parts. Forming-die temperature plays a critical role on tailoring the microstructure and mechanical properties of the final hot formed parts. In this paper, the HFQ^® + pre-ageing (PA) + simulated baking (SB) process was used for AA7075 alloy to investigate the changes in microstructure and mechanical properties as a function of forming-die temperature ranging from 25 to 400 °C. The results show that the volume fraction of η′ precipitates drops and part of η′ phase becomes coarsened after HFQ^® + PA + SB process with 25–200 °C forming dies, when compared with the base metal. As forming-die temperature ranges from 300 to 400 °C, a large number of η phase can be found. The overall mechanical properties of U-shaped parts were compared under various forming-die temperature. The forming-die temperature of 200 °C was selected where the AA7075 alloy U-shaped parts exhibit good combination of strength and ductility, i.e., the value of PSE being approximately 7534 MPa·%, which suits for the industry production.

热成型淬火结合工艺（HFQ ^®）引起了人们的广泛关注作为一种新的冲压技术，最近生产形状复杂的结构件。成型模具温度在调整最终热成型零件的微观结构和机械性能方面起着至关重要的作用。在本文中，所述HFQ ^®  +预老化（PA）+模拟烘烤，使用（SB）过程用于AA7075合金以调查在微观结构的变化和机械性能作为形成模头温度为25至400的功能℃下。结果表明的体积分数η '析出物和下降的一部分η '相HFQ后变得粗大化^® 与母材相比，+ PA + SB工艺具有25–200°C的成型模具。当成形模温度为300至400°C时，可以发现大量的η相。比较了U型零件在各种成型模具温度下的总体机械性能。选择的成型模具温度为200°C，其中AA7075合金U形零件具有强度和延展性的良好组合，即PSE值约为7534 MPa·％，适合工业生产。