Abstract:
A hot forming process with synchronous cooling followed by aging treatment was conducted on 7075 aluminum alloy in H18 temper, and then the macro morphology, springback angle, microstructure and tensile properties of the alloy were studied and compared with those after traditional cold stamping. The results show that the hot forming with synchronous cooling process can be applied to forming 7075 aluminum alloy. The springback angle of the formed specimen was 0.03°, which was far lower than that after cold stamping. And the formed specimen had no buckling deformation. The microstructure of the formed specimen by hot forming with synchronous cooling was the same as that by the traditional cold stamping followed by solid solution treatment. After aging at 120℃ for 24 h, the yield strength and tensile strength were 553.98 MPa and 635.08 MPa, respectively, meeting the performance requirements of 7075 aluminum alloy in T6 temper qualified by the relevant standard.