Abstract: Residual stress distribution of 2219 aluminum alloy ring parts during quenching process and subsequent bulging process was simulated by ABAQUS finite element software, and the influence of bulging amount on reduction of quenching residual stress was studied. The results show that after quenching, the radiat stress of the ring is compressive stress of about -106 MPa on the outside of upper and lower side, while the stress at the core is small. Both the circumferential stress and the axial stress are distributed as compressive stress on the outside and as tensile stress at the core. The bulging has a significant reduction effect on radial stress, circumferential stress and axial stress of the ring. When the bulging amount increases in the range of 0.25%-4.00%, the residual stress of the ring decreases, the reduction rates of both the circumferential stress and the axial stress increase and tend to a fixed value, and the reduction rate of the circumferential stress increases faster than that of the axial stress. When the bulging amount is less than 3%, the reduction rate of circumferential stress is greater than that of axial stress; when the bulging amount is greater than 3%, the reduction rate of circumferential stress is slightly smaller than that of axial stress; when the bulging amount is greater than 2%, the average reduction rate of the circumferential stress and the axial stress is greater than 80%, which indicates that the residual stress of ring after quenching is well reduced.

Key words: 2219 aluminum alloy, quenching, bulging, residual stress field