The super-large
2219 aluminum forged ring is a key structural part required by a major national aerospace science and technology project-a launch vehicle. It is mainly used for seamless rings such as connecting frames, transition rings and adapter frames between rocket compartments. 2219 aluminum alloy is a kind of AL-Cu-Mn high-strength aluminum alloy, which can be strengthened by heat treatment, has high room temperature strength, good high and ultra-low temperature mechanical properties, low temperature toughness, stress corrosion cracking resistance, etc., 2219 aluminum alloy and 7 series Compared with aluminum alloy, it has better forgeability, so it has good application value and meets the requirements of the latest large-scale integral light ring structure launch vehicle.
During the thermal processing of the large
2219 aluminum forged ring, due to the narrow deformation temperature range, grain coarsening and cracks are prone to occur. At the same time, uneven performance is prone to occur in the subsequent processing. Chalco Aluminum uses isothermal thermal compression simulation experiments to study the high-temperature plastic rheological behavior of 2219 aluminum alloy at different deformation temperatures and strain rates, and establishes hot working diagrams at different strain rates, strains and deformation temperatures, and obtains the 2219 aluminum alloy material The best processing area lays the foundation for formulating and optimizing the ring rolling processing technology of super large ring parts.
