Aiming at the poor large plastic deformability of high strength aluminum alloy with low extrudability and elongation

an aluminum alloy cartridge forming process was analyzed

and the hot extrusion process of cartridge case was simulated by using DEFORM-2Dfinite element software.The property parameters of the aluminum alloy during extruding process

such as effective stress

effective strain

temperature

velocity and metal flowing law

were analyzed

and effects of cooling modes on hot extrusion process of aluminum alloy cartridge after homogenization were also discussed.The results show that compared with water-quenching

the billet with furnace-cooling after homogenization has a smaller and well-distributed effective stress value

where peak value difference of the effective stress is about 10 MPa.Meanwhile

stress difference is increased by 5MPa with the decrease of the extrusion temperature at every 50℃

and the extrusion load is reduced by approximately 15%.The calculated results is well agreement with that of ones in experiments.