Abstract: The forming properties of 7075-T6 high strength aluminum alloy were studied in the temperature range of 50~250  °C by warm deep drawing test. The experimental results show that: the limit drawing ratio(LDR) first shows an increasing trend and then decreases at the same tools temperature condition; while at different tools temperatures condition the LDR increases with temperature gradually, the drawability at different tools temperatures condition exceeds that of same tools temperature condition when the temperature is over 150  °C, the maximum load force declines with temperature increasing. The LDRs at various temperatures are different while the thickness of cross-section does not change apparently. The influences of holder force and punch velocity were investigated: the material could have better forming properties when the holder force is 5 kN, punch speed 10 mm/min.

Key words: high strength aluminum alloy, warm form, limiting drawing ratio