7075-T6高强度铝合金温热条件下的拉深成形性能

采用温热拉深试验方法研究了在50~250 °C范围内，温度、压边力和成形速度对高强度铝合金7075-T6成形性能的影响.结果表明：在等温条件下，7075 T6的极限拉深比随着温度升高而先增后减；在差温条件下，极限拉深比随着温度升高而增大，当温度超过150 °C时，其极限拉深比较等温条件的大；随着温度升高，拉深成形所需要的力降低；在等温或差温条件下，虽其极限拉深比的差别较大，但其杯形件厚度的变化规律基本一致；当压边力为5 kN，速度为10 mm/min时，试样的成形性能最佳.

Deep Drawability of 7075-T6 High Strength Aluminum Alloy at Warm Condition

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.