淬火工艺对7075合金力学性能的影响

Effects of Quenching Process on Mechanical Properties of 7075 Aluminum Alloy

利用电子万能试验机和扫描电镜研究了淬火工艺对7075合金力学性能的影响,确定了合理的淬火工艺参数。结果表明,淬火处理温度范围虽然较宽,但7075合金在490℃时即有过烧的危险,综合考虑,淬火温度应选择(470±5)℃;淬火水温应控制在40℃以下;淬火转移时间应控制在30s以内;淬火至时效处理的时间间隔对板材力学性能影响不大。

Effects of quenching process on mechanical properties of 7075 aluminum alloy were examined by the universal mechanical testing machine and SEM (scanning electron microscope) to obtain the optimal quenching parameters. The results reveal that a wide quenching temperature range can be employed for treating 7075 aluminum alloy, however, overheating can be observed at 490℃, so the optimal quenching temperature is selected at 470±5℃, meanwhile, the water temperature and transferring time should be controlled below 40℃ and 30 s, respectively. The time span between quenching and aging treatment has little effect on mechanical properties of 7075 aluminum alloy.