温度/超声复合能场对2195铝锂合金弯曲性能的影响

Effect of Compound Energy-Field with Temperature and Ultrasonic Vibration on Bending Properties of 2195 Al-Li Alloy

摘要:

针对铝锂合金弯曲成形过程中易产生破裂和回弹大的问题，进行了温度/超声复合能场下的弯曲工艺研究，希望在保证成形质量条件下借助超声振动能场降低铝锂合金弯曲成形温度。在80~200 ℃温度条件下通过与1.0~1.6 kW超声振动能量复合，分析了温度/超声复合能作用形式对2195铝锂合金板材弯曲力、弯曲回弹量、弯曲圆角半径及显微组织的影响。结果表明，通过与超声振动能场复合，在相对较低的热成形温度条件下，不仅降低了2195铝锂合金弯曲力，还有效抑制了2195铝锂合金弯曲回弹和破裂，从而提高了2195铝锂合金的高温软化效果和弯曲性能。

Abstract:

In order to solve the problem of fracture and large springback during the bending forming of Al-Li alloy, the bending forming process under the compound energy-field (CEF) of temperature and ultrasonic vibration was studied. It is expected to reduce the temperature required for bending forming of Al-Li alloy with the help of ultrasonic vibration energy-field while maintaining the forming quality. The research was carried out by combining with ultrasonic vibration energy of 1.0~1.6 kW under the temperature conditions of 80~200 °C. The effects of CEF on the bending force, springback, bending fillet radius and microstructure of 2195 Al-Li alloy sheets were analyzed. The results show that at a relatively low temperature for hot forming, the bending force can be reduced by combining with ultrasonic vibration energy-field. The springback and fracture are effectively inhibited, thus improving the high temperature softening effect and bending properties of 2195 Al-Li alloy.