激光表面处理对7075铝合金航空实体结构残余应力的影响

• 作 者: 李娜 李剑
• 机 构: 陕西铁路工程职业技术学院,广西南南铝加工有限公司,
• 出 处: 铸造技术
• 发表日期: 2016年01期
• 关键词: 残余应力 实体结构 7075铝合金 铝合金 激光表面处理 残余压应力 变形 道数 激光处理 激光扫描

模拟了不同激光表面处理工艺对7075铝合金航空实体结构残余应力的影响。结果表明,增加激光表面扫描道数,残余压应力值会增加,有利于疲劳性能的提高;但同时随着扫描道数的增加,构件的变形也增大。在实际激光处理过程中,应综合考虑残余应力和变形的效果。

The effects of different laser surface treatments on the residual stress of 7075 aluminum alloy aeronautical structure were simulated. The results show that increasing the scanning number of the laser surface increases the residual compressive stress, which is beneficial to the improvement of fatigue properties. However, the deformation of the component increases with the increase of the number of scanning tracks. In the actual laser processing, should consider the effect of residual stress and deformation.