2219铝合金TIG焊缝激光冲击强化与腐蚀性能研究
Effect of Laser Shock Strengthening on the Corrosion Properties of 2219 Aluminum Alloy in the Propellant of Tungsten Inter-gas Arc Welding
郝楠 1王焕春 2黄丹 3马岚 3曹宇浩 1慕晓刚 2王煊军2
作者信息
- 1. 火箭军工程大学智剑实验室,西安 710025
- 2. 火箭军工程大学智剑实验室,西安 710025;陕西省特种能源化学与材料重点实验室,西安 710025
- 3. 火箭军工程大学导弹工程学院,西安 710025
- 折叠
摘要
目的 改善2219 铝合金钨极氩弧焊焊缝的耐腐蚀性能.方法 采用激光冲击技术对焊缝进行强化处理,比较分析处理前后的表面残余应力、物相组成和元素状态,通过静态浸泡失重法和电化学试验测量腐蚀速率的变化.结果 经过激光冲击强化处理后,2219 铝合金焊缝部位的元素状态没有改变,但焊缝区域的残余拉应力变为残余压应力.2219 铝合金钨极氩弧焊接区域的自腐蚀电位明显下降,相比未经激光冲击处理的试件,焊核区和焊接过渡区的平均腐蚀电流分别减小了 14%和12.7%,腐蚀速率分别减小了16.9%和 12.9%.结论 激光冲击强化可以有效提升 2219 铝合金钨极氩弧焊焊缝区域的耐腐蚀性能,可以为提升特种装备安全性和轻量化提供技术参考.
Abstract
The work aims to improve the corrosion resistance of 2219 aluminum alloy TIG weld.Laser shock technology was used to strengthen the weld,and the surface residual stress,phase composition and element state before and after treatment were compared and analyzed.At the same time,the change of corrosion rate was measured by static immersion weight loss and electrochemical methods.The element state of the 2219 aluminum alloy weld did not change after laser shock strengthening,but the residual tensile stress in the weld became the residual compressive stress.The self-corrosion potential in the TIG welding zone of 2219 aluminum alloy decreased obviously.Compared with the specimens without laser shock treatment,the average corrosion current in the core zone and transition zone was reduced by 14%and 12.7%,and the corrosion rate was reduced by 16.9%and 12.9%,respectively.Therefore,laser shock strengthening treatment can significantly improve the corrosion resistance of 2219 aluminum alloy TIG weld,which provides technical reference for improving the safety and lightweight of special equipment.
关键词
激光冲击/2219铝合金/钨极氩弧焊/腐蚀/电化学测试/推进剂Key words
laser shock/2219 aluminum alloy/tungsten inter-gas arc welding/corrosion/electrochemical test/propellant引用本文复制引用
出版年
2024
NETL
NSTL
维普
万方数据