2219铝合金高频耦合脉冲TIG焊接工艺  

High frequency energy coupling pulsed TIG welding process on 2219 aluminum alloy

作　　者：李显[1] 宋永伦[1] 卢振洋[1] 孙玉娟[1] 

机构地区：[1]北京工业大学机械工程与应用电子技术学院,北京100124

出　　处：《焊接学报》2015年第5期17-20,114,共5页Transactions of The China Welding Institution

基　　金：国家高技术研究发展计划项目(863计划;2002AA305402)

摘　　要：对2219铝合金采用高频耦合脉冲TIG的焊接工艺研究,结果表明,采用特殊交流以及叠加高频脉冲可以有效的细化组织,消除气孔和减少裂纹等冶金缺陷,显著改善和提高铝合金接头性能.在此基础上研究了单层焊和双层焊对接头性能的影响,对双层焊每一层的工艺参数做了优化,并对接头各微区采用了晶粒度的定量分析与对比,提出了通过控制热循环对接头"控性"的方法,使接头微观组织趋于均匀,是提高接头综合力学性能的一个新思路,在工程上具有适用性.A study on 2219 aluminum alloy welding using high frequency energy coupling pulsed TIG welding process are carried out. It shows that using a special AC with the high-frequency pulse current can refine the microstructure of weld,eliminate pores and reduce cracks and other defects effectively,and also can improve the properties of the aluminum alloy joint significantly. The properties of single-layer joint and double-layer joint were investigated and compared by means of quantitative analysis of grain size. The paper proposed a way to reach ' controllable joint property' by thermal cycles controlling,which makes the joint microstructure more homogeneous. It is a new way to improve the comprehensive mechanical properties of joint and therefore has applicability in engineering.

关 键 词：2219铝合金 高频耦合 脉冲TIG 接头力学性能 晶粒度评定 

分 类 号：TG444.74[金属学及工艺—焊接] TG146.21[一般工业技术—材料科学与工程]