摘要
对2219铝合金搅拌摩擦焊接过程中容易出现的对接间隙、搅拌头与对接界面不对中等装配条件进行研究,并对接头的微观组织和力学性能进行分析。结果表明:在转速800r/min、焊速200mm/min、轴肩下压量0.3mm的优化参数下,接头抗拉强度随对接间隙的增加而降低,当对接间隙达到0.5mm时,接头拉伸性能显著降低;随着搅拌头偏移对接界面距离的增加,接头拉伸性能逐渐降低,但不同偏移方向有所差别,当偏移距离达到2.0mm时,接头底部出现未焊合缺陷,拉伸性能降低明显。
The faying surface gap and misalignment in 2219 Al alloy friction stir welding were investigated. The microstructure and me- chanical properties of the joint were discussed. Results show that the joint tensile strength decreases with the increase of laying surface gap under the optimized parameters of rotation speed 800r/min, welding speed 200mm/min and shoulder plunging depth of 0.3mm. Especially when laying surface gap width reaches 0.5mm,the joint tensile properties remarkably decrease. With the increase of pin tool offset from laying surface, the joint tensile properties decrease gradually, but the differences exist with the offset direction. The defects arc formed at the bottom of the joint with pin tool offset of 2.0 mm from laying surface, which results in significant decrease of tensile properties.
出处
《航空材料学报》
EI
CAS
CSCD
北大核心
2015年第2期34-42,共9页
Journal of Aeronautical Materials
基金
山东省自主创新及成果转化专项(2014C GZH1003)
威海市产学研合作创新示范工程资助计划项目(2014CXY02)
先进焊接与连接国家重点实验室开放课题研究基金(AWJ-M13-11)
作者简介
通讯作者：周利（1982－），男，博士，副教授，主要从事搅拌摩擦焊等先进连接技术研究，（E-mail）zhouli@hitwh．edu．cn。
