引用本文:
【打印本页】   【HTML】   【下载PDF全文】   【EndNote】   【RefMan】   【BibTex】
←前一篇|后一篇→ 过刊浏览    高级检索
本文已被:浏览 135次   下载 87 本文二维码信息
码上扫一扫!
分享到: 微信 更多
2A14 铝合金TIG-FSW交叉接头组织与力学性能
赵英杰1,孟占兴1,孙广达2,梁涛2,周利2
1.天津航天长征火箭制造有限公司,天津 300462;2.哈尔滨工业大学(威海)山东省特种焊接技术重点实验室,威海 264209
摘要:
针对6 mm厚2A14铝合金采用先钨极氩弧焊(TIG)后搅拌摩擦焊(FSW)的工艺进行焊接得到TIG-FSW丁字交叉接头。通过对交叉接头进行组织分析,可以发现接头左侧为熔焊区域,上部可见明显气孔缺陷,右侧搅拌摩擦焊接区域呈“碗状”分布,焊缝成形良好;硬度测试结果表明:熔焊区显微硬度值明显低于搅拌摩擦焊接区域,且焊核区右侧硬度值呈现“U”型分布;对交叉接头沿熔焊方向进行拉伸,断裂位置位于M态母材处,断口呈现典型韧性断裂特征。
关键词:  2A14铝合金  FSW  TIG  显微组织  力学性能
DOI:10.12044/j.issn.1007-2330.2020.04.019
分类号:TG457.14
基金项目:国家科技重大专项资助项目(2018ZX04013001)
Microstructure and Mechanical Properties of 2A14 Aluminum Alloy Intersection Weld by TIG and FSW
ZHAO Yingjie1, MENG Zhanxing1, SUN Guangda2, LIANG Tao2, ZHOU Li2
1.Tianjin Long March Launch Vehicle Manufacturing Co.Ltd.,Tianjin 300462;2.Shandong Provincial Key Laboratory of Special Welding Technology,Harbin Institute of Technology at Weihai,Weihai 264209
Abstract:
The intersection joint weld on 6 mm 2A14 aluminum alloy sheets was obtained by fusion welding (TIG) and friction stir welding (FSW).The macrostructure and microstructure were analyzed, and the fusion area was on the left side of the joint with the porosity defects on the upper of the area.The FSW area was on the right of the joint and displayed a “bowl” shape and the weld is well-formed.Microhardness test results reveal that the microhardness in the TIG weld is obviously lower than that in FSW weld,and the microhardness distribution in the right side of NZ presents “U” type.The tensile test is conducted in fusion welding direction and the joint fails in the base metal with M temper,and apperance of fracture is the toughness fracture modes.
Key words:  2A14 aluminum alloy  FSW  TIG  Microstructure  Mechanical properties