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 33次   下载 29 本文二维码信息
码上扫一扫!
分享到: 微信 更多
2219厚板铝合金TIG和MIG焊接接头组织与性能对比研究
丁吉坤,宋建岭,蒙丹阳,高泽峰,王亚森
天津航天长征火箭制造有限公司,天津 300462
摘要:
对15mm厚2219-C10S铝合金分别进行钨极惰性气体保护焊(TIG)、熔化极惰性气体保护焊(MIG)对接试验,对接头焊缝成形、内部质量、组织形貌及力学拉伸性能进行对比分析。结果表明:TIG焊缝表面光亮洁净,鱼鳞纹美观,焊缝内部近无缺陷,MIG焊接头焊缝飞溅较多,焊缝表面较为粗糙,焊缝内部存在少数单个小气孔。TIG焊缝晶粒尺寸较为细小,分布均匀,MIG焊盖面的焊缝组织晶粒则比较粗大,分布不均,热影响区比TIG焊接头的晶粒更为粗大。两种接头的熔合区组织不均匀,晶粒大小不一。常温拉伸试验中,两种接头均沿熔合区断裂,TIG焊接头强度和塑性要优于MIG接头。
关键词:  2219铝合金,焊缝成形,组织形貌,力学拉伸性能
DOI:10.12044/j.issn.1007-2330.XXXX.XX.001
分类号:TG442
基金项目:
Comparative Research on Microstructure and Properties of 2219 Thick Plate Aluminum Alloy TIG and MIG Welded Joints
DING Jikun, SONG Jianling, MENG Danyang, GAO Zefeng, WANG Yasen
Tianjin Long March Launch Vehicle Manufacturing Co.Ltd, Tianjin 300462
Abstract:
The tungsten inert gas welding (VPTIG) and metal inert gas welding (MIG) welding tests were carried out on the 15mm-thick 2219 aluminum plates. The shape, internal quality, microstructure and tensile properties of the joints were compared and analyzed. The results show that the surface of TIG weld is bright and clean while the MIG welds are rough. There are a few tiny pores in MIG weld while the inside of the TIG weld is very clean. The grain size in weld seam of TIG joint is finer and more uniformly distributed than that of MIG joints. The grain size in heat affected zone (HAZ) of MIG joints is coarser than that of TIG joints. The grain size in fusion zone of both joints is quite uneven. Two kinds of joints cracked along the fusion zone in the tensile test at room temperature. The strength and plasticity of TIG joint is better than that of MIG joint.
Key words:  2219 aluminum alloy thick plate,weld shape,microstructure,mechanical tensile property