Comparative study on LF6 aluminum alloy of A-TIG and TIG welded joint

REN Xiaolei; CHAO Yaojie; ZOU Longjiang; ZENG Tao; CHAO Yaohui; WANG Dahong

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Comparative study on LF6 aluminum alloy of A-TIG and TIG welded joint
Vol. 48, Issue 5, Pages: 58-63(2018)
Published：2018
DOI：
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DOI：

REN Xiaolei, CHAO Yaojie, ZOU Longjiang, et al. Comparative study on LF6 aluminum alloy of A-TIG and TIG welded joint[J]. Eletric Welding Machine2018, 48(5): 58-63. DOI：

摘要

采用A-TIG焊和TIG焊两种不同的焊接方法对LF6铝合金进行对接焊。A-TIG焊采用小电流

TIG焊采用大电流

通过金相分析、拉伸断口扫描、EDS分析以及电子探针元素分析等一系列手段分析焊接接头在显微组织和力学性能以及元素分布上的差异。试验结果表明:A-TIG焊焊缝处组织与TIG焊相比更为粗大

且焊缝处的硬度也相对更高。A-TIG焊焊接接头的拉伸性能整体高于TIG焊。分别分析A-TIG焊及TIG焊的热影响区和焊缝区的元素

结果表明这两种焊接方法对热影响区及焊缝区域元素的影响几乎没有差别。

Abstract

Butt welding of LF6 aluminum alloy is carried out by two different welding methods

A-TIG welding and TIG welding. ATIG welding using small current

but TIG welding using large current

then use metallographic analysis

tensile fracture scan

EDS analysis and electron probe element analysis to analyze the differences between microstructure

mechanical properties and element distribution of welded joints. The test results show that the microstructure of A-TIG welding is thicker than that of TIG welding and the hardness of the weld is higher. The tensile performance of A-TIG welded joint is higher than that of TIG welding. The EDS analysis and the electron probe element analysis respectively on the heat affected zone and weld area of A-TIG welding and TIG welding are carried out respectively. The analysis data show that the influence of the two welding methods on the heat affected zone and the weld area element is almost undifferentiated.