Influences of laser cleaning on surface morphology and laser-MIG hybrid welding characteristics of aluminum alloy

CHEN Jingwen; PENG Zhangzhu; WANG Feisen; YANG Xiaoyi; CAI Chuang; CHEN Hui

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Influences of laser cleaning on surface morphology and laser-MIG hybrid welding characteristics of aluminum alloy
Vol. 49, Issue 8, Pages: 66-71(2019)
Published：2019
DOI：
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DOI：

CHEN Jingwen, PENG Zhangzhu, WANG Feisen, et al. Influences of laser cleaning on surface morphology and laser-MIG hybrid welding characteristics of aluminum alloy[J]. Eletric Welding Machine2019, 49(8): 66-71. DOI：

摘要

利用扫描电子显微镜(SEM)观察激光清洗后的材料表面形貌

测试材料表面粗糙度和疏水性

并测量激光清洗材料后激光焊接的焊缝熔深。研究表明

相比打磨处理和原始表面

不同激光清洗参数对材料表面的形貌、粗糙度、疏水性有不同的影响。相比原始表面和机械打磨

激光光斑扫描速度低于100 mm/s时

随着扫描速度逐渐增大

铝合金表面粗糙度变大。激光清洗可一定程度上提高激光焊接质量

光斑扫描速度为50 mm/s时

熔深最大为3.374 mm

相比原始表面焊缝熔深提高了23.4%

相比打磨表面提高了10.1%。

Abstract

The materials surface morphologies were observed by using scanning electron microscope（SEM）. The surface roughness and hydrophobicity

laser-MIG hybrid welding penetration depth were investigated after laser cleaning. The results indicate that the materials surface morphology

surface roughness and hydrophobicity are different with various laser cleaning parameters. Compared to the as-received and mechanically polished samples

while the laser scanning speed less than 100 mm/s

the surface roughness of aluminum alloy increased with the increase of scanning speed. The laser-arc hybrid welding qualities were improved to some extent.The maximum penetration depth was 3.374 mm while the laser scanning speed was 50 mm/s. Compared to the as-received and mechanically polished samples

the weld penetration depth increased by 23.4% and 10.1%

respectively.