6061铝合金薄板激光焊接气孔控制研究  

Study on Pore Control and Mechanical Properties of Ultra-Thin 6061 Aluminum Alloy Plate by Laser Welding

作　　者：陈苗苗 文梦蝶 郑文海 张大斌[1] CHEN Miao-miao;WEN Meng-die;ZHENG Wen-hai;ZHANG Da-bin(School of Mechanical Engineering,Guizhou University,Guizhou Guiyang 550000,China)

机构地区：[1]贵州大学机械工程学院,贵州贵阳550000

出　　处：《机械设计与制造》2024年第10期359-363,共5页Machinery Design & Manufacture

基　　金：国家自然科学基金(51965009);贵州省科技计划项目(黔科合支撑[2020]2Y055号)。

摘　　要：为获得气孔少、成型良好和力学性能好的6061铝合金薄板焊接焊缝,利用YLS-6000光纤激光器对1.2mm厚6061铝合金薄板进行搭接焊试验,研究了焊透与未焊透焊缝中气孔的分布特征,并测量了气孔的半径、周长和面积参数,对比焊缝正反面差异;同时,研究了激光的平均功率、焊接速度和离焦量等工艺参数对焊缝气孔的影响规律。研究结果表明:6061铝合金薄板在焊透方式下的焊缝中气孔数量明显低于未焊透方式下焊缝中气孔数量,并且当激光功率过大和焊接速度过快时,均不利于抑制气孔的产生;而当激光功率P=2000W、焊接速度V=40mm/min、离焦量d=+4mm时,可获得成型好、气孔少和焊缝力学性能良好的焊缝。In order to obtain the 6061 aluminum alloy sheet welding seam with less porosity、good forming and good mechanical properties,the lap welding test of 1.2mm thick 6061 aluminum alloy sheet was carried out by YLS-6000 fiber laser,The distribution characteristics of porosity in the welds penetration and non-weld penetration pores were studied,measure the radius、circumference and area of pores,compare the difference between the Front and back sides of welds;At the same time,The effects law of the average laser power,welding speed and defocusing amount on the porosity of the weld were studied.The Results show that the number of porosity in the weld of 6061 aluminum alloy sheet under penetration is obviously lower than that non-weld penetration,and when the laser poweris too high and welding speed is too fast,are not conducive to inhibit the generation of pores,but when P=2000W laser power,welding speed V=40mm/min、the coke was d=+4mm、can obtain the weld with good shape,less porosity and good mechanical properties.

关 键 词：6061铝合金 焊接 气孔率 力学性能 

分 类 号：TH16[机械工程—机械制造及自动化]