Crack Suppression Method of 7075 Aluminum Alloy Laser Welding Based on Filling-in Board
In response to the problem of defects such as porosity,cracks in aluminum alloy welding,7075-T6 aluminum alloy sheet was taken as the research object.Based on the observation of the cross-sectional morphology of the pulse laser welding seam,experiments were conducted on 7075-T6 aluminum alloy laser welding under different process parameters to analyze the causes of welding cracks.The results show that with the increase of time,the crack sensitivity of each point gradually decreases.When the height of the filled Flat noodles is 1.9 mm,the crack sensitivity of the weld is lower than the critical value,and the crack is basically suppressed.
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