• CN:11-2187/TH
  • ISSN:0577-6686

›› 2013, Vol. 49 ›› Issue (4): 37-43.

• 论文 • 上一篇    下一篇

6061铝合金薄板低功率活性Nd:YAG激光焊的作用机理

王小博;杨立军;石文玲;王浪平;李桓   

  1. 天津大学材料科学与工程学院;天津大学天津先进连接技术重点实验室;哈尔滨工业大学先进焊接与连接国家重点实验室
  • 发布日期:2013-02-20

Acting Mechanism of Active YAG Laser Welding of 6061 Aluminum Alloy Plate with Lower Power

WANG Xiaobo;YANG Lijun;SHI Wenling;WANG Langping;LI Huan   

  1. School of Materials Science and Engineering, Tianjin University Tianjin Key Laboratory of Advanced Joining Technology, Tianjin University State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology
  • Published:2013-02-20

摘要: 研究NaCl、ZnCl2、LiCl和 KF等卤化物活性剂对激光焊接铝合金焊缝熔深的影响,发现卤化物活性剂能够使焊缝熔深明显增加。同时,运用高速摄像及光谱诊断的方法来分析卤化物活性剂对铝合金激光焊过程中等离子体温度、体积等物理参数的影响,并利用“双钨片”试验来分析卤化物活性剂对熔池金属流动状态的影响,以研究卤化物活性剂对增加焊缝熔深的作用机理。试验结果表明,卤化物活性剂的加入不仅能够降低激光焊等离子体的温度,使得等离子体对激光的散射、折射和逆韧致吸收减小,导致透过等离子体照射在试件表面的激光功率密度增大,使激光对试件的热输入增加,焊缝熔深增大;而且,卤化物活性剂的加入还会使熔池金属的流动状态发生改变,使得焊缝熔深增加。

关键词: 等离子体, 活性激光焊, 卤化物活性剂, 逆韧致吸收

Abstract: The effect of halide surfactant (such as NaCl, ZnCl2, LiCl, KF and so on) on the weld penetration of laser welding aluminum alloy is studied, and it is found that the halide surfactant can significantly increase the weld penetration. To study the mechanism that the halide surfactant is beneficial to fiercely increasing the welding penetration, the high-speed camera and technique of spectroscopic analysis is used to explore the influence of halide surfactant on physical parameter of plasma, such as temperature, volume and so on. And the experiment of two-sheet tungsten is conducted to explorer the influence of halide surfactant on flowage of welding pool. It is found that the halide surfactant can reduce the temperature of plasma, which leads to decrease the refection, scattering and inverse bremsstrahlung absorption of laser in the plasma, and increase the input of laser to workpiece. And the halide surfactant can change the state of circulation in the weld pool and make the penetration deepen.

Key words: Active laser welding, Halide surfactant, Inverse bremsstrahlung absorption, Plasma

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