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Xiao Rongshi, Chen Kai, Chen Jimin, Zuo Tiechuan. Experimental research of the plasma shielding mechanism in the process of CO2 laser welding[J]. LASER TECHNOLOGY, 2001, 25(3): 238-241.
Citation: Xiao Rongshi, Chen Kai, Chen Jimin, Zuo Tiechuan. Experimental research of the plasma shielding mechanism in the process of CO2 laser welding[J]. LASER TECHNOLOGY, 2001, 25(3): 238-241.

Experimental research of the plasma shielding mechanism in the process of CO2 laser welding

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  • Received Date: August 29, 1999
  • Revised Date: January 16, 2000
  • Published Date: May 24, 2001
  • A 20kW CO2 laser was applied to explore the plasma shielding mechanism by studying the effect of plasma height on the welding depth and the focusing laser beam.On the basic phenomenon that the laser induced plasma would sustain for a while even after the laser beam passed through out of the workpiece during high power CO2 laser welding, a simple and effective method is developed to record the effect of plasma on the focusing laser beam.It is found that the laser induced plasma enlarges the diameter of the focused laser beam and the focus shifts downward significantly.This "lensing effect" of the laser induced plasma becomes more serious with the increase of the plasma height.Compared with the absorption of plasma, the "lensing effect" is the main mechanism for plasma shielding in the process of high power CO2 laser welding.
  • [1]
    Locke E,Hoag E,Hella R. Weld J,1972;51(5):245~249
    [2]
    Giren B G. J A P,1991;(24):1086~1087
    [3]
    Poueyo A,Deshors G,Fabbro R et al. Study of laser induced plasma in welding conditios with continuous high power CO2 lasers. LAMP'92,1992:323~328
    [4]
    Fabbro R. Beam-plasma coupling in laser material processing. LAMP'92,1992:305~310
    [5]
    Fowler M C,Smith D C.J A P,1975;46:138~150
    [6]
    Xiao R S,Zuo T C,Volz R. Chinese Journal of Lasers,1998;B7(6):550~554
    [7]
    肖荣诗. CO2激光深熔焊接光致等离子体行为研究.北京工业大学博士学位论文,1997
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