Advanced Search
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

More Information
  • 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
  • Cited by

    Periodical cited type(6)

    1. 史蒲英,陈林,刘向宏,庞智聪,何卫锋,李芹芹,李应红. 表面激光冲击对双态组织Ti55531钛合金疲劳裂纹扩展速率的影响. 稀有金属材料与工程. 2024(10): 2823-2830 .
    2. 覃恩伟,刘丽霞,刘成威,陆海峰,吴树辉. 316L不锈钢的低能量激光冲击强化工艺. 金属热处理. 2022(09): 92-97 .
    3. 王一刚. 强脉冲激光照射TC11合金组织和抗氧化性能分析. 激光技术. 2020(05): 639-642 . 本站查看
    4. 李翔,何卫锋,聂祥樊,罗思海,杨竹芳. 新型光斑搭接对平顶激光冲击钛合金力学性能的影响. 中国表面工程. 2019(01): 38-47 .
    5. 姜银方,季彬,赵勇,华程,孟李林,彭涛涛. 应力水平对激光冲击强化圆角疲劳寿命的影响. 激光技术. 2018(03): 369-373 . 本站查看
    6. 宁成义,张文武,徐子法,张正. 激光冲击强化5083铝合金力学性能的实验研究. 应用激光. 2017(06): 819-824 .

    Other cited types(7)

Catalog

    Article views (1) PDF downloads (9) Cited by(13)

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return