| Welding characteristics in different laser-TIG hybrid manners |
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| 作者姓名： | 陈彦宾 雷正龙 李俐群 吴林 |
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| 作者单位： | StateKeyLaboratoryofAdvancedWeldingProductionTechnology,HarbinInstituteofTechnology,Harbin,150001 |
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| 摘 要： | An experiment for determining the laser-TIG hybrid welding characteristics was carried oat in three kinds of hybrid methods: CO2 laser-TIG coaxial hybrid, CO2 laser-TIG paraxial hybrid and Nd: YAG laser-TIG paraxial hybrid. The experimental results indicate that hybrid welding has two welding mechanisms in CO2 laser-TIG hybrid welding: deep penetration welding and heat conduction welding. As the effect of the laser-induced keyhole, the arc root is condensed, the current density and penetration depth increase significantly, the welding characteristic is apt to deep penetration welding.When current increases to some degree, the keyhole induced by laser disappears, which produces a shallow penetration and wide bead. The weld exhibits heat conduction welding characteristics. Furthermore, the arc images and weld bead crosssections of three kinds of hybrid manners were also compared and analyzed at different welding currents, which established the foundation for understanding the welding characteristics of laser-TIG hybrid welding comprehensively.
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| 关 键 词： | TIG焊 激光焊接 Nd：YAG激光 CO2激光 焊接机制 |
Welding characteristics in different laser-TIG hybrid manners |
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| Chen Yanbin,Lei Zhenglong,Li Liqun and Wu LinState Key Laboratory of Advanced Welding Production Technology,Harbin Institute of Technology,Harbin,..Welding characteristics in different laser-TIG hybrid manners[J].China Welding,2004,13(1):41-45. |
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| Authors: | Chen Yanbin Lei Zhenglong Li Liqun and Wu LinState Key Laboratory of Advanced Welding Production Technology Harbin Institute of Technology Harbin |
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| Affiliation: | State Key Laboratory of Advanced Welding Production Technology,Harbin Institute of Technology,Harbin,150001 |
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| Abstract: | An experiment for determining the laser-TIG hybrid welding characteristics was carried out in three kinds of hybrid methods: CO_2 laser-TIG coaxial hybrid, CO_2 laser-TIG paraxial hybrid and Nd: YAG laser-TIG paraxial hybrid. The experimental results indicate that hybrid welding has two welding mechanisms in CO_2 laser-TIG hybrid welding: deep penetration welding and heat conduction welding. As the effect of the laser-induced keyhole, the arc root is condensed, the current density and penetration depth increase significantly, the welding characteristic is apt to deep penetration welding. When current increases to some degree, the keyhole induced by laser disappears, which produces a shallow penetration and wide bead. The weld exhibits heat conduction welding characteristics. Furthermore, the arc images and weld bead cross-sections of three kinds of hybrid manners were also compared and analyzed at different welding currents, which established the foundation for understanding the welding characteristics of laser-TIG hybrid welding comprehensively. |
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| Keywords: | laser-TIG hybrid welding welding characteristics welding mechanisms |
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