Effect of Laser Pulse on Arc Plasma and Magnesium Target in Low-Power Laser/Arc Hybrid Welding

被引：12

作者：

Hao, Xinfeng ^{[1
]}

Liu, Liming ^{[1
]}

机构：

[1] Dalian Univ Technol, Sch Mat Sci & Engn, Dalian 116024, Peoples R China

来源：

IEEE TRANSACTIONS ON PLASMA SCIENCE | 2009年 / 37卷 / 11期

基金：

中国国家自然科学基金; 高等学校博士学科点专项科研基金;

关键词：

Concentrate; electric conducting route; laser keyhole; low-power laser/arc hybrid welding; negative wave of ac arc; STABILIZATION; PARAMETERS; GAS;

D O I：

10.1109/TPS.2009.2031538

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

Low-power laser/arc hybrid welding process of magnesium alloy shows that the weld capability of tungsten-inert-gas arc is improved under the action of laser pulses. The effect of laser pulse on arc plasma is analyzed by studying the plasma spectra, plasma shapes, and arc voltage in this paper. On the one hand, laser pulse attracts arc plasma to laser keyhole and improves the stability of arc plasma; on the other hand, laser pulse expands the arc plasma and concentrates the electric conducting route of arc plasma. All these increase the output power and energy density of arc plasma, so the welding penetration is improved. In addition, laser pulses are controlled to act on the negative wave of alternating-current arc (the target metal has negative polarity) in hybrid welding process to improve the stability of arc plasma and weld penetration.

引用

页码：2197 / 2201

页数：5

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