激光-电弧复合焊接临界速度规律研究

高明; 熊征; 曾晓雁; 严军

doi:doi:10.3788/cjl20093609.2438

中国激光, 2009, 36 (9): 2438, 网络出版: 2009-10-09

激光-电弧复合焊接临界速度规律研究

Experimental Study on Critical Speed of Laser-Arc Hybrid Welding

论文大纲

高明 ^*熊征曾晓雁严军

作者单位

华中科技大学光电子科学与工程学院，武汉光电国家实验室(筹)，湖北武汉 430074

激光技术复合焊接焊接速度激光功率电弧电流坡口间隙 laser technique hybrid welding welding speed laser power arc current groove gap

摘要

为了加深对激光-惰性气体熔化极电弧(MIG)复合焊接特性的认识程度，采用厚4 mm的Q235低碳钢系统研究了激光功率、电弧电流和坡口间隙对复合焊接临界速度的影响规律。结果表明,激光功率、电弧电流和复合焊接临界速度成正比关系。激光功率是决定上临界速度v_max的主要因素，电弧电流是决定下临界速度v_min的主要因素。增加坡口间隙能同时提高v_max和v_min，但其对v_min的影响更显著。在实验范围内，坡口间隙对v_max和v_min的最大提高幅度分别可达20%和35%。此外，激光功率越大，复合焊接可选速度范围Δv越大。在既定激光功率下，增加电弧电流会减小Δv。

Abstract

For improving the understanding of laser-metal inert gas (MIG) hybrid welding, the effects of laser power, arc current and groove gap on critical speed of this process are studied on Q235 mild steel with thickness of 4 mm. The results show laser power and arc current are direct proportional to the critical speed of hybrid welding. The maximum and minimum critical speed, v_max and v_min are mainly determined by the laser power and arc current, respectively. Increasing groove gap can both increase v_max and v_min but the effect on v_min is bigger. In the experiment, the effects of groove gap on v_max and v_min can reach 20% and 35% respectively. Moreover, the reliable welding speed range of hybrid welding, Δv is increased with laser power. For the constant laser power, increasing arc current will decrease Δv.

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高明, 熊征, 曾晓雁, 严军. 激光-电弧复合焊接临界速度规律研究[J]. 中国激光, 2009, 36(9): 2438. Gao Ming, Xiong Zheng, Zeng Xiaoyan, Yan Jun. Experimental Study on Critical Speed of Laser-Arc Hybrid Welding[J]. Chinese Journal of Lasers, 2009, 36(9): 2438.

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