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激光-电弧复合焊接临界速度规律研究 被引量:7

Experimental Study on Critical Speed of Laser-Arc Hybrid Welding
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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4mm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Vmax的主要因素,电弧电流是决定下临界速度Vmin的主要因素。增加坡口间隙能同时提高Vmax和Vmin,但其对Vmin的影响更显著。在实验范围内,坡口间隙对Vmax和Vmin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△v越大。在既定激光功率下,增加电弧电流会减小△v。 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, Vmax and Vmio are mainly determined by the laser power and arc current, respectively. Increasing groove gap can both increase Vmax and Vmin)rain but the effect on Vmin is bigger. In the experiment, the effects of groove gap on v and Vmin can reach 20 % and 35 % respectively. Moreover, the reliable welding speed range of hybrid welding, △v is increased with laser power. For the constant laser power, increasing arc current will decrease △v .
作者 高明 熊征 曾晓雁 严军 Gao Ming, Xiong Zheng, Zeng Xiaoyan, Yan Jun ( Wuhan National Laboratory for Optoelectronics, School of Optoelectronics Science and Engineering, Huazhong University of Science and Technology, Wuhan , Hubei 430074, China)
出处 《中国激光》 EI CAS CSCD 北大核心 2009年第9期2438-2442,共5页 Chinese Journal of Lasers
关键词 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
作者简介 高明(1975-),男,博士后,主要从事激光先进制造技术方面的研究。E-mail:mgao@mail.hust.edu.cn
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