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。增加坡口问隙能同时提高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町达20%和35%。此外,激光功率越大,复合焊接町选速度范围Δv越大。在既定激光功率下,增加电弧电流会减小Δv。
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 .
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
