摘要
为推动激光—电弧复合焊接的工程应用，对其接头间隙桥接能力进行了系统研究。结果表明：激光一电弧复合焊接具有很强的间隙桥接能力，板厚4mm时最大可焊间隙量为1．8mm，板厚6mm时最大可焊间隙量为2．8mm；存在获得良好焊缝成形的接头间隙范围，板厚4mm时接头间隙范围为0．5～1mm，板厚6mm时接头间隙范围为0．6～1．2mm；电弧电流能够同时改变电弧压力、熔池重力、母材和填充材料熔化数量及坡口间隙两边熔化母材的熔合状况，是提高复合焊接可焊间隙量的关键因素；在相同焊速下，较高的电弧电流有利于厚板可焊间隙量的提高，薄板则需要相对较低的电弧电流来提高可焊间隙量。
For the industrial application of laser--arc hybrid welding, the groove gap bridging abil ity of this process was investigated in detail. The results show that this process has strong groove gap bridging ability： for 4mm thick plate, the weldable gap is 1.8mm and that of 6mm thick plate is 2.8mm. There also exist optimal ranges of groove gap with good weld shape. It is 0.5-1mm and 0.6-1.2mm to the 4mm and 6mm thick plate respectively. In the laser-arc hybrid welding, arc current can synchronously determine the arc pressure, the gravity of molten pool, the quantity of melted substrate and filler wire, as well as the fusion state of substrate on the both sides of groove gap. So it is the key factor to the increase of welable gap of hybrid welding. Furthermore, with the same welding speed big arc current can enhance the weldable gap of thicker plate, while relatively smaller arc current should be used to increase that of thin plate.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2008年第20期2496-2500,共5页
China Mechanical Engineering
