Laser Submerged Arc Welding (LUPuS) with Solid State Lasers
Laser Submerged Arc Welding (LUPuS) with Solid State Lasers
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使用固态激光器的激光埋弧焊 (LUPuS)
DOI：
10.1016/j.phpro.2014.08.067
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
Jakobs
中科院分区：
文献类型：
--
作者：
Reisgen;Olschok;Jakobs
激光-埋弧复合焊接方法源于这样一种认识，即随着熔透深度的增加，激光焊接过程有在焊缝下部形成气孔的趋势。与能源效率高的埋弧工艺相结合，可改进脱气并减少气孔形成的倾向。新开发的混合焊接工艺允许单道焊厚度大于20 mm的板材，以及采用双面单道焊技术焊接较厚的板材。在这种特殊的混合焊接工艺中，当熔渣向前滑动的焊剂与激光光路相遇时，使用CO2激光会造成问题，并在光路中形成不可控的等离子体羽流。然后，这种等离子体保护工件不受激光能量的影响，从而引发激光小孔的坍塌，并导致工艺不稳定。用现代固体激光器取代了CO2激光器，大大提高了混合工艺的性能和稳定性。这篇文章将展示最新的结果和改进，通过焊接厚度不超过40 mm的钢板获得的结果。
The laser beam-submerged arc hybrid welding method originates from the knowledge that, with increasing penetration depth, the laser beam process has a tendency to pore formation in the lower weld regions. The coupling with the energy-efficient submerged-arc process improves degassing and reduces the tendency to pore formation. The newly developed hybrid welding process allows the welding of plates with a thickness larger than 20 mm in a single pass and the welding of thicker plates with the double-sided single pass technique.In this special hybrid process, the use of CO2-lasers causes problems when forward sliding flux of slag meets the laser beam path and forms an uncontrollable plasma plume in the beam path. This plasma then shields the work piece from the laser power and thus provokes the collapse of the laser keyhole and leads to process instability. The substitution of the CO2-laser with a modern solid-state laser significantly improves the performance and the stability of the hybrid process. This contribution will demonstrate the latest results and improvements by means of welding results gained with steel plates with a thickness of up to 40mm.