Laser GMA hybrid welding process of pipeline steel with a thickness of 23 mm

Laser welding

Work of the group focusses on:

• Welding and cutting of metals (pulsed and cw up to 16 kW)
• Laser welding of metals, from thin sheets (< 1 mm) up to thick sheets (> 20 mm)
• Welding of dissimilar materials
• Combining conventional welding processes with laser processing (hybrid welding)
• Processing of thermally sensitive materials and components
   

Current scientific work and projects:

• DOVOR „Reliable, high-power welding of high-strength, fine grain structural steels using a hybrid welding process with integrated, inductive pre-heating” (AiF)
  • Laser hybrid welding of steel materials (currently up to 22 mm thickness) with inductive pre-heating
  • Generation of high welding depths in combination with high feed rates
• StAlKo “Laser welding of steel and aluminum using a spectroscopic control of the welding depth and increased joint width with two-dimensional welding seams” (AiF/FAT)
  • Laser welding of dissimilar materials – aluminum and steel – for lightweight construction for resource conservation
  • Spectroscopic control of the welding depth for quality assurance
• SFB 599 „Implants with variable stiffness “ (DFG)
  • Further development of NiTi-based shape memory alloy (SMA) implants
  • Establishment of cw laser welding for NiTi SMAs
• KoSoFla „Cost reduction for the production of solar absorbers for flat-plate collectors (AiF)
  • Laser welding of non-similar metals (copper/aluminum and copper/steel) to cost-optimize the manufacturing process of solar absorbers
• AlDi “Development of an electrical feedthrough with a high-vacuum-tight, mechanically stable aluminum flange” (ZIM)
  • Laser welding of dissimilar materials (aluminum, copper, steel and nickel-based materials) to generate components which are high-vacuum-tight