Solutions for joining pipe steels using laser-GMA-hybrid welding processes

This paper focuses on high power fiber laser welding of steel material for the field of pipe production. X65 and X70 steel plate material in thicknesses of 9.5 mm and 14 mm was welded with laser-GMA-hybrid welding processes with a maximum laser power of 8 kW. Two different filler wires and joint preparations were tested for their weldability. Relating to these welding procedures and thicknesses, characterisation of welded samples such as hardness, tensile testing and Charpy V-notch testing were carried out and the results will be reported in this paper.