Laser welding of laminated electrical steels

Weldability of the high-grade electrical steel B27ahv1500 has been researched. Weld bead characteristics, torsion strength and magnetic properties of the welded laminations were measured and analyzed. Torsion strength of the welded laminations was linearly related to the weld bead area. Iron loss of the laminations welded at the speed of 10 mm/s had a percentage of increase of 24 compared to that of the laminations without welding when the magnetic flux density was 1.0 T. Lower boundary of the welding speed can be determined by the magnetic properties requirement and upper boundary of the welding speed can be determined by the torsion strength requirement.