Laser welding process useful in the production of flaw-free welds and in welding coated metal sheets has pre- and post-heating in the weld seam region

摘要

A laser welding process with pre- and post-heating in the weld seam region, where in welding and heating, a laser of the same power is used, and the time between welding and heating is such that the temperature decrease at the irradiation surface from the time of the first irradiation to that of the next one is less than 50%.