Laser welding process of welding together overlapped plated steel sheets

摘要

A laser lap welding process of welding together overlapped first (4) and second (5) plated steel sheets, comprising the steps of:
inserting inserts (11) between joining surfaces of the first plated steel sheet (4) and the second plated steel sheet (5) to form a gas discharge passage between parts of the first and second plated steel sheets around a weld line; and
irradiating parts of the first and second plated steel sheets extending on the weld line with a laser beam (Lw) to weld together the first and second plated steel sheets.