| 摘要 |
PURPOSE: To form a welded nugget having low porosity by applying a continuous laser beam welding to a galvanized steel sheet. CONSTITUTION: In this continuous laser beam welding method, the galvanized steel sheet members 10, 12 having buried zinc-coated bonding surface regions 20, 22 in the inner part are welded in an oxygen-enriched region formed so as to abut on the one side surface 18 of the members 10, 12. |
