Patent ID: 10661389

Abstract:
The invention relates to a method for the laser welding of monolithic semi-finished products made from aluminium alloy, without filler wire, known to the person skilled in the art as “remote laser welding”, comprising the following steps: supplying at least two aluminium alloy semi-finished products, of which at least one is a rolled sheet of composition (wt.-%): Si: 2.5-14, preferably 2.7-5.0; Fe: 0.05-0.80, preferably 0.15-0.60; Cu: ≥0.20, preferably ≥0.10, also <0.05, and even <200, also 100 ppm; Mg: 0.05-0.80, preferably 0.20-0.40; Mn: ≥0.70, preferably ≥0.30; Cr: <0.35; Ti: 0.02-0.30; Sr up to 500 ppm; Na up to 200 ppm; Sb up to 0.15%, other elements <0.05 each and <0.15 total, remainder aluminium, on the condition that A: 5.2 Fe+1.95 Si−0.5 Cu−Mg≥7.0; and welding semi-finished products made from aluminium alloy, without filler wire, a method known the person skilled in the art as “remote laser welding”.