A method of laser welding a composite material with a component and laser weldable composite material for such a method

摘要

The invention relates to a method for laser welding a composite material (V) with a component (11), in particular for producing a solar collector element (E), wherein the composite material (V) comprises a band-shaped carrier (1) consisting of a metal with high reflectivity for laser radiation. comprising a first side (A) and a second side (B), wherein at least on the first side (A) is a dielectric coating (7) and wherein for producing a weld a laser beam (L) at an acute orientation angle (μ) is projected onto at least the first side (A) of the carrier (1) provided with the dielectric coating (7). To improve the energy efficiency of the laser radiation used, it is proposed that the ceramic coating (7) has a thickness (D) in the range from 140 nm to 120 nm and the laser beam (L) at an orientation angle (μ) in the range from 2 ° to 50 ° is irradiated, so that the incident energy of the laser beam (L) is absorbed to at least 15 percent.