The use of a laser as a tool for marking metal is very suitable. When marking steel materials, infrared light with a wavelength of 1064 nm is usually used. However, for metals with higher reflectivity, such as aluminum, copper and gold, they only absorb a small fraction of the infrared light.
The lasers of the MRJ-laser have the advantages of good beam quality and high peak power. In this case, choosing a short-wavelength beam (such as green light) will also give a good marking effect because the metal absorbs short-wavelength light more easily.
MRJ-Laser offers customers a wide range of laser marking machines with different power, different pulse widths and different wavelength options. High average power typically achieves high rates.
However, in the laser marking process, not only the power is important, but also the beam quality is equally important. The high-quality beam allows it to focus the laser beam at a very small point so that the workpiece surface can achieve high power density. Small area thermal effect. Thereby achieving the laser marking of the metal laser marking machine.
Since the short-wavelength laser can be better focused, the marking accuracy is higher in the case where the surface area is small. The pulsed laser beam acts on the workpiece in a series of single-point pulses that are either adjacent or overlapping. Pulses emit a precise amount of specific energy that allows energy and heat to enter the material.
Only a small part of the area is affected by thermal and mechanical effects. In general, there are three main methods widely used in industrial metal laser marking: engraving, ablation, and annealing.
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