What is laser engraving and how does it work?
Laser engraving is a process that vaporizes materials into fumes to engrave permanent, deep marks. The laser beam acts as a chisel, incising marks by removing layers from the surface of the material. The laser hits localized areas with massive levels of energy to generate the high heat required for vaporization.
Laser engraving technology is typically used to engrave metal workpieces that will be exposed to various types of wear or surface treatments. Metal engraving works with steel and aluminum (including anodized and die-casting aluminum).
The most outstanding feature of this process is its ability to engrave 2D codes that keep high readability rates after post-process treatments. Those treatments can include shotblasting, e-coating and heat treatments, addressing the most complex traceability issues.
But if engraving the most resistant identifiers isn't needed, laser etching is generally preferred because it's a high-speed method that doesn't rely as heavily on ablation.
You can laser etch a wider variety of materials, including steel, aluminum, anodized aluminum, lead, magnesium, and zinc.
There's also a unique method called laser annealing to mark metals like stainless steel.