Metal Marking and Engraving
Nowadays laser marking technology is more and more widely used. Especially in metal marking and engraving. Because laser technology offers an unrivalled combination of speed, flexibility and durability. And it can mark and engrave on metal. So this method is ideal for the most demanding industries in terms of quality, fast delivery and cost.
So in this article,we will introduce the laser marking principle and how to choose the right laser machine.
Laser marking machine working principle
1.Thermal marking on the surface:
When the intensity of the heat emitted by the laser beam causes a reaction in the material.But without reaching melting point, the metal changes color at the points of impact. The contrast is created very rapidly. And without penetrating the material or altering its properties.
Highly resistant to corrosion, this method is particularly suitable for the medical and aerospace sectors. And for use on metals such as titanium, stainless steel, steel, carbide.
2.Marking by layer ablation:
This is a method whereby a layer of coating is evaporated in order to reveal the color of the layer underneath. without damaging it: anodised aluminium, painted surfaces etc. The contrast is very rapid. And the result is clean and burr-free.
Ultra-fast, this method is highly suitable for the marking of nameplates.
Upon reaching melting temperature, this method melts and evaporates the material. The depth and color of the groove traced will vary according to the settings selected and the output of the laser machine.
Marking is direct and permanent, and resistant to wear. Very commonly used for the identification of high-volume parts in the automotive and mechanical industries. This process is also ideal for decorative engraving and the individuation of objects.
Finally, how to choose the right laser machine?
Different metals react in a different way to the same laser beam. The amount of light absorbed by the metal will depend on the wavelength used by the laser machine. Also on a number of other factors:
- Short pulse duration and high peak power will be more effective on reflective materials.
- Low frequency and high peak power will hollow out the material.
- Optimum speed or focusing settings will create contrast quickly and easily.
- The factors influencing the results are many and complex!
If you have any other questions, pls feel free to contact me. So our technical teams will conduct tests on your parts under real operating conditions. And we will advise you on the system and settings best suited to your needs.