Using a Laser to Engrave Metal

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Inorganic materials having high thermal and electrical conductivity are known as metals. Metals can be rolled into plates or cast or machined into more complicated forms. Pure metals, such as iron or chrome, are examples of metals. Alloys, or mixes of two or more elements, can also be found in metals. Stainless steel, for example, includes both iron and chromium. Metals are frequently used for laser marking. With enough laser power, laser cutting and engraving are also conceivable.

 

Laser Processes Types

From novel product development to high-volume manufacturing, lasers are becoming increasingly important in material processing. The energy of a laser beam interacts with a substance to alter it in some manner in all laser operations. The laser beam’s wavelength, power, duty cycle, and repetition rate are all accurately regulated for each transformation (or laser operation). The following are some of the laser processes:

 

Annealing with a laser

Cutting using a laser

Drilling using a laser

Engraving using a laser

Etching using lasers

Machining using lasers

Marking with a laser

Micromachining using a laser

Perforating with a laser

Engraving using a laser

Photo Marking using a Laser

Scoring with a laser

Sintering using a laser

Surface Modification Using Lasers

Ablation with a Selective Laser

Every substance has its features that determine how the laser beam interacts with it and, as a result, affects it. The following are the most prevalent metal processing methods:

 

Metal cutting using a laser

Most metals readily absorb the energy of a Fiber laser beam, causing the material directly in the laser beam’s path to rapidly heat up and melt. The laser beam will melt entirely through the material if the laser intensity is strong enough. The metal is removed as it melts using a high-pressure air jet, resulting in clean and straight edges with minimum heat impacted zone.

 

Metal Engraving using a Laser

May regulate The fibre laser beam’s strength to only remove (engraves) material to a certain depth. Typically, many laser engraving passes are necessary. Metal laser engraving usually has a depth of 0.003 to 0.005″. (75 to 125 microns). However, removing too much metal in one go might result in melting or deformation. As a result, metal engraving is frequently done in several steps. Permanent identification markings may be created using the laser engraving procedure, which is resistant to heat and wear.

 

Metal marking using a laser

Without removing any material, Laser marking metals alters the look of a metal surface. For metals, there are various distinct forms of laser marking that may be employed. A Fiber laser or a CO2 laser can be used for direct laser marking. The laser beam energy warms the metal surface, causing it to oxidize indirect marking. The metal that has been subjected to the laser beam darkens as a result of this oxidation, leaving an indelible black imprint. The Fiber laser may also be used to make a brilliant, polished mark on metal. Metal can also be marked indirectly by applying a coating like metal marking compound or removing a covering like paint.

 

Processes That Work Together

The laser cutting, engraving, and marking above may integrate the procedures above without relocating or re-framing the metal item.

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