Nitrogen generation for laser cutting
Generating nitrogen on-site for laser applications can be cheaper and safer. Contact our experts now
Why use nitrogen for laser cutting?
Nitrogen is the most common assist gas used when the cut of the laser must be excellent. The process vaporizes the metal, and before the vaporized metal can re-solidify, the nitrogen gas moves it away from the cut edge.
Nitrogen is also essential in:
Reducing discoloration of the cut edge
Establishing a barrier between atmospheric oxygen and the heated metal edge
Assisting in heat dissipation, so the cut edge will cool faster
Preventing oxidation to avoid problems with the finished product
Helping to purge the laser beam
How nitrogen prevents oxidation during laser-cutting
Thanks to its inert properties, nitrogen allows the laser to operate in an oxygen-free environment without the risk of oxidation. When your application heats up and comes in contact with oxygen, a phenomenon known as oxidation occurs. This can cause a carbon layer to form on the cut edge resulting in issues such as poor product finish and adhesion problems for any coating or paint applied to the oxidised surface.
How nitrogen helps to purge the laser beam
To prevent the beam from distorting and to maintain power and intensity, the beam path needs to be kept clear of dirt particulates and any other contaminants that could cause it to diverge or lose power. Nitrogen is the ideal medium to use for beam guide-way purging as it is dry, clean, oil-free, and has a very low contaminant content.
