Those who are familiar with laser cutting machine know that auxiliary gas suitable for the material to be cut must be added during laser cutting. The auxiliary gas can blow away the slag in the slit, cool the surface of the processed object, reduce the heat affected zone, cool the focus lens, and prevent the lens from overheating. Therefore, selecting the type of auxiliary gas will have a certain impact on the cutting performance, cutting speed, cutting thickness, etc. How to choose the auxiliary gas of laser cutting machine? The high-energy lasers are introduced one by one.
1. Oxygen
The oxygen reaction can improve the cutting efficiency in a large format, and the oxide film produced will also improve the spectral absorption factor of the reflective material beam. It is mainly applicable to rolled steel, rolled steel for welding structure, carbon steel for mechanical structure, high tension plate, tool plate, stainless steel, galvanized steel plate, copper, copper alloy, etc.
2. Nitrogen
Nitrogen can prevent oxidation free cutting of oxide film. The main applicable plates are stainless steel, galvanized steel plate, brass, aluminum, aluminum alloy, etc.
3. Air
It can be directly provided by air compressor, which is relatively cheap compared with other gases. The main applicable materials are aluminum, aluminum alloy, stainless copper, brass, galvanized steel plate, non-metal, etc.
4. Argon
It is used to prevent oxidation and nitridation, and can also be used in welding. The main applicable materials are titanium, titanium alloy, etc.
