Laser cutting will produce a lot of heat, so high heat is concentrated together, it will make the material at the cutting place burn, oxidation reaction, and it is also easy to make the processed parts deformed. Therefore, we need to add some auxiliary gas. The role of auxiliary gases in laser cutting is to help combustion, blow away the molten material in the cut, prevent oxidation, and protect parts such as the focusing lens. These gases can blow away the slag produced during cutting and can protect the lenses from slag sticking to the lenses, thus prolonging the service life of the lenses.

Do you know what auxiliary gases are commonly used in laser cutting machines? Laser cutting machine can use auxiliary gases are mainly oxygen, nitrogen, air and argon these kinds of, the following we for different auxiliary gases, to give you an introduction to its use and characteristics, for your reference only.

1、Air

Air can be provided directly by the air compressor, so the price is very cheap compared with other gases. Although air contains about 20% of oxygen, but the cutting efficiency is far less than oxygen, cutting ability is similar to nitrogen. Trace amounts of oxide film will appear on the cutting surface, but it can be used as a measure to prevent the coating layer from peeling off. Yellowing of the cut end surface.

The main applicable materials are aluminum, aluminum alloy, stainless copper, brass, plated steel, non-metal and so on.

2、Nitrogen

Some metals in the cutting of oxygen will form an oxide film on the cutting surface, the use of nitrogen can be prevented from oxide film oxidation-free cutting. Oxidation-free cutting surface can be directly fused, coated, corrosion resistance and other characteristics. The cut end surface is whitened.

The main applicable plates are stainless steel, plated steel, brass, aluminum, aluminum alloy and so on.

3、Oxygen

Mainly used for laser cutting machine cutting carbon steel. The use of oxygen reaction heat to improve the cutting efficiency of a large surface at the same time, the resulting oxide film will improve the spectral absorption factor of the beam of reflective materials. Cutting end face black or dark yellow.

It is mainly used for calendered steel, calendered steel for dissolving structure, carbon steel for mechanical structure, high tension plate, tool plate, stainless steel, electroplated steel plate, copper, copper alloy, and so on.

4、Argon gas

Argon is an inert gas, used in laser cutting machine cutting to prevent oxidation and nitriding, also used in fusion welding, compared with other processing gases, the price is higher, the corresponding increase in cost. The cut end face is whitened.

The main applicable materials are titanium, titanium alloy and so on.