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Laser cutting of different materials

Superwave Laser Technology Co.,Ltd | Updated: May 07, 2018

With the development of laser cutting technology, the field of laser cutting is becoming more and more extensive. But different materials have different properties, so it is important to note the difference when using laser cutting. In the continuous practice, the attention of laser cutting for different materials is summarized.

The steel structure

This material will get better results when it is cut with oxygen. When oxygen is used as a processing gas, the cutting edge is slightly oxidized. For plates with a thickness of up to 4mm, nitrogen can be used as gas for high pressure cutting. In this case, the cutting edge will not be oxidized. The plates with a thickness of more than 10mm can be used to apply the special plate to the laser and oil can be applied to the surface of the workpiece in the process.

Stainless steel

Cutting stainless steel requires: use of oxygen, in the case of marginal oxidation: nitrogen can be used to get the edges without oxidation without burrs, so no more processing is needed. The coating film on the surface of the plate will get better effect without reducing the processing quality.


In spite of high reflectivity and thermal conductivity, aluminum with a thickness of less than 6mm can be cut, depending on the alloy and laser capabilities. When cutting with oxidation, the cutting surface is rough and hard. When using nitrogen, the cutting surface is smooth. Pure aluminum is very difficult to cut because of its high purity. Only when the system is equipped with "reflective absorption" device can the aluminum be cut. Otherwise reflection will destroy optical components.


Titanium plates are cut with argon and nitrogen as processing gases.

Copper and brass

Both materials have high reflectivity and very good thermal conductivity. Brass with a thickness of 1mm can be cut with nitrogen. Copper with a thickness of less than 2mm can be cut and processed gas must be oxygen. Copper and brass are cut only when there is a "reflective absorption" device installed on the system. Otherwise reflection will destroy optical components.

Synthetic materials

When cutting synthetic materials, keep in mind the dangers of cutting and dangerous substances that may be emitted. The available synthetic materials include thermoplastics, thermo-hardened materials and artificial rubber.

Organic matter

There is a danger of fire in all organic cutting (using nitrogen as a processing gas or compressed air as a processing gas). Wood, leather, cardboard, laser cutting, cutting edges will burn (brown).