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Note: Different materials have different characteristics in laser cutting

  • 2019-08-16 18:01:33

As the field of laser cutting is becoming more widespread, more and more materials are available. However, different materials have different characteristics, so there are different things to be aware of when using laser cutting. As following is a brief analysis of the main materials used in laser cutting:


steel

Laser cutting this material will give better results when cut with oxygen. When oxygen is used as the processing gas, the cutting edge is slightly oxidized. For plates up to 4 mm thick, high pressure cutting can be performed with nitrogen as the process gas. In this case, the cutting edge will not be oxidized. For plates with a thickness of 10 mm or more, special plates are used for the laser and oil is applied to the surface of the workpiece during processing to obtain better results.


stainless steel

Cutting stainless steel requires: laser cutting uses oxygen, if the edge oxidation is not tight; using nitrogen to obtain an oxidized burr-free edge, no further processing is required. Coating the oil film on the surface of the board will result in better perforation without sacrificing processing quality.


Aluminum

Despite the high reflectivity and thermal conductivity, aluminum with a thickness of less than 6 mm can be cut, depending on the alloy type and laser capability. When cut with oxygen, the cutting surface is rough and hard. When nitrogen is used, the cutting surface is smooth. Pure aluminum is very difficult to cut because of its high purity, and aluminum can only be cut when a "reflective absorption" device is installed on the system. Otherwise the reflection will destroy the optical components.


Titanium

The titanium plate was cut with argon and nitrogen as processing gases. Other parameters can be referred to nickel-chromium steel.


Copper and brass

Both materials have high reflectivity and very good thermal conductivity. Laser cutting of brass with a thickness of 1 mm or less can be cut with nitrogen; copper with a thickness of 2 mm or less can be cut, and oxygen must be used for the processing gas. Copper and brass can only be cut when a "reflective absorption" device is installed on the system. Otherwise the reflection will destroy the optical components.


Synthetic material

When cutting synthetic materials, keep in mind the dangers of cutting and dangerous substances that may be emitted. Laser cutting processable synthetic materials are: thermoplastics, thermosetting materials and elastomers.


Organic matter

Laser cutting is a fire hazard in all organic cuttings (using nitrogen as a process gas or compressed air as a process gas). Wood, leather, cardboard and paper can be cut with a laser and the edges are burnt (brown).

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