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Analysis of matters needing attention when cutting different materials with powerful green laser

Sep 22 , 2021

Analysis of matters needing attention when cutting different materials with powerful green laser

 

As the fields of laser cutting applications become more and more extensive, more and more materials are applicable. However, different materials have different characteristics, so the matters needing attention when using laser cutting are also different. The following is a brief analysis of the main materials used in laser cutting:

 

steel

 

Better results will be obtained when the material is laser cut with oxygen. When oxygen is used as the processing gas, the cutting edge will be slightly oxidized. For plates with a thickness of 4mm, nitrogen can be used as a processing gas for high-pressure cutting. In this case, the cutting edge will not be oxidized. For plates with a thickness of more than 10mm, using a special pole plate for the laser and oiling the surface of the workpiece during processing can achieve better results.

 

Stainless steel

 

Cutting stainless steel requires: laser cutting uses oxygen, when edge oxidation does not matter; using nitrogen to obtain an oxidation-free and burr-free edge, no further treatment is required. Coating the oil film on the surface of the plate will get a better perforation effect without reducing the processing quality.

 

aluminum

 

Despite its high reflectivity and thermal conductivity, aluminum with a thickness of 6mm or less can be cut, depending on the alloy type and laser capabilities. When cutting with oxygen, 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. Aluminum can only be cut when a "reflection absorption" device is installed on the system. Otherwise, the reflection will destroy the optical components.

 

titanium

 

The titanium sheet is cut with argon and nitrogen as the processing gas. Other parameters can refer to nickel-chromium steel.

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Copper and brass

 

Both materials have high reflectivity and very good thermal conductivity. Laser cutting brass with a thickness of 1mm or less can be cut with nitrogen; copper with a thickness of 2mm or less can be cut, and the processing gas must be oxygen. Copper and brass can be cut only when a "reflection 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 the dangerous substances that may be emitted. Synthetic materials that can be processed by laser cutting are: thermoplastics, thermosetting materials and synthetic rubber.

 

Organic matter

 

There is a fire hazard in laser cutting in all organic cuttings (nitrogen is used as the processing gas, and compressed air can also be used as the processing gas). Wood, leather, cardboard and paper can be laser cut, and the cut edges will be burnt (brown).

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