Good results are obtained when the material is 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.
Oxygen can be used in cases where it is acceptable to oxidize the cut end face; nitrogen is used to obtain an oxidized, burr-free edge and no further processing is required. Coating the oil film on the surface of the board will result in better perforation without sacrificing processing quality.
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.
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. 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.