Laser cutting of stainless steel
When laser cutting stainless steel materials, if the requirements for edge oxidation are not very strict, oxygen can be used as the processing gas for cutting. If it is required that the edges without oxidation and burr must be obtained, then nitrogen should be used as the processing gas for cutting, so that the obtained edges do not need other treatment. If the laser is used for drilling, an oil film can be coated on the surface of the stainless steel plate, which will get a better perforation effect without reducing the processing quality.
Laser cutting of structural steel
When laser cutting structural steel materials, oxygen can be selected as the processing gas to get a better cutting effect, but it also faces the problem of slight edge oxidation. Especially for plates with a thickness of more than 4 mm, the influence of oxidation is more serious. Therefore, it is best to use nitrogen as the processing gas for high-pressure cutting of plates with a thickness of more than 4 mm. In this way, the problem of edge oxidation will not occur. For structural steel plates with a thickness of more than 10 mm, using special plates for lasers and coating a layer of oil film on the surface of the workpiece during processing can get better results.
Aluminum laser cutting
Because aluminum has high reflectivity and thermal conductivity, it is not suitable to use laser cutting for aluminum plates with large thickness. For aluminum materials with a thickness of less than 6mm, laser cutting can be used depending on the type of aluminum alloy and laser ability. If oxygen is used as processing gas, it is easy to cause rough and hard surface. A smooth cutting surface can be obtained by using nitrogen. Pure aluminum material is very difficult to cut because of its high purity and high reflectivity. Only when the "reflection absorption" device is installed on the system can pure aluminum be cut, otherwise the reflection will destroy the optical components of the laser.
Titanium laser cutting
It is not difficult to cut titanium. There is only one thing to pay attention to, that is, using argon and nitrogen as processing gas for cutting.
Laser cutting of copper and brass
Both copper and brass have high reflectivity and very good thermal conductivity, so they also belong to the category of materials that are difficult to cut by laser. Brass with thickness less than 1 mm can be cut with nitrogen. Brass with thickness between 1 mm and 2 mm must be cut with oxygen. Brass with thickness more than 2 mm cannot be cut with laser. In addition, similar to pure aluminum, when cutting copper and brass, a "reflection absorption" device must also be installed on the system, otherwise the reflection will destroy the optical components.
Synthetic materials and organics
In addition to metal materials, synthetic materials and organic materials are also materials that are often cut by laser, such as thermoplastic, thermosetting materials, artificial rubber, wood, leather, cardboard and so on. However, it should be noted that combustion hazards are easy to occur during cutting, and other emissions also have certain toxicity. These unsafe factors should be prevented. When organic matter is cut by laser, the edge of the material will be brown due to scorching.