Metal materials suitable for fiber laser cutting machine
With high-power YAG laser cutting system, the maximum thickness of stainless steel can reach 4mm.
The low-power YAG laser cutting system we developed can cut stainless steel up to 4mm thick.
Most alloy steels can be cut by laser, and the cutting quality is good.
However, high-tungsten tool steels and hot die steels will have erosion and sticky slag during laser cutting.
The modern laser cutting system can cut the maximum thickness of carbon steel plate is close to 20mm, and the slit of thin plate can be narrowed to about 0.1mm.
Laser cutting of low carbon steel has a very small heat affected zone, and it is flat, smooth and has good verticality.
For high carbon steel, the quality of laser cutting edge is better than that of low carbon steel, but its heat affected zone is larger.
Aluminum and alloy
Aluminum cutting belongs to melting cutting.
Auxiliary gas is used to blow away the molten material in the cutting area, and a better cutting quality can be obtained.
Currently, the maximum cutting thickness of aluminum plate is 1.5mm.
Other metal materials
Rhenium copper is not suitable for laser cutting, it could be cut very thin.
Laser can cut organic materials such as plastic (polymer), rubber, wood, paper products, leather and natural and synthetic fabrics;
It can also cut inorganic materials such as quartz and ceramics and other composite materials like new lightweight reinforcing fiber polymers.
What should pay attention to when cutting metal materials by laser?
For the cutting of structural steel materials, you should pay attention to:
Depending on the thickness of the plate, different cutting schemes can also be used.
For example, for structural steel plates of ordinary thickness, using oxygen as the processing gas will achieve very good results.
The disadvantage is that there are slight signs of oxidation at the cutting edge, but it does not affect use.
For thick plates with a thickness of more than 4mm, according to experience, the use of nitrogen can assist the cutting machine with high pressure cutting, so that structural steel with a thickness of more than 4mm can have better cutting effects.
The reason why nitrogen is used as the working gas is to take into consideration that the current period will not be oxidized, so as to prevent the oxidation effect of the cutting edge.
In fact, the most difficult thing to handle now is extra-thick steel with a thickness of more than 10mm.
When cutting this type of steel, using a special plate for the laser and applying oil to the surface of the workpiece during processing can achieve better results.
For cutting of stainless steel materials, you should pay attention to:
Different processing gases can be selected according to demand.
If oxygen is selected, in a high-temperature cutting environment, oxygen is easily oxidized and the cutting mouth is slightly matte.
However, if nitrogen is used as the processing gas, since the nitrogen is not easily oxidized at a high temperature, the cutting port can be very smooth.
Of course, if you encounter a very thick plate, you can apply oil film on the surface of the plate to make the perforation effect better, and it will not damage the processing quality.
For a junior cutting engineer, more attention should be paid to the cutting of stainless steel.
If they are not careful enough, optical devices will be damaged because of the high-temperature heating due to the strong reflection heat effect of stainless steel.
For the cutting of aluminum materials, please note:
The cutting of aluminum materials is also very common in daily cutting.
If using good laser cutting machines, it is easy for aluminum materials with a thickness of less than 6mm.
Depending on the rough surface quality of the cutting surface, you can use oxygen or nitrogen as the processing gas, mainly depending on your requirements for the smoothness of the cutting surface.
However, because aluminum is highly reflective, a special device should be installed when cutting aluminum to absorb the heat reflection of aluminum in order to prevent damage to optical components.
As with the stainless steel cutting precautions, the heat reflection damage of aluminum is very powerful, especially for those precision optical lenses.
For cutting of copper and brass materials, note the following:
A special consideration when cutting copper and brass plates is their high reflectivity and thermal conductivity.
When the thickness of the brass need to be cut is less than 1mm, nitrogen is the best cutting auxiliary gas.
When the thickness exceeds 2mm, oxygen is necessary.
At this time, nitrogen cannot be used as the cutting gas.
It is noted that due to the strong emissivity of these materials, special radiation absorption devices must be installed before installation, otherwise the high thermal reflection is harmful to the lens.