When the laser cutting machine processes metal, the most widely used materials are stainless steel and carbon steel. Compared with aluminum, brass and other highly reflective metals, these two metals absorb light better, so laser cutting The use is more extensive.
What is the difference between a powerful laser cutting machine and stainless steel and carbon steel? What material is most suitable for laser cutting machine cutting? Come to battle~
The cutting process is very different
When using a laser cutting machine to process stainless steel, since stainless steel contains 10%-20% chromium, both iron and chromium are prone to exothermic reaction with oxygen during cutting. The chromium oxide has the property of preventing oxygen from entering the inside of the molten material. The amount of oxygen entering the molten layer is reduced, the oxidation of the molten layer is incomplete, the reaction is reduced, and the cutting speed is reduced.
When using a laser cutting machine to process carbon steel, oxygen is usually used as an auxiliary gas. More than 99% of the low carbon steel is iron. The oxidation of iron also generates a large amount of heat. Using oxygen as an aid can reduce the laser energy. The requirements, as well as the low melting point of the oxide, make the adhesion to the surrounding steel plate low, so that the slag is also easily blown away by oxygen, leaving a smooth cut surface without residue.
Different materials processing skills
When laser-cut mirror stainless steel, in order to prevent severe burns on the sheet, a laser film is required. Although there is membrane protection, there will be a little burn on the edges. At this time, it is necessary to strictly control the laser cutting process parameters during the processing to maintain the good corrosion resistance of such materials. The most important process parameters that affect the quality of stainless steel cutting are cutting speed, laser power, oxygen pressure and focus.
As the power of the cutting machine increases, the laser cutting machine can process thicker and thicker carbon steel. When cutting thicker low carbon steel plates, it needs to use larger diameter nozzles and low pressure oxygen pressure, so as to prevent cutting. Burn out the edge of the cut.
Compared with low carbon steel, stainless steel cutting requires higher laser power and oxygen pressure, while stainless steel cutting achieves a satisfactory cutting effect, but it is difficult to obtain a completely non-stick slag. The use of inert gas as an auxiliary gas to cut stainless steel can obtain non-oxidized trimming and is directly used for welding, but its cutting speed is reduced by about 10% compared with oxygen as an auxiliary gas.
Compared with the traditional processing method, the laser cutting machine has higher processing efficiency and can realize large-volume production. Therefore, it is widely used in the processing of stainless steel and carbon steel. Both metals are suitable for laser cutting processing, but the processing is presented. Efficiency, processing quality, you need to constantly explore and adjust to make the equipment to the best condition.