Different auxiliary gases are needed to cut different materials with a laser cutting machine

We know that different auxiliary gases are needed when cutting different materials with a laser cutting machine. So what is the specific situation? The auxiliary gas of the laser cutting machine is mainly used in: laser gas (the gas used in the laser generator to generate the laser), compressed air (usually used to protect the optical path, and some manufacturers also use it for protection) Gas), auxiliary gas (that is, the gas ejected from the cutting nozzle of the cutting machine as the landlord said) Let's take a look at it together.　　Laser cutting machine uses different auxiliary gases to cut different materials. The thickness of the cutting material is different, the pressure of the auxiliary gas and the required flow rate are different.　　The oxygen used for cutting carbon steel generally requires a purity of 99.5% or higher. The main function is to support combustion and blow off the cut melt. The pressure and flow rate are different for each laser cutting machine manufacturer, which is inseparable from the size of the cutting nozzle and the thickness of the cutting material. Generally, the pressure is required to be 0.3-0.8Mpa, and the cutting nozzle is generally 0.02-0.05Mpa. The flow rate is hard to say. For example, when cutting 22mm carbon steel, the flow rate of some manufacturers must reach 10M3/h (including the protective oxygen for the double-layer cutting nozzle) 　　 cutting stainless steel requires nitrogen. The function is to prevent oxidation reaction and blow off the molten material. There are high requirements for the purity of nitrogen (especially stainless steel with a thickness of 8mm or more, which generally requires a purity of 99.999%). The pressure requirements are relatively large, generally above 1Mpa. If you want to cut stainless steel with a thickness of 12mm or more, or thicker to 25mm, the pressure is required. Higher, more than 2Mpa or higher. The flow rate varies according to the type of cutting nozzle, but they are all very large. For example, cutting 12mm stainless steel requires 150m3/h for some manufacturers, and cutting 3mm, as long as the flow is below 50m3/h. In terms of cost, the oxygen used for cutting carbon steel is relatively cheap, and the amount of nitrogen used for cutting non-carbon steel is large. The thicker the stainless steel requires a high amount of nitrogen and purity. The cost is very high. Through the above introduction, I believe everyone is right There is also a certain understanding of this issue. I hope the above introduction can be helpful to everyone in the production work.