What Are The Advantages And Features Of Nitrogen Gas For Laser Cutting Stainless Steel Sheets?
When laser cutting stainless steel sheets, nitrogen is usually used as an auxiliary gas to improve cutting speed and quality, and to reduce cutting defects and safety risks. The following general steps are usually used for laser cutting of stainless steel sheets with nitrogen:
Prepare the cutting machine and material: Install the cutting head and nitrogen nozzle on the cutting machine, and also prepare the stainless steel sheet to be cut.
Adjust the laser power and nitrogen flow rate: Adjust the laser power and nitrogen flow rate according to the thickness and hardness of the material to get the best cutting effect.
Start cutting: Place the laser cutting head at the starting point of the stainless steel plate and start cutting. During the cutting process, nitrogen gas is ejected from the nozzle, blowing away the molten metal and cooling the cutting area. At the same time, the laser beam penetrates the metal surface and cuts the desired shape.
Observe the cutting process: Observe the cutting process to ensure that both the quality and speed of the cut are as required. If needed, adjust the laser power and nitrogen flow.
End the cutting: After the cutting is completed, turn off the laser cutting machine and the nitrogen nozzle and remove the cut stainless steel sheet.
It should be noted that when using nitrogen for laser cutting of stainless steel sheets, the nitrogen flow and pressure should be controlled to avoid excess nitrogen. It is also important to pay attention to the safety of the cutting area to avoid fire or explosion caused by too much oxygen.
From the above whole process of using nitrogen as an auxiliary gas for cutting, the following advantages and characteristics of nitrogen can be seen
Increased cutting speed: The use of nitrogen accelerates the cutting process because it blows away the material melted by the laser, thus making it easier for the laser to penetrate the material surface and increasing the cutting speed.
Reduces heat affected area: The use of nitrogen reduces the heat affected area created during laser cutting because it blows away the melted material and cools the cutting area, thereby reducing heat transfer around the material and improving cut quality and accuracy.
Preventing oxidation: The use of nitrogen prevents oxidation of the material in the cut area because it removes the surrounding oxygen and prevents oxidation reactions from occurring in the cut area.
Reduction of cutting defects: The use of nitrogen reduces the thermal stress on the material, reducing cutting defects and distortion caused by thermal stress.
Reduced safety risks: The use of nitrogen reduces the oxygen content in the cutting area, reducing the risk of fire and explosion.
Therefore, the use of nitrogen as an auxiliary gas for laser cutting can improve cutting speed and quality and reduce cutting defects and safety risks.