The reason why laser cutting machine uses nitrogen for cutting metal
Hongte Metal Laser Cutting Machine
When the laser cutting machine cuts steel or stainless steel and other materials, it will use the auxiliary gas. For example, when oxygen is used as the auxiliary gas, it will produce an exothermic reaction, which is particularly obvious when cutting carbon steel. The program is widely recognized.
In this process, oxygen is used to project the laser beam on the metal surface to heat the steel plate and bring about an exothermic reaction, so that the temperature of the area reaches the melting point, and the molten metal is blown out and separated from the material , After all, it constitutes a smooth cutting surface with an oxide layer.
But on the other hand, when cutting stainless steel, because stainless steel has a higher melting point, its characteristics are also different. When cutting quality and smoothness are included in the assessment, because oxidation is used as a paving gas, it will The metal surface constitutes residual oxides, so the cutting quality cannot reach good results.
In order to solve this problem, after repeated research by laser experts, nitrogen was finally used as the auxiliary gas. Because nitrogen is an endothermic process, it is essentially a process of evaporation and ablation. Higher pressure means Higher operating costs.
Nozzle diameter has a greater impact on gas consumption, so cutting thicker materials requires larger nozzles, so cutting stainless steel generally uses nitrogen as an auxiliary gas.
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