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Dual laser laser cutting machine
Before saying that the nozzle of the laser cutting machine has an impact on laser cutting, first say that the auxiliary gas plays a role in cutting. First, speed up the cooling rate of the cutting surface, reduce the heat affected zone, and help form a smooth cutting surface. Second, oxygen as an auxiliary gas can increase the reaction heat, more conducive to thick plate cutting. Third, inert gas as an auxiliary gas can prevent the workpiece oxidation, maintain the characteristics of the material itself.

1. Influence of oxide viscosity
Among all the technological parameters of laser cutting, the auxiliary gas pressure and gas flow characteristics are the important factors affecting the cutting quality. When cutting thick steel plates, such as carbon steel, oxygen is used as an auxiliary gas because iron oxides have a lower viscosity and are easier to remove from the cut.

Under normal circumstances, although the side of the carbon steel laser cutting incision contains a thin layer of iron oxide, in most cases, the quality of the laser cutting carbon steel cutting surface is acceptable. But because stainless steel contains chromium, and molten chromium oxide has a high viscosity, easy to bond in the incision side wall, so the same use of oxygen as an auxiliary gas, stainless steel processing quality is worse than carbon steel. If the gas pressure is not high, it is difficult to remove these oxides.

The same problem will occur when cutting aluminum and titanium alloy, because molten aluminum and titanium oxide also have higher viscosity, in order to obtain good cutting quality must require higher pressure of auxiliary gas. In fact, Cr, Al, Ti alloys are difficult to cut materials.