The effect of air as auxiliary gas on cutting

1. For carbon steel plates, when air is used as an auxiliary gas for laser cutting, the section of the part will produce small burrs, but the burrs are not sharp and can be applied to parts that do not require high burrs.

2. For stainless steel plates, due to the air as an auxiliary gas, the cutting surface of the material will be oxidized after processing, which will cause the oxide to produce defects such as slag inclusions and pores in the weld bead during the welding of the cutting section, which will affect the quality of the weld and lead to The strength of the welded part decreases. Therefore, when using air as an auxiliary gas to complete the cutting of parts and then welding them, it is necessary to grind the oxide layer on the cross-section of the welded part to improve the welding quality. In addition, the section will be oxidized after cutting, resulting in a yellow oxide layer, which will have an impact if the part is an appearance part. The oxide layer also affects welding, and the oxide layer must be polished before welding.

3. For aluminum plates and aluminum alloy plates, using air as an auxiliary gas can reduce the cutting burr. If nitrogen is used, the cutting burr will be larger.