The nitrogen application of laser cutting machine

Nitrogen gas cutting characteristics of nitrogen gas cutting is the main advantage of high cutting quality, processing range, but there are also high cost of shortcomings. Here we can through the comparison and oxygen cutting to elaborate on the above characteristics. 1) According to the use of auxiliary gas, cutting quality of laser cutting machine can be divided into two kinds of cutting way, oxygen, nitrogen. Oxygen in oxygen cutting in combustion, melting temperature is close to the boiling point position. High temperature led to intense reaction, no guarantee that the section is smooth; In addition to the heat affected zone of the oxidation reaction, increase, make the cutting quality is relatively poor, prone to cutting seam width, cross section twill, poor surface roughness and quality defects such as slag. Nitrogen gas cutting material melt completely dependent on laser energy, nitrogen blow out slitting and avoid inappropriate chemical reaction. Temperature is relatively low melting point area, combined with nitrogen cooling, protection, stable reaction, uniform, high cutting quality. Section of exquisite and smooth, low surface roughness, and no oxide layer. 2) The price of cutting the cost of high purity nitrogen is 3 times of high purity oxygen. Oxygen cutting pressure requirements ( 1 ~ 4) * 105 pa, nitrogen is required ( 10～140*105Pa。 For example, cut 2 mm thick stainless steel plate, the oxygen pressure for 4 * 105 pa, 2 gas consumption. 3 m3 / h, nitrogen is corresponding to * 105 pa 14 and 15. 2立方米/小时。 And nitrogen requirement when cutting high power laser cutting machine, and increase the energy consumption. Nitrogen gas cutting comprehensive cost is more than 15 times of oxygen cutting.