一般等离子切割采用氩气、氮气或氢气作为等离子气体,主要用于切割不锈钢和有色金属,不适用于低碳钢。对于低碳钢,采用氧气乙炔切割较简便适用,采用一般等离子切割时有切割边粘连不容易清理的缺点。采用压缩空气等离子切割可避免这个问题,这是由于压缩空气具有氧化性。目前,国 General plasma cutting using argon, nitrogen or hydrogen as a plasma gas, mainly for cutting stainless steel and nonferrous metals, not suitable for low carbon steel. For low-carbon steel, the use of oxygen acetylene cutting easier and more suitable for general plasma cutting with cutting edge adhesion is not easy to clean the shortcomings. Compressed air plasma cutting avoids this problem because compressed air is oxidative. At present, the country