Laser metal cutting process is also added with cutting material suitable auxiliary gas. Oxygen is used as an auxiliary gas in the steel cutting process to generate an exothermic chemical reaction with the molten metal to oxidize the material, while helping to blow away the slag within the kerf. For the processing of high precision metal parts, commercially available nitrogen as an auxiliary gas. Most organic and inorganic materials can be laser cut. In the heavy metal manufacturing industry, many metal materials, regardless of their hardness, can be shaped without distortion (currently the most advanced metal laser cutting machine can be cut industrial steel thickness has been Close to 20mm). Of course, they are also good heat transfer conductors for highly reflective materials such as gold, silver, copper and aluminum alloys, so laser cutting is difficult or impossible to cut (some difficult-to-cut materials can be cut using pulsed laser beams, Due to the extremely high peak power of the pulsed wave, the absorption coefficient of the material to the light beam increases rapidly momentarily.