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　　As a type of processing technology, laser cutting of carbon steel can encounter various technical problems, and black edge problem is a common one. What are the reasons for laser cutting carbon steel black edges and how can they be avoided? Let's take a look together.

　　The key to laser cutting carbon steel without black edges lies in these points

　　Analysis of the causes of black edges in laser cutting of carbon steel

　　The fundamental reason for the occurrence of black edges in laser cutting of carbon steel is the output of heat during the laser cutting process. The metal material itself has good thermal conductivity. Generally speaking, the heat generated during the cutting process will diffuse through the cutting gap and be slowly cooled in the metal sheet. However, due to the differences in physical properties such as metal material and density, the outer side of the hole can be fully cooled in the small hole processing of laser cutting carbon steel. However, the residual part on the inner side of a single hole cannot be diffused in time due to the narrow space for heat diffusion, resulting in the accumulation of heat and even the occurrence of slag hanging. In addition, during the laser cutting process of thick carbon steel plates, the accumulation of molten metal and heat on the surface caused by drilling can disrupt the auxiliary airflow, resulting in excessive heat input for a certain period of time and causing black edges.

　　The key to laser cutting carbon steel without black edges lies in these points

　　Solution to Black Edges in Laser Cutting of Carbon Steel

　　The key to solving the black edge problem in traditional carbon steel cutting methods that rely on oxygen as an auxiliary gas is to effectively suppress the generation of oxidation reaction heat. In this case, auxiliary oxygen can be used during perforation, and lagging switching to auxiliary air or nitrogen can be used to complete the cutting. This method can process small holes with a thickness value of one sixth of the thickness plate. The pulse cutting conditions with high peak and low frequency output power during laser cutting of carbon steel can reduce heat output, which is beneficial for optimizing cutting conditions. The cutting conditions can be set to a single pulse laser beam, high peak output with high energy intensity, and low frequency specifications. This will effectively reduce the accumulation of molten metal during laser perforation, thereby effectively suppressing heat output and reducing the occurrence of black edge phenomenon.