Selective Laser Melting (SLM) uses high-energy laser irradiation and completely melts metal powder to form 3D shapes, which is a very potential metal additive manufacturing technology. It is also called laser melting welding technology. Generally, it is regarded to be a branch of SLS technology.
In the process of SLS printing,The metal material used is a mixed powder of processed and low melting point metal or molecular material. The low melting point material is melted but the high melting point metal powder is not melted in the process.use We use the melted material to achieve the effect of bonding and molding.As a result,the entity has pores and poor mechanical properties. Remelting at high temperature is important if it needs to be used.
The whole process of SLM printing begins with slicing 3D CAD data and converting 3D data into many 2D data. The format of 3D CAD data is usually an STL file. It is also widely used in other layered 3D printing techniques. We can import the CAD data into the slicing software and set various attribute parameters, and also set some printing control parameters. In the process of SLM printing, firstly, a thin layer is printed uniformly on the substrate, and then the 3D shape printing is realized by the movement of the Z axis.
The entire printing process is carried out in a closed container filled with inert gas argon or nitrogen to reduce the oxygen content to 0.05%. The working mode of SLM is to control the galvanometer to realize the laser irradiation of the tiled powder, heating the metal until it is completely melted. When the irradiation table of one level is completed, the table moves down, and the tiling mechanism performs the tile operation again, and then the laser .After the completing of the irradiation of the next layer , the new layer of powder is melted and bonded with the previous layer,.This cycle is repeated to finally complete the 3D geometry.The working space is filled with inert gas to prevent the metal powder from being oxidized,.Some have an air circulation system to eliminate the spark generated by the laser.
The SLM printing services of JS additive are used in various fields, such as mold manufacturing, industrial precision components, aerospace, automobile manufacturing, medical applications, scientific research, and other small batch moldless production or customization. SLM technology rapid prototyping has the characteristics of uniform structure and no holes, which can realize very complex structure and hot runner design.