Selective Laser Melting (SLM), also known as laser melting welding technology, this technology 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 usually considered to be a branch of Selective Laser Sintering (SLS) technology.
The metal material used in SLS is a mixed powder of processed and low melting point metal or molecular material. During the processing, the low melting point material is melted but the high melting point metal powder is not melted. The melted material is used to achieve bonding and molding, so the entity has pores and poor mechanical properties. If it is to be used, it needs to be remelted at a high temperature.
The entire process of SLM printing starts with slicing 3D CAD data. It converts 3D data into many 2D data. The format of 3D CAD data is usually an STL file, which is also commonly used in other layered 3D printing techniques. We can import the CAD data into the slicing software and set various attribute parameters, as well as set some printing control parameters. During the printing process of SLM, 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, which reduces the oxygen content to 0.05%. The working method of SLM is to control the galvanometer to realize the laser irradiation of the tiled powder, heating the metal until it is completely melted. Each time 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 irradiation of the next layer is completed, the new layer of powder is melted and bonded with the previous layer, This cycle is repeated to finally complete the 3D geometry. Usually, 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.
Kings 3D's M250 SLM 3D printer is developed by Laseradd, a subsidiary of Kings 3D M280 SLM 3D Printer. Kings 3D's M250 SLM 3D printer is a medium-sized laser selective melting metal 3D printing equipment. It prints in a moderate size with high precision. With an ultra-efficient air filtration system and double circulation wind site protection system, double protection reduces printing defects and ensures the quality of parts. Widely used in production or custom molds, industrial precision components, aerospace, automobile manufacturing, medical applications, scientific research, etc.
