SLM laser selective melting technology is one of the main techniques in additive manufacturing of metal materials. In this technology, laser is selected as the energy source, and layer by layer scanning is carried out in the metal powder bed according to the path planned in the three-dimensional CAD slice model. The scanned metal powder is melted and solidified to achieve the effect of metallurgical combination, and finally the metal parts designed by the model are obtained.

LENS technology is a combination of rapid prototyping and laser cladding. The metal powder is used as raw material and high energy laser is used as heat source. The metal powder is melted layer-by-layer and rapidly solidified according to the CAD model of the part.

Laser cladding technology refers to the placement of certain coating materials on the surface of the coated substrate with different filling methods, and the laser makes both the coating material and the substrate surface melt at the same time. The cladding layer has low dilution but strong bonding force. It is metallurgically combined with the substrate, which can significantly improve the wear resistance, corrosion resistance, heat resistance, oxidation resistance or electrical properties of the surface of the substrate material, so as to achieve the purpose of surface modification or repair, and meet the specific performance requirements of the material surface while saving a lot of materials.