Unstable Factors and Types of Defects in Laser Powder Bed Fusion Process
摘要
Laser powder bed fusion (L-PBF) is a complex process. Before machining, the CAD model of the part is sliced and dispersed by professional data processing software and the necessary supporting structure is added, then the scanning path is planned, and the processed data contains contour information which can control the movement of the laser beam. Then the data is imported into the L-PBF equipment, and the computer will adjust the profile information layer by layer and control the scanning mirror to deflect, so that the laser spot can melt the metallic powder selectively and bond with the previous layers of material.