Effect of metal powder characteristics on metallurgical quality of laser powder bed fusion additive manufacturing
Laser powder bed fusion additive manufacturing technology is currently the most widely used forming technology in the field of metal additive manufacturing,which has the characteristics of high forming accuracy,fine grain size,low surface roughness,and excellent mechanical properties.However,poor metallurgical quality is a common problem faced by current formed components.This article reviews the effect of powder particle size,morphology,and surface state on the metallurgical quality of laser powder bed fusion additive manufacturing from the perspective of adjusting the physical characteristics of metal powders.It proposes suggestions for controlling the powder to have a reasonable particle size distribution,higher sphericity,lower surface roughness,and lower sur-face energy after considering factors such as printing parameters,powder production cost,and operational difficul-ty,and summarizes the means of adjusting powder physical characteristics.
metal powderpowder characteristiclaser powder bed fusion additive manufacturingmetallurgical qualitybuilding density
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