Research Status on Powder Recycling of Metal Powder BedFusion Additive Manufacturing

Powder bed fusion additive manufacturing technique can quickly form complex structural parts with high dimensional accuracy, and has received extensive attention in many fields. However, compared with traditional manufacturing methods, its cost is higher. The recycling of metal powder can effectively reduce manufacturing costs. Combined with the research progress on additive manufacturing metal powders, changes of the chemical properties, physical properties and parts properties of commonly used 316L stainless steel, Ti6Al4V alloy and IN718 alloy powders in the recycling process are summarized. On the basis of demand for additive manufacturing of civil aviation parts, several problems existing in metal powders recycling are analyzed, and solutions are proposed.