A method for the additive manufacturing of a part by selective melting or selective sintering of optimised- compactness powder beds using a high energy beam

摘要

The invention concerns a method for manufacturing a part by the selective melting or selective sintering of powder beds using a high energy beam comprising the following steps: (a) providing a material in the form of powder particles (60), (b) depositing a first layer (10) of powder on a support member (80) , (c) scanning at least one region of said first layer (10) with the beam (95) in order to heat the powder locally in said region to a temperature higher than the sintering temperature of said powder , such that the particles of said melted or sintered powder from said region form at least one single -piece component (15) ,(d) depositing a second layer (20) of powder on said first layer (10) , (e) scanning at least one region of said second layer (20) with the beam (95) in order to heat the powder in said region to a temperature higher than the sintering temperature of said powder, such that the particles of said melted or sintered powder form at least a second single piece component (25), (f) repeating steps (d) and (e) for each new powder layer to be deposited above a preceding layer until the part is completely formed. Typically, the powder has a multimodal particle size distribution.