Method for additive fabrication of parts by selective melting or selective sintering of tightly optimized powder beds using high energy beams

摘要

The present invention relates to a manufacturing method for manufacturing a part by selective melting or selective sintering of a powder bed with a high energy beam, a) providing the material in the form of powder particles, and b) on the building support. C) depositing a first powder layer of material; c) scanning the region of the first powder layer with a beam and locally heating the powder in the region to a temperature above the sintering temperature of the powder; Particles of molten or sintered powder form at least one first monolithic element, d) placing a second powder layer of material on the first powder layer, e) second powder layer with beam At least one region of the substrate is heated to heat the powder in this region to a temperature higher than the sintering temperature of the powder, and the powder particles thus sintered or melted have at least one second integral element. Forming step, f) steps d) and e) Welfare, relates to a manufacturing method of parts comprising placing each new powder layer on the preceding layer to be fully formed. The powder contains a multimodal grain size distribution. [Selection] Figure 1