公开(公告)号：US12128375B2

公开(公告)日：2024-10-29

申请号：US17632359

申请日：2020-07-31

申请人： HYDROMECANIQUE ET FROTTEMENT

发明人： Sébastien Bucher ,  Christophe Gérard Pupier

IPC分类号： C23F1/00 ,  B01J13/04 ,  B22F1/065 ,  B22F1/145 ,  B22F1/17 ,  B22F10/28 ,  B22F10/34 ,  B33Y40/10 ,  B33Y70/00

CPC分类号： B01J13/04 ,  B22F1/065 ,  B22F1/145 ,  B22F1/17 ,  B22F10/28 ,  B22F10/34 ,  B33Y40/10 ,  B33Y70/00 ,  B22F2301/052 ,  B22F2301/10 ,  B22F2301/25 ,  B22F2304/10

摘要： The present invention relates to a method for preparing a metal powder intended for an additive manufacturing process, of the type that involves scanning a bed of powder by a near-infrared laser beam, characterized in that the method comprises: an initial step for selecting a powder, which has an optical reflectivity of higher than 70% for a wavelength ranging between 800 and 1500 nm; then a step for treating said powder, which is different from particle grafting, and which induces a physical and/or chemical surface modification of the grains of said powder, making it possible to lower its optical reflectivity, at the given wavelength. The invention also relates to the use of such a powder, the grains having, after treatment, a median grain size d50 of between 5 and 50 μm.