FUSING ONE OR MORE CROSS SECTIONS BY ELECTRON BEAM POWDER BED FUSION

In summary the invention concerns a method for fusing one or more cross sections (C1, C2) in a powder bed (PB), a method for building an object (1, 2) and an electron beam powder bed fusion system (100). To provide an improved smoke-free process for electron beam powder bed fusion, enabling more com...

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Bibliographische Detailangaben
Hauptverfasser:	LOGVINOV, Ruslan, DRENDEL, Jan, HEINRICHSDORFF, Frank
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ADDITIVE MANUFACTURING TECHNOLOGY ADDITIVE MANUFACTURING, i.e. MANUFACTURING OFTHREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVEAGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING,STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING CASTING CLADDING OR PLATING BY SOLDERING OR WELDING CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING MACHINE TOOLS MAKING METALLIC POWDER MANUFACTURE OF ARTICLES FROM METALLIC POWDER METAL-WORKING NOT OTHERWISE PROVIDED FOR PERFORMING OPERATIONS POWDER METALLURGY SOLDERING OR UNSOLDERING TRANSPORTING WELDING WORKING BY LASER BEAM WORKING METALLIC POWDER
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Beschreibung
Zusammenfassung:	In summary the invention concerns a method for fusing one or more cross sections (C1, C2) in a powder bed (PB), a method for building an object (1, 2) and an electron beam powder bed fusion system (100). To provide an improved smoke-free process for electron beam powder bed fusion, enabling more complex geometries and reducing the need for postproduction/postprocessing of the built object following steps are proposed:- pre-sintering (S2) the cross sections (C1, C2) in the powder layer (Ln) by scanning the cross sections (C1, C2) with a first line energy,- fusing (S3) the cross sections (C1, C2) by scanning the cross sections (C1, C2) with a second line energy,wherein the second line energy exceeds the first line energy, preferably by at least a factor of 2 or at least a factor of 5.