METHOD FOR ADDITIVE MANUFACTURING OF A PART

• Main Authors: GIRAUD, Rémi, COURAPIED, Damien, ASSAINTE, Matthieu
• Format: Patent
• Language: English; French
• Published: 26.09.2024
• Subjects: 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; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; CASTING; MAKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; PERFORMING OPERATIONS; POWDER METALLURGY; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TRANSPORTING; WORKING METALLIC POWDER; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

The present invention relates to a method for additive manufacturing of a part, comprising the following successive steps: forming a layer of powder on a construction support; using a high-energy device to perform a melting step in which the layer of powder thus formed is illuminated by means of at least one beam and the at least one beam is moved in order to form a temperature profile at each point of the layer, said profile including successively: a first, positive thermal gradient G1 for gradually preheating the powder, a melting peak for melting the powder, and a second, negative thermal gradient G2 for gradually cooling the powder. La présente invention concerne un procédé de fabrication additive d'une pièce, comprenant les étapes successives suivantes : la formation d'une couche de poudre sur un support de construction, la réalisation par un dispositif à haute énergie d'une étape de fusion dans laquelle on éclaire ladite couche de poudre ainsi formée au moyen d'au moins un faisceau et on déplace ledit au moins un faisceau pour former en chaque point de ladite couche un profil de température, comportant successivement : un premier gradient thermique positif G1 de préchauffage progressif de la poudre; un pic de fusion de la poudre et un second gradient thermique négatif G2 de refroidissement progressif de la poudre.