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1. WO2020239764 - METHOD FOR ADDITIVE MANUFACTURING OF A METAL PART

Publication Number WO/2020/239764
Publication Date 03.12.2020
International Application No. PCT/EP2020/064574
International Filing Date 26.05.2020
IPC
B33Y 10/00 2015.01
BPERFORMING OPERATIONS; TRANSPORTING
33ADDITIVE MANUFACTURING TECHNOLOGY
YADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
10Processes of additive manufacturing
B22F 3/105 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
3Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor
10Sintering only
105by using electric current, laser radiation or plasma
CPC
B22F 2999/00
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
2999Aspects linked to processes or compositions used in powder metallurgy
B22F 3/1055
B33Y 10/00
BPERFORMING OPERATIONS; TRANSPORTING
33ADDITIVE MANUFACTURING TECHNOLOGY
YADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
10Processes of additive manufacturing
Applicants
  • L'AIR LIQUIDE SOCIÉTÉ ANONYME POUR L’ÉTUDE ET L'EXPLOITATION DES PROCÉDÉS GEORGES CLAUDE [FR]/[FR]
Inventors
  • LEFEBVRE, Philippe
  • CHARPENTIER, Coralie
  • ROSAIN-GUEU, Marc
Agents
  • DEBECKER, Isabelle
Priority Data
FR190565428.05.2019FR
Publication Language French (FR)
Filing Language French (FR)
Designated States
Title
(EN) METHOD FOR ADDITIVE MANUFACTURING OF A METAL PART
(FR) PROCÉDÉ DE FABRICATION ADDITIVE D'UNE PIÈCE MÉTALLIQUE
Abstract
(EN)
The invention concerns a method for additive manufacturing of at least one metal part in which the metal part is formed by layers from a base material (14) comprising at least one metal powder, several layers of the base material (14) being deposited successively one on top of the other, each layer being, prior to the deposition of the next layer, melted by at least one laser beam (9) in a predefined region (7) that corresponds to a cross-sectional region of the metal part to be manufactured, the method being carried out in a protective gas atmosphere formed by a protective gas containing an inert gas and carbon dioxide, the inert gas containing at least one inert component chosen from argon, helium and nitrogen. According to the invention, the protective gas contains at least 1 vol% and at most 20 vol% of carbon dioxide.
(FR)
L'invention concerne un procédé de fabrication additive d'au moins une pièce métallique dans lequel ladite pièce métallique est formée par couches à partir d'un matériau de base (14) comprenant au moins une poudre métallique, plusieurs couches dudit matériau de base (14) étant déposées successivement les unes sur les autres, chaque couche étant, avant le dépôt de la couche suivante, fondue par au moins un faisceau laser (9) dans une région prédéfinie (7) qui correspond à une région de section transversale de la pièce métallique à fabriquer, ledit procédé étant opéré sous une atmosphère gazeuse protectrice formée par un gaz de protection contenant un gaz inerte et du dioxyde de carbone, le gaz inerte contenant au moins un composant inerte choisi parmi l'argon, l'hélium, l'azote. Selon l'invention, le gaz de protection contient au moins 1% en volume et au plus 20% en volume de dioxyde de carbone.
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