EP 4161725 A1 20230412 - METHOD AND APPARATUS FOR ADDITIVE MANUFACTURING UNDER PROTECTIVE GAS
Title (en)
METHOD AND APPARATUS FOR ADDITIVE MANUFACTURING UNDER PROTECTIVE GAS
Title (de)
VERFAHREN UND VORRICHTUNG ZUR ADDITIVEN FERTIGUNG UNTER SCHUTZGAS
Title (fr)
PROCÉDÉ ET DISPOSITIF DE FABRICATION ADDITIVE SOUS GAZ PROTECTEUR
Publication
Application
Priority
- DE 102020003426 A 20200606
- EP 2021064789 W 20210602
Abstract (en)
[origin: CA3181711A1] The invention relates to a method for additive manufacture of a workpiece under protective gas, wherein a workpiece is assembled from a sequence of workpiece contours, each of which is manufactured by selective sintering or melting of a powdery or wire-like material by applying an energy beam thereto, wherein a workpiece contour is manufactured under the effect of a protective gas consisting of carbon dioxide and an inert gas. According to the invention, the chemical composition of each workpiece contour is modified according to a specified program by variation of the composition of the protective gas. Heat treatment occurring after manufacture of the workpiece contour provides for defined mechanical and technological quality values of the workpiece contour. A workpiece having zones with defined mechanical and technological quality values is produced in this manner.
IPC 8 full level
B23K 15/00 (2006.01); B22F 3/00 (2006.01); B22F 10/00 (2021.01); B23K 26/12 (2006.01); B23K 26/342 (2014.01); B23K 28/00 (2006.01); B23K 35/30 (2006.01); B23K 35/38 (2006.01); B33Y 10/00 (2015.01)
CPC (source: EP US)
B22F 10/25 (2021.01 - EP); B22F 10/28 (2021.01 - EP US); B22F 10/32 (2021.01 - EP US); B22F 10/64 (2021.01 - US); B22F 12/70 (2021.01 - EP US); B23K 15/0086 (2013.01 - EP); B23K 26/125 (2013.01 - EP); B23K 26/127 (2013.01 - EP); B23K 26/342 (2015.10 - EP US); B23K 35/383 (2013.01 - EP); B33Y 10/00 (2014.12 - EP US); B33Y 30/00 (2014.12 - EP US); B33Y 40/20 (2020.01 - US); B22F 2201/10 (2013.01 - US); B22F 2999/00 (2013.01 - EP); B23K 28/003 (2013.01 - EP); B23K 35/308 (2013.01 - EP); B23K 2103/04 (2018.07 - US); Y02P 10/25 (2015.11 - EP)
Citation (search report)
See references of WO 2021245134A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
DE 102020003426 A1 20211209; BR 112022024890 A2 20230214; CA 3181711 A1 20211209; EP 4161725 A1 20230412; US 2023211419 A1 20230706; WO 2021245134 A1 20211209
DOCDB simple family (application)
DE 102020003426 A 20200606; BR 112022024890 A 20210602; CA 3181711 A 20210602; EP 2021064789 W 20210602; EP 21731940 A 20210602; US 202118000754 A 20210602