Authors:
Felix Radtke (1), Markus Mirz (2), Klaus Dollmeier (3), Simone Herzog (1,2), Christoph Broeckmann (1,2)
1- Institute of Applied Powder Metallurgy and Ceramics (IAPK), Aachen, Germany
2- Institute for Materials Engineering in Mechanical Engineering, Aachen, Germany
3- Georgsmarienhütte Holding GmbH, Georgsmarienhütte, Germany
Abstract:
Austenitic high nitrogen steels (HNS) are the material of choice in the aerospace, medical, and electronics industry due to their unique combination of high strength, ductility and corrosion resistance. The standard manufacturing route of HNS parts comprises of pressure electroslag remelting and machining by turning or milling. In this study, the Powder Bed Fusion – Laser Beam Metal (PBF-LB/M) process was developed for the austenitic HNS grade X13CrMnMoN18-14-3. Analysis of key factors, such as porosity and manganese content, led to an optimized process window. Solution annealing ensured a fully austenitic transformation of an unintended duplex structure on cost of the fine as-built microstructure. Metallurgical analysis allowed the discussion of the effects of nitrogen content and microstructure on strength, hardness and toughness. The study achieved the desired material properties and contributes to the development of improved materials for the PBF-LB/M process.
DOI:
https://doi.org/10.59499/EP246278588
