Version 1
: Received: 28 January 2021 / Approved: 29 January 2021 / Online: 29 January 2021 (13:09:59 CET)
How to cite:
Saewe, J.; Wilms, M.B.; Jauer, L.; Schleifenbaum, J. Influence of Preheating Temperature on Hardness and Microstructure of PBF Steel hs6-5-3-8. Preprints2021, 2021010622. https://doi.org/10.20944/preprints202101.0622.v1
Saewe, J.; Wilms, M.B.; Jauer, L.; Schleifenbaum, J. Influence of Preheating Temperature on Hardness and Microstructure of PBF Steel hs6-5-3-8. Preprints 2021, 2021010622. https://doi.org/10.20944/preprints202101.0622.v1
Saewe, J.; Wilms, M.B.; Jauer, L.; Schleifenbaum, J. Influence of Preheating Temperature on Hardness and Microstructure of PBF Steel hs6-5-3-8. Preprints2021, 2021010622. https://doi.org/10.20944/preprints202101.0622.v1
APA Style
Saewe, J., Wilms, M.B., Jauer, L., & Schleifenbaum, J. (2021). Influence of Preheating Temperature on Hardness and Microstructure of PBF Steel hs6-5-3-8. Preprints. https://doi.org/10.20944/preprints202101.0622.v1
Chicago/Turabian Style
Saewe, J., Lucas Jauer and Johannes Schleifenbaum. 2021 "Influence of Preheating Temperature on Hardness and Microstructure of PBF Steel hs6-5-3-8" Preprints. https://doi.org/10.20944/preprints202101.0622.v1
Abstract
Laser powder bed fusion (LPBF) is an additive manufacturing process employed in many industries, for example for aerospace, automotive and medical applications. In these sectors, mainly nickel-, aluminum- and titanium-based alloys are used. In contrast, the mechanical engineering industry is interested in more wear-resistant steel alloys with higher hardness, both of which can be achieved with a higher carbon content, like in high-speed steels. Since these steels are susceptible to cracking, preheating needs to be applied during processing by LPBF. In a previous study, we applied a base plate preheating temperature of 500 °C for HS6-5-3-8 with 1.3 % carbon content. We were able to manufacture dense (p > 99.9 %) and crack-free parts from HS6-5-3-8 with a hardness > 62 HRC (as built) by LPBF. In this study, we investigate the influence of preheating temperatures up to 600 °C on hardness and microstructure dependent on part height for HS6-5-3-8. The microstructure was studied by light optical microscopy (LOM), scanning electron microscopy (SEM) and electron backscatter diffraction (EBSD). The analysis of hardness and microstructure at different part heights is necessary because state-of-the-art preheating systems induce heat only into the base plate. Consequently, parts are subjected to temperature gradients and different heat treatment effects depending on part height during the LPBF process.
Keywords
LPBF; Laser Powder Bed Fusion; SLM; Selective Laser Melting; High-speed steel; tool steel; high carbon content; preheating temperature
Subject
Engineering, Industrial and Manufacturing Engineering
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
