Investigation on the case-hardening behavior of additively manufactured 16MnCr5

Bartels D, Klaffki J, Pitz I, Merklein C, Kostrewa F, Schmidt M (2020)

Publication Type: Journal article

Publication year: 2020

Journal

Metals MDPI

Book Volume: 10

Article Number: 536

Journal Issue: 4

DOI: 10.3390/met10040536

Abstract

Additive manufacturing (AM) technologies, such as laser-based powder bed fusion of metals (PBF-LB/M), allow for the fabrication of complex parts due to their high freedom of design. PBF-LB/M is already used in several different industrial application fields, especially the automotive and aerospace industries. Nevertheless, the amount of materials being processed using AM technologies is relatively small compared to conventional manufacturing. Due to this, an extension of the material portfolio is necessary for fulfilling the demands of these industries. In this work, the AM of case-hardening steel 16MnCr5 using PBF-LB/M is investigated. In this context, the influences of different processing strategies on the final hardness of the material are studied. This includes, e.g., stress relief heat treatment and microstructure modification to increase the resulting grain size, thus ideally simplifying the carbon diffusion during case hardening. Furthermore, different heat treatment strategies (stress relief heat treatment and grain coarsening annealing) were applied to the as-built samples for modifying the microstructure and the effect on the final hardness of case-hardened specimens. The additively manufactured specimens are compared to conventionally fabricated samples after case hardening. Thus, an increase in both case-hardening depth and maximum hardness is observed for additively manufactured specimens, leading to superior mechanical properties.

Authors with CRIS profile

Dominic Bartels Lehrstuhl für Photonische Technologien (LPT) Michael Schmidt Lehrstuhl für Photonische Technologien (LPT)

Additional Organisation(s)

Erlangen Graduate School in Advanced Optical Technologies (SAOT)

Involved external institutions

Schaeffler Technologies AG & Co. KG DE Germany (DE) H-O-T Härte- und Oberflächentechnik GmbH DE Germany (DE)

How to cite

APA:

Bartels, D., Klaffki, J., Pitz, I., Merklein, C., Kostrewa, F., & Schmidt, M. (2020). Investigation on the case-hardening behavior of additively manufactured 16MnCr5. Metals, 10(4). https://doi.org/10.3390/met10040536

MLA:

Bartels, Dominic, et al. "Investigation on the case-hardening behavior of additively manufactured 16MnCr5." Metals 10.4 (2020).

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