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Influence of baseplate heating and shielding gas on distortion, mechanical and case hardening properties of 16MnCr5 fabricated by laser powder bed fusion

: Schmitt, M.; Kempter, B.; Inayathulla, S.; Gottwalt, A.; Horn, M.; Binder, M.; Winkler, J.; Schlick, G.; Tobie, T.; Stahl, K.; Reinhart, G.

Fulltext ()

Procedia CIRP 93 (2020), pp.581-586
ISSN: 2212-8271
Conference on Manufacturing Systems (CMS) <53, 2020, Online>
Journal Article, Conference Paper, Electronic Publication
Fraunhofer IGCV ()

Additive manufacturing, especially laser powder bed fusion (LPBF), allows the build-up of complex parts and is, therefore, used in various industries. In order to exploit the potential in the automotive industry, the range of materials must be extended to include case-hardening steels, which are used in drivetrain parts. This paper examines the distortion of samples manufactured of the case-hardening steel 16MnCr5 (1.7131) via LPBF at varied baseplate temperatures and shielding gases, and also closely evaluates the resulting microstructure and hardness. Depending on the baseplate temperature, tempering or stress-relief annealing effects can be observed. For further insights into the process chain, dependencies between case hardening properties and manufacturing parameters are described.