Laser powder bed fusion of 30CrNiMo8 steel for quenching and tempering : examination of the processability and mechanical properties

Zumofen, Livia; Kirchheim, Andreas; Dennig, Hans-Jörg

Publication type:	Conference other
Type of review:	Peer review (abstract)
Title:	Laser powder bed fusion of 30CrNiMo8 steel for quenching and tempering : examination of the processability and mechanical properties
Authors:	Zumofen, Livia Kirchheim, Andreas Dennig, Hans-Jörg
et. al:	No
Conference details:	Fraunhofer Direct Digital Manufacturing Conference (DDMC 2020), Online, 23 June 2020
Issue Date:	23-Jun-2020
Language:	English
Subjects:	Additive Fertigung; Laser powder bed fusion; Laser beam melting; Steel for quenching and tempering; 30CrNiMo8 (AISI 4340); Mechanical properties
Subject (DDC):	670: Manufacturing
Abstract:	The layer-by-layer principle of additive manufacturing technology laser powder bed fusion (LPBF) opens up completely new possibilities in the design and manufacturing of lightweight and efficient gear components. For example, integration of contour conform cooling and lubrication channels into gear components can increase their service life and reduce lubricant consumption. Steels for quenching and tempering and case hardening steels are commonly used materials for gear components. However, the availability of these alloys for LPBF processing is still limited. In particular, the 30CrNiMo8 steel for quenching and tempering is frequently used for gear wheels. This specific alloy is largely unknown regarding LPBF processing and remains challenging, because of its susceptibility to cracking and the high temperature gradients that occur during the LPBF process. Therefore, this study focuses on the LPBF processing of 30CrNiMo8 powder material including process parameter evaluation and material characterization. Additionally, effects of the heat treatment on the resulting microstructure and mechanical properties were investigated. Within this study the 30CrNiMo8 has been processed successfully with a density of well above 99.5% leading to promising mechanical properties. A more homogenous microstructure has been achieved with quenching and tempering, compared to the as-build state.
URI:	https://digitalcollection.zhaw.ch/handle/11475/22203
Fulltext version:	Published version
License (according to publishing contract):	Licence according to publishing contract
Departement:	School of Engineering
Organisational Unit:	Institute of Product Development and Production Technologies (IPP)
Published as part of the ZHAW project:	SLM-Zahnräder: Funktions- und gewichtsoptimierte Zahnräder, die mit dem Selective Laser Melting Verfahren (SLM) hergestellt werden.
Appears in collections:	Publikationen School of Engineering

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Zumofen, L., Kirchheim, A., & Dennig, H.-J. (2020, June 23). Laser powder bed fusion of 30CrNiMo8 steel for quenching and tempering : examination of the processability and mechanical properties. Fraunhofer Direct Digital Manufacturing Conference (DDMC 2020), Online, 23 June 2020.

Zumofen, L., Kirchheim, A. and Dennig, H.-J. (2020) ‘Laser powder bed fusion of 30CrNiMo8 steel for quenching and tempering : examination of the processability and mechanical properties’, in Fraunhofer Direct Digital Manufacturing Conference (DDMC 2020), Online, 23 June 2020.

L. Zumofen, A. Kirchheim, and H.-J. Dennig, “Laser powder bed fusion of 30CrNiMo8 steel for quenching and tempering : examination of the processability and mechanical properties,” in Fraunhofer Direct Digital Manufacturing Conference (DDMC 2020), Online, 23 June 2020, Jun. 2020.

ZUMOFEN, Livia, Andreas KIRCHHEIM und Hans-Jörg DENNIG, 2020. Laser powder bed fusion of 30CrNiMo8 steel for quenching and tempering : examination of the processability and mechanical properties. In: Fraunhofer Direct Digital Manufacturing Conference (DDMC 2020), Online, 23 June 2020. Conference presentation. 23 Juni 2020

Zumofen, Livia, Andreas Kirchheim, and Hans-Jörg Dennig. 2020. “Laser Powder Bed Fusion of 30CrNiMo8 Steel for Quenching and Tempering : Examination of the Processability and Mechanical Properties.” Conference presentation. In Fraunhofer Direct Digital Manufacturing Conference (DDMC 2020), Online, 23 June 2020.

Zumofen, Livia, et al. “Laser Powder Bed Fusion of 30CrNiMo8 Steel for Quenching and Tempering : Examination of the Processability and Mechanical Properties.” Fraunhofer Direct Digital Manufacturing Conference (DDMC 2020), Online, 23 June 2020, 2020.