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Influence of multi-spot exposure of powder bed on melt pool stability in selective laser melting
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Paper Abstract

Part quality and building time during selective laser melting strongly correlates with the quality of the melting tracks and the melting rate respectively. Conventional processes can be improved by changing their parameters. Increase of the building rate is achieved by modifying the laser beam properties, e.g. spot size and laser power, and process parameters, such as layer thickness and scanning speed. However, process acceleration often leads to appearance of balling, spatters, evaporation and undercuts with subsequent degradation of component quality. The present investigation introduces an innovative way towards increasing of melting rate without lowering part quality. In our approach, the laser beam energy is efficiently distributed on the powder bed by means of beam splitting. This leads to the generation of high volume melt pools. Finally, an outlook on further increase of the melting rate is given.

Paper Details

Date Published: 4 March 2019
PDF: 8 pages
Proc. SPIE 10909, Laser 3D Manufacturing VI, 1090908 (4 March 2019); doi: 10.1117/12.2508210
Show Author Affiliations
M. Slodczyk, Robert Bosch GmbH (Germany)
A. Ilin, Robert Bosch GmbH (Germany)
T. Kiedrowski, Robert Bosch GmbH (Germany)
V. Ploshikhin, Univ. Bremen (Germany)

Published in SPIE Proceedings Vol. 10909:
Laser 3D Manufacturing VI
Bo Gu; Henry Helvajian; Hongqiang Chen, Editor(s)

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