Abstract
In order to enhance the range of processable alloys of laser-based powder bed fusion, reinforced alloys have gained focus. Satelliting is a recently introduced method for adding fine additives to larger parent powder particles using a bonding agent. Satellited particles prevent a local demixing due to size and density effects of the powder. In this study, the satelliting method is used for the additivation of Cr3C2 to AISI H13 tool steel via a functional polymer binder (pectin). The investigation includes a detailed binder analysis and comparison to the previously used PVA binder as well as processability in PBF-LB and the microstructure of the alloy. The results reveal that pectin is a suitable binder for the satelliting process and the demixing behavior that appears when using a simple powder blend can be significantly reduced. However, the alloy is enriched with carbon, which results in austenite being retained. Thus, in future research, a reduced binder content will be investigated.
Original language | English |
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Article number | 3649 |
Number of pages | 15 |
Journal | Materials |
Volume | 16 |
Issue number | 10 |
DOIs | |
Publication status | Published - 10 May 2023 |
Keywords
- laser-based powder bed fusion
- additivation
- polymer binder
- powder application
- microstructure
- carbides
- tool steel
- POLYVINYL-ALCOHOL
- MICROSTRUCTURE
- MORPHOLOGY
- ADSORPTION
- PARTICLES