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Printing parameters and strengthening mechanism of pneumatic injection additive manufacturing with iron powder slurry

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Abstract

Low-cost metal additive manufacturing remains difficult but would be of great practical value. To prepare slurry distributed evenly and stably, the present study thoroughly mixed metal powder, as a base material, with corresponding monomers, crosslinking agents, dispersant, initiator, and catalysts. A complex three-dimensional structure of iron powder slurry was built using a pneumatic injection additive manufacturing system. The effects of the injection pressure, platform speed, and nozzle diameter on the width of printed lines were studied. The stability of the width of a single printed line was investigated. It was found that the line width increases with an increase in the injection pressure or nozzle diameter and decreases with an increase in the moving speed of the platform. A reasonable drying, debinding, and sintering schedule was established, and the microstructures of dried, debinding, and sintered parts were analyzed. The sintered parts were denser than dried and debinding parts. The pneumatic injection additive manufacturing technology adopted in this study has the advantages of low manufacturing costs and a wide range of printing materials, and is applicable in the additive manufacturing of iron powder and a variety of other metal powders, thus widening the range of materials used in additive manufacturing.

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Acknowledgments

This research is supported by National Natural Science Foundation of China (No. 51675226) and Project of International Science and Technology Cooperation of Jilin Province (No. 20170414043GH).

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Authors and Affiliations

  1. School of Mechanical Science and Engineering, Jilin University, Renmin Street 5988, Changchun, Changchun, Jilin, 130025, China

    Wenzheng Wu, Haidong Du, Hang Sui, Xiaoyu Guo, Bofan Wang, Guiwei Li & Ji Zhao

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  1. Wenzheng Wu
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  2. Haidong Du
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  3. Hang Sui
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  4. Xiaoyu Guo
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  5. Bofan Wang
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  6. Guiwei Li
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  7. Ji Zhao
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Correspondence to Guiwei Li.

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Wu, W., Du, H., Sui, H. et al. Printing parameters and strengthening mechanism of pneumatic injection additive manufacturing with iron powder slurry. Int J Adv Manuf Technol 94, 3809–3817 (2018). https://doi.org/10.1007/s00170-017-1126-z

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  • DOI: https://doi.org/10.1007/s00170-017-1126-z

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