Powder-bed-based 3D printing with cement for sustainable casting

• DOI: 10.1016/j.jmrt.2022.12.102
• Publication Date: 2022-12-28T02:22:01Z
• Authors: Seung-Yeop Chun; Su-jin Kim; Woon-Gi Kim; Geumyeon Lee; Myeung-jin Lee; Bora Ye; Hong-Dae Kim; Jeong Hun Lee; Taewook Kim
• Keywords: 3DP; Mining engineering. Metallurgy; Additive manufacturing; TN1-997; 02 engineering and technology; Alumina cement; 0210 nano-technology; Mould; Ink-jet

3D printing allows for the cost-effective fabrication of moulds and can cast complex shapes. In this study, alumina cement fine aggregates refractories were used as main raw materials, saturation was adjusted to an appropriate level control binder mixture sand casting. For iron, mould must withstand temperatures up 1400 °C exhibit sufficient strength, gas permeability, thermochemical durability at high temperatures. To accomplish these requirements, powder prepared by adjusting ratio aggregate (D50: 30 μm) even finer component 4 μm). improve moulding quality, a green body optimise admixtures increase printer dimensional accuracy. The high-temperature evaluated measuring its strength after heat treatment, using Simultaneous Thermal Analysis (TG-DSC), through stability assessment. addition, pores specimens analysed microscale X-ray tomography. surface resolution tolerance final casting determined image roughness test scanner. exhibited shortest curing time highest when mass CA (CaO·Al2O3) C12A7 (12CaO·7Al2O3) 8:2. mixing 8:2, which based on relationship between flowability bed quality. results proved thermal 3D-printed mould, showed total reduction less than 3% low coefficient linear expansion 1300 °C. Consequently, suitability moulded body, composed with binder, >1400 demonstrated. Additionally, printed porous de-powdered easily, recyclability verified testing various ratios fresh recycled powder. Therefore, optimisation material combinations adjustment process parameters, optimal permeability could be achieved without any defect, while maintaining handling strength. findings study demonstrate potential expanding scope powder-bed-based market.