Abstract The present study addresses a new aluminium foam sandwich (AFS) manufacturing process by simplifying the technological processes and reducing costs by use of a two-step foaming process and hot-rolling. The interface between the coversheet and precursor core was bonded tightly by four passes of hot-rolling at 480 °C to realise simultaneous metallurgical bonding and foaming. The addition of Mg and pre-heated SiC makes the foaming process more stable and increases the apparent viscosity of the melt and decreases the adverse effects of gravity drainage and capillary action. The optimum foaming conditions occurred at a temperature of 720 °C for between 270 s and 390 s.

中文翻译：

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两步发泡工艺结合热轧制造泡沫铝夹芯板

摘要 本研究通过使用两步发泡工艺和热轧来简化工艺流程并降低成本，从而解决了一种新的泡沫铝夹层 (AFS) 制造工艺。通过4道480°C的热轧使覆盖层和前驱体芯之间的界面紧密结合，实现了同时冶金结合和发泡。Mg和预热的SiC的加入使发泡过程更加稳定，增加了熔体的表观粘度，减少了重力排水和毛细管作用的不利影响。最佳发泡条件发生在 720 °C 的温度下，持续时间在 270 秒到 390 秒之间。