AC4Cアルミニウム合金の金型鋳造時の冷却速度に及ぼす機械振動の影響

概要

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Gravity die casting of AC4C aluminum alloy with mechanical vibration (0-120Hz) was conducted. Columnar rod specimens (Φ25mm × L210mm) were cast to investigate the effect of mechanical vibration on cooling rate. The cooling rate of the alloy melt increased by imposition of mechanical vibration, and increased with an increase in the vibration frequency. By imposition of mechanical vibration, the mold temperature increased quickly and reached higher temperature. The surface roughness of rod specimens cast with mechanical vibration was about 30μm (bottom of the rod) to 20μm (top of the rod), markedly more rough than that of specimens cast without vibration (20μm (bottom) to 11μm (top) ). When the vibration frequency was more than 80Hz, the scattering of surface roughness reduced, indicating the scattering reduction of the air gap layer.
Japan Foundry Engineering Societyの論文