ABSTRACT The effect of P/S-wave on the solidification feeding and the mechanism of vibration promoting the solidification feeding in the low-pressure casting are discussed in the paper. The casting defects were analysed by X-ray non-destructive testing and the buoyancy method. It can be found that the compactness of casting is greatly improved by vibration. In the solidification feeding, according to vibration theory, P-wave will play a decisive role. When the transmission direction of P-wave is perpendicular to the feeding direction, it will lead to the alternation of dense-sparse state in the solidification system. When feeding is blocked, in the sparse state, the diameter of the feeding channel will increase, so that the pressure loss of feeding decreases. At the feeding end, the feeding pressure will make the solidification feeding again. On the contrary, vibration can’t further promote the feeding in the dense state.

中文翻译：

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ZL205A合金低压铸造纵波促进凝固补料机制

摘要 本文讨论了P/S波对低压铸造凝固补料的影响以及振动促进凝固补料的机理。采用X射线无损检测和浮力法对铸件缺陷进行分析。可以发现，振动大大提高了铸件的致密性。在凝固加料中，根据振动理论，P波将起决定性作用。当P波的传输方向与馈电方向垂直时，会导致凝固系统中的密疏状态交替。当进料受阻时，在疏散状态下，进料通道的直径会增加，从而降低进料压力损失。在加料端，加料压力会使凝固再次加料。